Twin Disc Pto_1022762

Document Number: 1022762

TWIN DISCINCORPORATED

Power Take-off

Model: SP-111 Series SPE-111 Series SP-211 Series SPE-211 Series SP-311 Series RFD-111 Series RFD-211 Series

Service Manual

Red Front_cover.indd 1 8/10/2010 10:22:29 AM

NOTICE

Twin Disc, Incorporated makes no warranty or guaranty of any kind, expressed, implied or otherwise, with regard to the information contained within this manual. Twin Disc, Incorporated has developed this manual through research and testing of the information contained therein. Twin Disc, Incorporated assumes no responsibility for any errors that may appear in this manual and shall not be liable under any circumstances for incidental, consequential or punitive damages in connection with, or arising out of, the use of this manual. The information contained within this manual is subject to change without notice.

Red Front_cover.indd 2 8/10/2010 10:22:36 AM

Power Take-off Service Manual #1022762

Document Number1022762 Rev. A

IssuedFebruary, 2009

Power Take-offService Manual


REVISION AND REISSUE DATA

Issued June, 2007Revision A February, 2009

BEFORE YOU START

This manual replaces:#1015591 for use with model SP111HP Series,#1015850 for use with model RB11PM Series, #1015994 for use with model SP111OP Series,#1015995 for use with model SP111P Series,#1015996 for use with model SP211HP Series,#1015997 for use with model SP211OP Series,#1016065 for use with model SPE111HP Series,#1016067 for use with model SPE211HP Series,#1016068 for use with model SP211OP Series,#1016070 for use with model SP311P Series, and#1019021 for use with model RFD111 & RFD211 Series (Does not replace 1019021 for RFD 110 Series)

LIMITED TWIN DISC GENERAL WARRANTY, LIMITATIONS OF REMEDIES AND LIMITATION OF OTHER WARRANTIES

A. Twin Disc, Incorporated warrants all assembled products and parts (except component products or parts on which written warranties are issued by the respective manufacturers thereof and are furnished to the original customer, as to which Twin Disc, Incorporated makes no warranty and assumes no liability) against defective materials or workmanship. For products and parts other than Rockford power take-offs, such warranty shall extend for a period of twenty-four (24) months from the date of original shipment by Twin Disc, Incorporated to the original customer, but not to exceed twelve (12) months of service or two thousand (2,000) hours of service, whichever occurs first. This is the only warranty made by Twin Disc, Incorporated and is in lieu of any and all other warranties, express or implied, including the warranties of merchantability and fitness for a particular purpose and no other warranties are implied or intended to be given by Twin Disc, Incorporated. The original customer does not rely upon any tests or inspections by Twin Disc, Incorporated or on Twin Disc, Incorporated's application engineering.

B. In consideration of the Limited Twin Disc General Warranty (hereafter called warranty) and price Twin Disc,

Incorporated charges (which reflects Twin Disc, Incorporated's limited liability), the exclusive remedy provided by Twin Disc, Incorporated whether arising out of warranty within the applicable warranty period as specified, or otherwise (including tort liability), shall at the sole option of Twin Disc, Incorporated be either the repair or replacement of any Twin Disc, Incorporated part or product found by Twin Disc, Incorporated to be defective (or equivalent credit). Under no circumstances, including a failure of the exclusive remedy, shall Twin Disc, Incorporated be liable for economic loss, consequential, punitive or incidental damages. The above warranty and remedy are subject to the following terms and conditions:

1. Complete parts or products upon request must be returned transportation prepaid and also the claims submitted to Twin Disc, Incorporated within sixty (60) days after completion of the in warranty repair.

2. The warranty is void if, in the opinion of Twin Disc, Incorporated, the failure of the part or product resulted from abuse, neglect, improper maintenance or accident.

3. The warranty is void if any modifications are made to any product or part without the prior written consent of Twin Disc, Incorporated.

4. The warranty is void unless the product or part is properly transported, stored and cared for from the date of shipment to the date placed in service.

5. The warranty is void unless the product or part is properly installed and maintained within the rated capacity of the product or part with installations properly engineered and in accordance with the practices, methods and instructions approved or provided by Twin Disc, Incorporated.

6. The warranty is void unless all required replacement parts or products are of Twin Disc origin or are Twin Disc authorized replacement parts, and otherwise identical with components of the original equipment. Replacement parts or products not of Twin Disc origin are not warranted by Twin Disc, Incorporated.

C. As consideration for this warranty, the original customer and subsequent purchaser agree to indemnify and hold Twin Disc, Incorporated harmless from and against all and any loss, liability, damages or expenses for injury to persons or property, including without limitation, the original customer's and subsequent purchaser's employees and property, due to their acts or omissions or the acts or omissions of their agents, and employees in the installation, transportation, maintenance, use and operation of said equipment.

D. Only a Twin Disc, Incorporated authorized factory representative shall have authority to assume any cost or expense in the service, repair or replacement of any part or product within the warranty period, except when such cost or expense is authorized in advance in writing by Twin Disc, Incorporated.

E. Twin Disc, Incorporated reserves the right to improve the product through changes in design or materials without being obligated to incorporate such changes in products of prior manufacture. The original customer and subsequent purchasers will not use any such changes as evidence of insufficiency or inadequacy of prior designs or materials.

F. If failure occurs within the warranty period, and constitutes a breach of warranty, repair or replacement parts will be furnished on a no charge basis and these parts will be covered by the remainder of the unexpired warranty which remains in effect on the complete unit.

*Note The Above constitutes the basic Twin Disc, Incorporated General Limited Warranty and may be supplemented by additional published warranty terms dependent upon the product involved. Supplementary warranty terms are available upon request.

December 14, 2007 TDWP0001 rev 2008


Notes

7

Twin Disc, Incorporated Table of Contents

Power Take-Off Service Manual #1022762

Table of ContentsIntroduction ...........................................................11

General Information ............................................................................. 11Replacement Parts ..............................................................................12Preventive Maintenance/Troubleshooting .........................................13Safety ....................................................................................................14Sources of Service Information ..........................................................15Warranty ...............................................................................................16

Description and Specifications ...........................17General Information .............................................................................17Finding the Twin Disc Power Take-Off Model and Serial Number ...18Identifying the Twin Disc Power Take-off From Its Model Number .19Twin Disc Power Take-Off Reference Listing ....................................20Twin Disc Power Take-Off Reference Listing (continued) .................21Twin Disc Power Take-Off Reference Listing (continued) .................22Twin Disc Power Take-Off Reference Listing (continued) .................23Identifying the SAE Housing Size ......................................................24Specifications ......................................................................................25Twin Disc PTO Support Plate Specifications ....................................31Wear Limits ...........................................................................................32Torque Values for Fasteners ...............................................................36

Installation .............................................................39Installation Tips ....................................................................................39Prior to Installation (Ref: SAE J1033 and J617) ................................44Drive Ring Installation .........................................................................48Ball-Type Pilot Bearing Installation ....................................................49Roller-Type Pilot Bearing Installation ................................................50PTO Installation to Engine or Driving Member .................................52Hand Lever Position for Twin Disc Power Take-Offs ........................54Model SPE111 and SPE211 Arm Adjustment Procedure ..................55Position and Measure Alignment of the Sheave ...............................56Allowable Side Loads ..........................................................................57Alignment - U-Joint-Type Installation ................................................76Setting Up Air Engagement on Twin Disc Power Take Offs .............78

8

Twin Disc, IncorporatedTable of Contents


Operation ...............................................................81General Information .............................................................................81Clutch Engagement Procedure ..........................................................83

Maintenance ..........................................................85Maintenance Tips .................................................................................85Lubrication ...........................................................................................88Clutch Adjustment ...............................................................................91Friction Plate Replacement .................................................................93Field Adjustment - Tapered Roller Bearing End Play (side-loaded

pto applications) .............................................................................94Field Adjustment - Tapered Roller Bearing End Play (in-line pto ap-

plications) ........................................................................................95

Disassembly..........................................................97Power Take-Off Removal From The Engine ......................................98Torsion Control Spring Removal (model RB211 only) .....................99Clutch/Drive Spider Removal ...........................................................100Clutch Disassembly ...........................................................................102Bronze Collar Disassembly .............................................................102Ball Bearing Collar Disassembly ......................................................102Remove the Operating Shaft and Throwout Yoke ..........................104Clutch Shaft and Housing Disassembly - Configuration A ............106Clutch Shaft and Housing Disassembly - Configuration B............107Clutch Shaft and Housing Disassembly - Configuration C............109Clutch Shaft and Housing Disassembly - Configuration D............ 111Clutch Shaft and Housing Disassembly - Configuration E ............ 113Clutch Shaft and Housing Disassembly - Configuration F ............ 115Clutch Shaft and Housing Disassembly - Configuration G ........... 117

9

Twin Disc, Incorporated Table of Contents


Cleaning and Inspection ....................................119Cleaning and Inspection ................................................................... 119

Assembly.............................................................123Clutch Assembly ................................................................................124Clutch Shaft and Housing Assembly - Configuration A .................136Clutch Shaft and Housing Assembly - Configuration B .................143Clutch Shaft and Housing Assembly - Configuration C .................147Clutch Shaft and Housing Assembly - Configurations D, E & F ...157Clutch Shaft and Housing Assembly - Configuration G ................170Install the Operating Shaft and Throwout Yoke. .............................175PTO Final Assembly ..........................................................................176

Illustrations .........................................................183List of Illustrations .............................................................................183Parts Identification List - SP111, SPE111, SP211, SPE211, SP311,

RFD111, RFD211, RB111, RB211 and RB11PM Series ...............184Parts Identification List - SP111, SPE111, SP211, SPE211, SP311,

RFD111, RFD211, RB111, RB211 and RB11PM Series ................185Exploded View (SP111 and SP211 Series Clutches) .....................186Exploded View (SP111C016 and SP211C022 Clutches) ...............187Exploded View (Configuration A) .....................................................188Exploded View (Configuration B) .....................................................189Exploded View (Configuration C) .....................................................190Exploded View (Configuration D) .....................................................191Exploded View (Configuration E) .....................................................192Exploded View (Configuration F) .....................................................193Exploded View (Configuration G) .....................................................194Exploded View (SPE111 and SPE211 Series Throwout Mechanism) ..195

10

Twin Disc, IncorporatedTable of Contents


Engineering Drawings ........................................197SP111P203 Sheet 2 of 2 .....................................................................199SP111P204 Sheet 2 of 2 (Typical Configuration A) .........................200SP111P206 Sheet 2 of 2 (Typical Configuration B) .........................201SP111P325 Sheet 2 of 2 .....................................................................202SP211P101 Sheet 2 of 2 .....................................................................203SP211P203 Sheet 2 of 2 .....................................................................204SP211P204 Sheet 2 of 2 (Typical Configuration C) .........................205SP211P205 Sheet 2 of 2 .....................................................................206SPE211P213 Sheet 2 of 2 ..................................................................207SP211P225 Sheet 2 of 2 .....................................................................208SP311P101 Sheet 2 of 2 (Typical Configuration D) .........................209SP311P301 Sheet 2 of 2 (Typical Configuration E) .........................210SP311P306 Sheet 2 of 2 (Typical Configuration F) ......................... 211SP111C016 Sheet 2 of 2 .....................................................................212SPE211C015 Sheet 2 of 2 ..................................................................213RB111P101 Sheet 2 of 2 ....................................................................214RB211P201 Sheet 2 of 2 ....................................................................215XA7518 (Typical Configuration G) ....................................................216

11

Twin Disc, Incorporated Introduction


Introduction

General Information

This publication provides the information necessary for the operation and maintenance of the Twin Disc, Incorporated equipment specified on the cover of this manual. Specific engineering details and performance characteristics can be obtained from the Product Service Department of Twin Disc, Incorporated, Racine, Wisconsin, USA.

Operation and maintenance personnel responsible for this equipment should have this manual at their disposal and be familiar with its contents. Applying t he information in the manual will result in consistent performance from the unit and help reduce downtime.

12

Twin Disc, IncorporatedIntroduction


Replacement Parts

Parts Lists

See the engineering assembly drawings in Engineering Drawings and parts identification and exploded views in the Illustration section to facilitate ordering spare or replacement parts.

Ordering Parts

All replacement parts or products (including hoses and fittings) must be of Twin Disc origin or equal, and otherwise identical with components of the original equipment. Use of any other parts or products will void the warranty and may result in malfunction or accident, causing injury to personnel and /or serious damage to the equipment.

Renewal parts and service parts kits may be obtained from any authorized Twin Disc distributor or service dealer.

Parts Shipment

Furnish the complete shipping information and postal address. All parts shipments made from the factory will be FOB factory location, USA. State specifically whether the parts are to be shipped by freight, express, etc. If shipping instructions are not specified, the equipment will be shipped the best way, considering time and expense. Twin Disc, Incorporated will not be responsible for any charges incurred by this procedure.

Twin Disc, Incorporated having stipulated the bill of material number on the unit’s nameplate absolves itself of any responsibility resulting from any external, internal or installation changes made in the field without the express written approval of Twin Disc. All returned parts, new or old, emanating from any of the above-stated changes will not be accepted for credit. Furthermore, any equipment which has been subjected to such changes will not be covered by a Twin Disc warranty.

13



Preventive Maintenance/Troubleshooting

Frequent reference to the information provided in this manual regarding daily operation and limitations of this equipment will assist in obtaining trouble-free operation. Schedules are provided for the recommended maintenance of the equipment and, if observed, minimum repairs (aside from normal wear) will result.

In the event a malfunction does occur, a troubleshooting table is provided to help identify the problem area and lists information that will help determine the extent of the repairs necessary to get a unit back into operation.

Lifting Bolt Holes

Most Twin Disc products have provisions for attaching lifting bolts. The holes provided are always of adequate size and number to safely lift the Twin Disc product.

These lifting points must not be used to lift the complete power unit. Lifting excessive loads at these points could cause failure at the lift point (or points) and result in damage or personal injury.

Select lifting eyebolts to obtain maximum thread engagement with bolt shoulder tight against housing. Bolts should be near but should not contact bottom of bolt hole.

14



Safety

General

Safe practices must be employed by all personnel operating and servicing this unit. Twin Disc, Incorporated will not be responsible for personal injury resulting from careless use of hand tools, lifting equipment, power tools, or unaccepted maintenance/operating practices.

Important Safety Notice

Because of the possible danger to person(s) or property from accidents which may result from the use of manufactured products, it is important that correct procedures be followed. Products must be used in accordance with the engineering information specified. Proper installation, maintenance, and operation procedures must be observed. Inspection should be made as necessary to assure safe operations under prevailing conditions. Proper guards and other suitable safety codes should be provided. These devices are neither provided by Twin Disc, Incorporated nor are they the responsibility of Twin Disc, Incorporated.

15



Sources of Service Information

Each series of manuals issued by Twin Disc, Incorporated is current at the time of printing. When required, changes are made to reflect advancing technology and improvements in state-of-the-art.

Individual product service bulletins are issued to provide the field with immediate notice of new service information.

For the latest service information on Twin Disc products, contact any Twin Disc distributor, or contact the Product Service Department, Twin Disc, Incorporated, Racine, Wisconsin 53405-3698, USA by e-mail at [email protected].

Contact information for Authorized Twin Disc Distributors and Service Dealers can be found on the Twin Disc Web site at: http://www.twindisc.com.

16



Warranty

Equipment for which this manual was written has a limited warranty. For details of the warranty, refer to the warranty statement at the front of this manual.

17

Twin Disc, Incorporated Description and Specifications


Description and Specifications

General Information

The SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 Series Twin Disc Power Take-Offs are engine-mounted power take-offs that use cast iron one-piece or two-piece housings and contain an integral clutch 11 1/2 inches in diameter. The engine drives the clutch through a drive ring that is bolted to the engine flywheel and connected to the clutch through internal teeth that mesh with external teeth on the clutch friction plate(s). Clutch engagement and disengagement for most units is accomplished by use of the external hand lever assembly. Some units may use other actuation methods.

The RB111, RB211 and RB11PM Series Twin Disc Power Take-Offs are engine-mounted power take-offs that use cast iron one-piece or two-piece housings and contain a drive spider or torsional spring coupling mounted on the input end of the drive shaft. Model RB units are direct drive units; they contain no clutch. The engine drives the drive spider through a drive ring that is bolted to the engine flywheel and connected to the drive spider through internal teeth that mesh with rubber blocks mounted on external teeth of the drive spider. Torsional spring couplings are bolted directly to the flywheel. RB11PM units have a pump mount at the rear of the main housing.

Main bearings are lubricated and cooled with oil or grease, depending upon the design specifications. Most units use pilot bearings that are pre-lubricated and sealed for life, although some may require periodic relubrication. Those that require periodic relubrication are lubricated through a grease fitting located in the output end or side of the clutch shaft.

SPE models are designed with release mechanism features and a positive clearance mechanism to provide “extended service” and “limited attendance” advantages.

18

Twin Disc, IncorporatedDescription and Specifications


Finding the Twin Disc Power Take-Off Model and Serial Number

The nameplate identifies the model, bill of material (BOM) and the serial number of the unit. These numbers are necessary to identify the correct parts for your Power Take-Off.

BOM No.S/N

Model No.

Information and instructionsspecific to each individual PTO.

Figure 1. Representative Instruction Plate

19



Identifying the Twin Disc Power Take-off From Its Model Number

Typical Model Identification Number: SP-111HP-3

SP 1 11 HP - 3

A B C D E{ { { { {

A. Indicates the type of clutch. SP = Counter balanced, toggle action overcenter clutch SPE = SP model for extended service RFD = Rockford design with combination Twin Disc and Rockford

design components RB = Rubber block drive

B. Indicates the number of friction plates in the clutch. 1 = 1 clutch friction plate, or (RB 111 & RB11PM Series only, 1 drive spider) 2 = 2 clutch friction plates, or (RB 211 Series only, 1 torsional spring coupling) 3 = 3 clutch friction plates

C. Indicates the nominal size of the clutch friction plates (inches). 11 = 11.5” diameter (nominal), measured just inside the root of the

teeth (RB units) = diameter (nominal) of the drive spider or torsional spring

coupling

D. Indicates the housing design. P = standard (grease lubricated main bearings) HP = Heavy Duty (grease lubricated main bearings) OP = oil lubricated main bearings IL = main bearings for in-line duty only

E. Indicates the S.A.E. housing size. 1 = SAE # 1 housing 2 = SAE # 2 housing 3 = SAE # 3 housing

20



Twin Disc Power Take-Off Reference Listing

The Twin Disc Power Take-Off Reference Listing on the following pages refers to various basic design configuration designations used for the main bearing housing. These designations are used primarily to simplify explanation of the disassembly and assembly procedures in this manual. The following chart provides a general description of the basic features of each configuration and also provides general information regarding each Twin Disc Power Take-Off. However, always refer to a current BOM for your specific power take-off to insure that the most up-to-date information is being used.

A B C D E F GMain Housing and Bearing Carrier

1-piece X X 2-piece (Separate Items) X X X X X

Assembly of Main Bearings From opposite ends of shaft X X X X XBoth from same end of shaft X X

Retention of Main Bearing(s) Retained by bearing retainer X X X X XRetained by lock nut X Retained by snap rings X

Bearing Retainer Threaded X XBolted X X XNeither or none X X

Retention of Bearing Retainer Retained by lock tab X XRetained by bolts X X XRetained by snap ring(s) X Also a rear bearing retainer X

Main Bearing Adjustment Rotate bearing retainer X XShims X XNo adjustment X X X

Oil Seals in Housing or Brg. Carrier X X XWear Sleeve(s) on Shaft XPump Drive Output X

ConfigurationFeature

21



Twin Disc Power Take-Off Reference Listing (continued)

Gre

ase

Oil

Bro

nze

Bal

l

Cas

t Iro

n

Nod

ular

Main BearingLubrication

ThrowoutCollar Type

Pilot BearingType

Drive RingType

Main BearingHousing

Configuration

Bal

l

Rol

ler

FacingType

Split

Solid

SP111HP1 SP111P101 x x X X X ASP111HP1 SP111P102 X X X X ASP111HP1 SP111P103 X X X X X ASP111HP1 SP111P104 X X X X ASP111HP1 SP111P106 X X X X X ASP111HP1 SP111P107 X X X X X ASP111HP2 SP111P201 X X X X X ASP111HP2 SP111P202 X X X X ASP111HP2 SP111P203 X X X ASP111HP2 SP111P204 X X X X ASP111P2 SP111P205 X X X X X ASP111P2 SP111P206 X not used X X BSP111P2 SP111P207 X X X X X ASP111P2 SP111P208 X X X X X ASP111P2 SP111P210 X X X X X ASP111P2 SP111P211 X X X X X ASP111HP2 SP111P212 X X X X X ASP111HP3 SP111P301 X X X X X ASP111HP3 SP111P303 X X X X X ASP111P3 SP111P304 X X X X X ASP111HP3 SP111P305 X X X X X ASP111HP3 SP111P306 X X X X X ASP111HP3 SP111P307 X X X X X ASP111P3 SP111P309 X X X X X ASP111P3 SP111P310 X X X X X ASP111HP3 SP111P312 X X X X X ASP111HP3 SP111P314 X X X X X ASP111HP3 SP111P315 X X X X X ASP111HP3 SP111P319 X X X X X ASP111HP3 SP111P321 X X X X X ASP111HP3 SP111P322 X X X X X ASP111HP3 SP111P323 X X X X X ASPE111HP3 SP111P325 X spcl spcl X X X ASP111HP3 SP111P326 X X X X X ASP111HP3 SP111P328 X X X X X ASP111HP3 SP111P330 X X X X X ASP111HP3 SP111P331 X X X X X ASP111HP3 SP111P332 X X X X X ASP111HP3 SP111P333 X X X X X ASP111HP3 SP111P334 X X X X X ASP111HP3 SP111P335 X X X X X ASP111HP3 SP111P336 X X X X A

Supp

ort P

late

Req

’d

ModelNumber BOM

22




Gre

ase

Oil

Bron

ze

Ball

Cast

Iron

Nodu

lar

Main BearingLubrication

ThrowoutCollar Type

Pilot BearingType

Drive RingType

Main BearingHousing

Configuration

Ball

Rolle

r

FacingType

Split

Solid

Supp

ort P

late

Req

’d

SP211HP1 SP211P101 X X X X X ASP211HP1 SP211P102 X X X X ASP211HP2 SP211P201 X X X X X ASP211HP2 SP211P202 X X X X ASP211HP2 SP211P203 X X X X X ASP211OP2 SP211P204 X X X X X X CSP211P2 SP211P205 X X not used X X BSP211HP2 SP211P206 X X X X X ASP211OP2 SP211P207 X X X X X X CSP211OP2 SP211P209 X X X X X X CSPE211HP2 SP211P213 X spcl spcl X X X X ASP211HP2 SP211P216 X X X X X ASPE211HP2 SP211P220 X spcl spcl X X X X ASP211P2 SP211P221 X X not used X BSP211HP2 SP211P224 X X X X X ASP211P2 SP211P225 X X not used X X BSP211OP2 SP211P226 X X X X X X CSP211HP2 SP211P227 X X X X X ASP211HP3 SP211P301 X X X X X ASP211HP3 SP211P302 X X X X X ASP211HP3 SP211P304 X X X X X ASP211HP3 SP211P305 X X X X X ASP211HP3 SP211P306 X X X X X ASP211HP3 SP211P307 X X X X X ASP211HP3 SP211P309 X X X X X ASP211HP3 SP211P312 X X X X X ASP211HP3 SP211P314 X X X X X ASP211HP3 SP211P315 X X X X X ASP211HP3 SP211P316 X X X X ASP211HP3 SP211P317 X X X X ASP211HP3 SP211P318 X X X X X ASP211HP3 SP211P319 X X X X X ASP211HP3 SP211P320 X X X X X ASP211HP3 SP211P321 X X X X X ASP211HP3 SP211P322 X X X X X ASP311IL1 SP311P101 X X not used X X X DSP311P2 SP311P201 X X X X X X ESP311P3 SP311P301 X X X X X X ESP311P3 SP311P303 X X X X X X ESP311P3 SP311P304 X X X X X X ESP311P3 SP311P305 X X X X X ESP311OP3 SP311P306 X X X X X X F

ModelNumber BOM

23




Gre

ase

Oil

Bro

nze

Bal

l

Cas

t Iro

n

Nod

ular

Main Bearing Lubrication

ThrowoutCollar Type

Pilot Bearing Type

Drive Ring Type

Main Bearing Housing

Configuration

Bal

l

Rol

ler

FacingType

Split

Solid

Supp

ort P

late

Req

’d

ModelNumber BOM

RFD211P2 TR411127 X X X X X ARFD211P2 TR411127A X X X X X ARFD211P2 TR411127B X X X X ARFD111HP3 TR434510 X X X X X ARFD111HP3 TR434510A X X X X X ARFD111HP3 TR434510B X X X X ARFD111HP3 TR434510C X X X X X ARFD211P3 TR434845 X X X X X ARFD211P3 TR434845A X X X X X ARFD211P3 TR434845B X X X X A

Gre

ase

Oil

Bro

nze

Bal

l

Cas

t Iro

n

Alu

min

umMain Bearing Lubrication

ThrowoutCollar Type

Pilot Bearing Type

Drive Ring Type

Main Bearing Housing

Configuration

Bal

l

Rol

ler

FacingType

Split

Solid

Supp

ort P

late

Req

’dModel

Number BOM

Nod

ular

RB111P1 RB111P101 X not used X X not used ARB111P3 RB111P301 X not used X X not used ARB111P3 RB111P302 X not used X X not used ARB211P2 RB211P201 X not used X not used not used ARB11PM 38253 X not used X X not used G

24



Identifying the SAE Housing Size

A

B

D

C

Table 1. SAE Housing Identification

1 511.18 20.125 552.4 21.75 530.22 20.875 12 12.29 .484

2 447.68 17.625 489.0 19.25 466.72 18.375 12 10.99 .433

3 409.58 16.125 450.8 17.75 428.62 16.875 12 10.99 .433

SAEHousing

Size

AHousing

Pilot Diameter

BHousing

Flange O.D.

CBolt Circle Diameter

DBolt Holes

Qty.Dia.

mm. inches mm. inches mm. inches mm. inches

25



Specifications

Maximum Safe Operating Speeds for Twin Disc Power Take-offs

(Refer to BOM and Twin Disc Power Take-Off Reference Listing on previous pages.)

Table 2. Maximum Safe Operating Speeds

PTO Model SolidDrive Plate(s)

SplitDrive Plate

SolidDrive Plate(s)

SplitDrive Plate

SP111 Series Grease 2850 2200 3600 3200 n/aSPE111 Series Grease 2850 2200 3600 3200 n/aSP211 Series Grease 2850 2200 3500 3160 n/aSPE211 Series Grease 2850 2200 3500 3160 n/aSP211 Series Oil 2850 2200 3000 3000 n/aSP311 Series Grease 2850 2200 3500 3160 n/aSP311 Series Oil 2850 2200 3000 3000 n/aRFD111 Series Grease 2800 2800 2800 2800 n/aRFD211 Series Grease 2800 2800 2800 2800 n/aRB111 Series Grease n/a n/a n/a n/a 3000RB11PM Series Oil n/a n/a n/a n/a 3000RB211 Series Grease 3000 (Does not use a Drive Ring)

Cast Iron Drive Ring Steel or Nodular Drive RingAluminumDrive Ring

26



Pilot bearing position (If used)


Ball-TypeThe owner/operator is responsible for checking the flywheel to ensure that the pilot bearing is installed on the shaft with sufficient clearance without bottoming in the flywheel bore. The depth of the pilot bore from the flywheel housing face to shoulder on the flywheel pilot flange is 100.07 mm. (3.94 in.).

Roller-Type

Table 3. Roller-Type Pilot Bearing Dimensions

SP111HP1 M2467 72mm. (2.83 in.) 30.07 mm. (1.184 in.) 0.5mm. (0.02 in.)

SPE111HP3 M2529 72mm. (2.83 in.) 30.07 mm. (1.184 in.) 0.5mm. (0.02 in.)

SPE211HP2 M2713 72mm. (2.83 in.) 30.07 mm. (1.184 in.) 0.5mm. (0.02 in.)

SP211OP2 M2713 72mm. (2.83 in.) 30.07 mm. (1.184 in.) 0.5mm. (0.02 in.)

Bearing Bearing O.D.Bearing Nominal

Width (C)(B)

+/- tolerance

27



Tapered Roller Bearing End Play

Table 4. Recommended Bearing End Play for Tapered Roller Bearings Used in Side-Loaded applications

SP111P Series .10 - .18 .004 - .007SP111HP Series .10 - .18 .004 - .007SP111OP Series .10 - .18 .004 - .007RFD111HP Series .10 - .18 .004 - .007SP211P Series .10 - .18 .004 - .007SP211HP Series .10 - .18 .004 - .007SPE211HP Series .10 - .18 .004 - .007SP211OP Series .10 - .18 .004 - .007RFD211P Series .10 - .18 .004 - .007SP311P Series .15 - .25 .006 - .010SP311OP Series .15 - .25 .006 - .010SP311IL Series n/a (Ball Bearing) n/a (Ball Bearing)RB111P Series .10 - .18 .004 - .007RB211P Series .10 - .18 .004 - .007RB11PM Series n/a (Ball Bearing) n/a (Ball Bearing)

Model Number mm.

Recommended End Play

inches

28



Table 5. Recommended Bearing End Play for Tapered Roller Bearings Used in In-Line applications

SP111P Series .10 - .18 .004 - .007SP111HP Series .10 - .18 .004 - .007SP111OP Series .10 - .18 .004 - .007RFD111HP Series .10 - .18 .004 - .007SP211P Series .18 - .23 .007 - .009SP211HP Series .18 - .23 .007 - .009SPE211HP Series .18 - .23 .007 - .009SP211OP Series .18 - .23 .007 - .009RFD211P Series .18 - .23 .007 - .009SP311P Series .23 - .30 .009 - .012SP311OP Series .23 - .30 .009 - .012SP311IL Series n/a (Ball Bearing) n/a (Ball Bearing)RB111P Series .10 - .18 .004 - .007RB211P Series .18 - .23 .007 - .009RB11PM Series n/a (Ball Bearing) n/a (Ball Bearing)

Model Number mm.

Recommended End Play

inches

29



Engagement force on the operating shaft

Table 6. Torque at operating shaft to engage clutch

SP111 Series 144 -191 107 - 141

SPE111 Series 144 -191 107 - 141

RFD111 Series 144 -191 107 - 141

SP211 Series 181 - 240 133 - 177

SPE211 Series 181 - 240 133 - 177

RFD211 Series 181 - 240 133 - 177

SP311 Series 232 - 308 171 - 227

Model Peak Torque on Operating ShaftNm Lb.-Ft.

Filling the Main Bearing Cavity during initial assembly.


Grease Lubrication:Hand-pack the bearings before assembly. Hand-packing requires that the roller elements and bearing races be coated with grease. After assembly, add grease through the grease fitting until grease escapes from the outboard labyrinth seal all around the shaft. Do Not Overfill. Always rotate the shaft while adding grease to the bearing cavity.

Oil Lubrication SP211OP and SPE211OP Series:Fill with oil through the fitting at the top of the bearing carrier until the oil level registers full on the oil level gauge.

Oil Lubrication SP311OP Series (BOM SP311P306, for example):Oil is supplied through a hose connected to the (orifice) fitting at the top of the bearing carrier. Oil is supplied whenever the engine is running. Oil drains from the bearing carrier through a hose connected at the bottom of the bearing carrier.

Oil Lubrication RB11PM Series:Fill with oil through the oil fill cup until the oil level is at the bottom of the oil level check plug.

30



Filling the Main Bearing Cavity during periodic maintenance.

Refer to the information contained in the Maintenance section of this manual.

PTO Deflection

PTO deflection due to loads imposed by the application should not exceed 0.254 mm (0.010 in.). Deflection should be measured at the support plate pilot with the dial indicator base mounted on a rigid part of the engine. See the illustration in Installation Tips in the Installation section of this manual.

31



Twin Disc PTO Support Plate Specifications

Twin Disc, Inc. requires that a support plate be used with some SP211 and SP311Series models.

G

B(diameter)

(angle tofirst hole)

D

(Holes)E (Qty.)F (dia.)

43.18 cm. (17.0 in.)

Shim towithin.12 cm.(.005 in.)

A(diameter)

C(radius)

Figure 2. Typical Support Plate Illustration

Table 7. Support Plate Dimensions

PTOModel

ABore Dia.

+.127/.025mm(+.005/+.001”)

BBolt

Circle (Dia.)

CRadius

DDegree

EHole

Quantity

FHole

Diameter

GRecommended

Thickness

SP211OP 45° 8 12.70 mm.(0.500 in.)

SP311P 30° 6 12.70 mm.(0.500 in.)

127.00 mm.(5.00 in.)

225.43 mm.(8.875 in.)

190.5 mm.(7.50 in.)

SP311OP 30° 6

17/32 in.

12.70 mm.(0.500 in.)

165.86 mm.(6.53 in.)

307.98 mm.(12.125 in.)

273.05 mm.(10.75 in.)

17/32 in.

17/32 in.225.43 mm.(8.875 in.)

190.5 mm.(7.50 in.)

SP311IL 30° 6 12.70 mm.(0.500 in.)

17/32 in.225.43 mm.(8.875 in.)

190.5 mm.(7.50 in.)

127.00 mm.(5.00 in.)

127.00 mm.(5.00 in.)

Note: One possible mounting method provides installation ease. Use angle iron to couple the support plate to the engine frame.

32



Wear Limits

Table 8. Wear Limits - Housing/Bearing Carrier Bore Dimensions(Refer to BOM for the Bearing Carrier/Housing Part Number used in your PTO)

8247 110.025 4.3317 n/a n/a 3 8251 110.025 4.3317 n/a n/a 3 8252 110.025 4.3317 n/a n/a 3 8252B 110.025 4.3317 n/a n/a 3 8252J 110.025 4.3317 n/a n/a 3 8506B 82.626 3.253 n/a n/a 6 9682 112.748 4.4385 n/a n/a 3 9682C 112.748 4.4385 n/a n/a 3 9682E 112.748 4.4385 n/a n/a 3 9682F 112.748 4.4385 n/a n/a 3 9700 112.748 4.4385 n/a n/a 3 9702 110.025 4.3317 n/a n/a 3 9703 110.025 4.3317 n/a n/a 3 9977A 112.748 4.4385 n/a n/a 3 9977C 112.748 4.4385 n/a n/a 3 A5195 152.425 6.0010 n/a n/a 1 A7547 136.710 5.3823 136.576 5.377 5 B5310 95.024 3.7411 127.051 5.002 7 B5470A 115.006 4.5278 n/a n/a 4 1016518 160.065 6.3017 160.065 6.3017 2 02004245 109.995 4.3305 n/a n/a 3

HousingPart Number

Bearing CarrierPart Number

Bore Dim. A(Maximum)

mm. inches

IllustrationNumber

Bore Dim. B(Maximum)

mm. inches

33



1

A

B

A

A

A

B

3

4

5

2

A 7B

6A

A

Figure 3. Housing/Bearing Carrier Illustrations

34



Table 9. Wear Limits - Shaft Dimensions(Refer to BOM for the Clutch Shaft Part Number used in your PTO)

ShaftPart

Number

Pilot Bearing Journal (Min.)

mm. inches

Illus.Number

Front & Rear Seal Journals

(Min.)mm. inches mm. inches mm. inches

Main Bearing Journal Dim. A

(Min.)

Main Bearing Journal Dim. B

(Min.)

A5188 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188A 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1

A5188AS 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188AZ 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188BQ 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188BR 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188BU 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188BW 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188BX 24.999 0.9842 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188BY 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A5188BZ 29.997 1.181 57.188 2.2515 57.188 2.2515 n/a n/a 1A5188CA 29.997 1.181 57.188 2.2515 57.188 2.2515 n/a n/a 1A5188CB 29.997 1.181 63.538 2.5015 63.541 2.5016 n/a n/a 1

A6691 29.997 1.181 66.713 2.6265 66.713 2.6265 n/a n/a 1A6691AC 29.997 1.181 66.713 2.6265 66.713 2.6265 n/a n/a 1A6691AU 34.999 1.3779 66.713 2.6265 66.713 2.6265 n/a n/a 1A6691AV 29.997 1.181 66.713 2.6265 66.713 2.6265 n/a n/a 1A6691AW 29.997 1.181 66.713 2.6265 66.713 2.6265 n/a n/a 1A6691D 29.997 1.181 66.713 2.6265 66.713 2.6265 n/a n/a 1 A6711 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1

A6711L 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A6711R 29.997 1.181 63.538 2.5015 63.538 2.5015 n/a n/a 1A7551 not used 76.238 3.0015 71.478 2.8141 n/a n/a 2A7552 not used 76.238 3.0015 71.478 2.8141 n/a n/a 2

B5027AP 29.997 1.181 95.301 3.752 95.301 3.752 n/a n/a 1B5027AT not used 90.030 3.545 90.030 3.545 n/a n/a 4B5027AU 29.997 1.181 95.301 3.752 95.301 3.752 n/a n/a 1B5027AY 29.997 1.181 95.301 3.752 95.301 3.752 91.999 3.622 1B5471B 29.997 1.181 70.025 2.7569 70.025 2.7569 66.650 2.624 3B5964A 29.997 1.181 60.002 2.3623 n/a n/a n/a n/a 5

35



1

2

3

4

5

Main Bearing Journal B

Main Bearing Journal A

Pilot Bearing Journal





Pilot Bearing JournalRear Seal Journal

Front Seal Journal


Main Bearing Journal AMain Bearing Journal A


Figure 4. Clutch Shaft Illustrations

36



Torque Values for Fasteners

Note: The tables below provide information for several different types of fasteners: U.S. Standard Fine and Coarse Thread Capscrews, Bolts, and Nuts; Metric Coarse Thread Capscrews, Bolts, and Nuts; Tapered Pipe Plugs (with thread lubricant); Straight Threaded Tube Fittings, Hose Fittings, and O-ring Plugs. Be sure to use the appropriate table to obtain the correct torque value.

Note: All threads and bearing face to be lubricated with light oil film prior to assembly.

Table 10. U.S. Standard Fine and Coarse Thread Capscrews, Bolts, and Nuts

37



Table 11. Metric Coarse Thread Capscrews, Bolts, and Nuts

Table 12. Tapered Pipe Plugs (with thread lubricant)

38



Table 13. Straight Threaded Tube Fittings, Hose Fittings, and O-ring Plugs

39

Twin Disc, Incorporated Installation


Installation

Installation Tips

Tapered Roller Bearing Adjustment

1. Tapered roller bearing end play adjustment is different in SP211,SP311,RFD211,RB111andRB211SeriesPowerTake-Offsforside load applications than it is for in-line applications. Insure that theadjustmentiscorrectfortheapplication.

2. AllSP111,SPE111,SP211,SPE211,SP311,RFD111,RFD211,RB111andRB211SeriesPowerTake-OffsaremanufacturedatTwinDisc’sfactorywiththetaperedrollerbearingendplayadjustedforside-load application.

3. TestsandcontrolledstudiesindicatethatthetaperedrollerbearingendplayadjustmentforSP111,SPE111,RFD111,RB111andRB211SeriesPower-Take-OffsdoesnotneedtobechangedtousethePTOforin-lineapplications.Noreadjustmentisnecessary.

4. TaperedrollerbearingendplayinSP211,SPE211,SP311,RFD111andRFD211SeriesPowerTake-Offsusedforin-lineapplicationsmustbe adjusted to specifications shown in Tapered Roller Bearing End Play in the Description and Specifications section of this manual.

a. For model SP211, SPE211, SP311, RFD211, RB111 and RB211 Series PTOs that are rebuilt or remanufactured:Adjusttheend play to proper specifications for in-line applications at the time of assembly. Follow instructions contained in theAssemblysectionofthismanual.

40

Twin Disc, IncorporatedInstallation


b. For SP211, SPE211, SP311 and RFD211 Series PTOs manufactured in Twin Disc’s factory:Readjustthefactoryendplaysettingpriorto installationontheenginefor in-lineapplications.MostSP211,SPE211,SP311andRFD211SeriesPowerTake-Offshavea tagattached to thehousingwhichcontainsinstructionsthatmustbefollowed.Readjusttheendplaysettingasinstructed.

Figure 5. Factory Instruction Tag for End Play Adjustment

Alignment

5. The flywheel and flywheel housing alignment must be withinspecifications. Perform the measurements shown in Prior To InstallationinthisInstallationsection.

6. AvoidexcessivemisalignmentbetweentheengineandPTO.Checkthefollowingifabnormalwearofpartsexists:

a. Excessive loads tend to deflect parts to which PTOs are mounted.Adial indicatorcanbemountedonarigidpartoftheengineor independentlyon the foundation todeterminedeflection under actual operating conditions. See Support Plate, Belt or chain tension/Allowable Side Load PullsandDeflection Caused by Side Load Pulls in this Installationsection and information contained in the Description and Specifications sectionregardingtheseissues

b. Readingstakenbeforethedrive is installedwith theenginestandingstillandwhenunderoperatingconditions(withtheengineoffandallbelts,chains,driveshaftsand/orsupportplatesattached and secured with bolts torqued to specifications) will indicate the extent of deflection. In no case should the deflection exceed 0.254 mm. (0.010 in.) (T.I.R.) at the bearing carrier.

Note: Thedialindicatorshouldneverbeappliedwiththeenginerunning.Thisisunsafeandcouldresultindamagetothedialindicator.

41



7. In a u-joint-type installation, to realize the longest possible life ofthe power take-off bearings, the best possible alignment must bemaintainedbetweenthecenterlineofthepowertake-offshaftandthecenterlineofthedrivenunitshaft.SeeinformationcontainedinAlignment-U-Joint-Type InstallationinthisInstallationsection.

8. Inside-loadinstallations,alignmentbetweenthedriveRanddriveNpulleysmustbecarefullyestablishedandmaintained.SeePosition and Measure Alignment of the SheaveinthisInstallationsection.

Drive Ring

9. Thedriveringmustbeproperlyinstalled.SeeinformationinDrive Ring InstallationinthisInstallationsection.

Pilot Bearings

10. Ball-typepilotbearingsandRoller-typepilotbearingsmustbeinstalledproperly.SeeBall-Type Pilot Bearing InstallationorRoller-Type Pilot Bearing InstallationinthisInstallationsection.

Support Plate

11. Whenmounting theengineandPowerTakeOff in themachine,acustomer-suppliedsupportplatemayberequiredtosupporttheoutputendoftheptohousing.Seetheinformationaboutcustomer-suppliedsupportplatesandTwin Disc PTO Support Plate Specificationscontained in the Description and Specifications section of thismanual.

Failure to follow this requirement may result in damage to the power take off or the engine flywheel housing.

Belt or chain tension/Allowable Side Load Pulls

12. Avoidexcessivetighteningofbeltsorchains.SeetheAllowable Side LoadtablesinthisInstallationsection.

13. Avoid excessively loose belts or chains. Belt tension or chainadjustment that is below specifications can cause belt/chain “whip” duringoperation, resulting in bearing failureand shortenedpowertake-offservicelife.

42



Deflection Caused by Side Load Pulls

14. PowerTake-OffdeflectionduetoloadsimposedbytheapplicationshouldnotexceedspecifiedlimitsshowninPTO DeflectionintheDescriptionandSpecificationssection.Deflectionshouldbemeasuredatthesupportplatelocationonthepowertake-off(ormainbearingareaofthehousingifnosupportplateisused).

Figure 6. Determining Deflection While Applying Side Loads

The dial indicator should not be applied while the unit is operating. This could result in damage to the dial indicator.

Lubrication

15. Verify that the PTO is properly lubricated prior to starting theengine.

a. Thethrowoutcollarislubricatedbygreasethroughagreasefittingontheoutsideofthemainhousing.

b. SP211OP,SP311OPandRB11PMSeriesmainbearingsarelubricatedbyoilcontainedinthemainbearingcavity.

43



c. AllotherSP111,SPE111,SP211,SPE211,SP311,RFD111,RFD211,RB111andRB211Seriesmainbearingsarelubricatedbygreasethroughagreasefittinginthehousingorbearingcarrier.

d. Thesealed-for-lifepilotbearingshouldnotbelubricatedduringservice.

e. Pilot bearings designed for periodic lubricationmust begreased.See LubricationintheMaintenancesectionformoreinformation.Improperlubricationwillresultinprematurefailureofcomponents.DONOTOVERGREASE!

Refer to theTwin Disc Power Take-Off Reference Listing andFilling the Main Bearing Cavity in theDescription andSpecifications section,LubricationintheMaintenancesectionandEngineering Drawingsnearthebackofthismanual.

Clutch Adjustment

16. VerifythattheclutchisadjustedaccordingtotheprocedureoutlinedinClutch AdjustmentintheMaintenancesection.Failuretodosowillresultinprematureclutchwearandfailure.

Note:TwinDiscwillnotberesponsibleforanydamageorinjuryresultingfromimproperadjustmentand/orlubrication.Thisincludesanyaccessorydrivesandloads.

Hand Lever Position

17. Proper hand lever position is required to obtain long service lifeof the throwoutbearing.SeeHand Lever Position for Twin Disc Power Take-Offs andModel SPE211 and SPE311 Arm Adjustment Procedure inthisInstallationsection.

Air Engagement Mechanisms

18. AirengagementmechanismsmustbeinstalledandadjustedproperlyforproperclutchactuationandlongservicelifeofthePTO.Nopreloadonthethrowoutbearingcanexisteitherinthefully-engagedorfully-releasedpositions,andtheairmechanismmustbeengineeredandinstalledtoprovideproperengagementforceandstroketoproperlyengageanddisengagetheclutch.SeeSetting Up Air Engagement on Twin Disc Power Take-Offs inthisInstallationsection.

44



Prior to Installation (Ref: SAE J1033 and J617)

RefertoIdentifying the SAE Housing SizeintheDescriptionand Specifications section of this manual.

Most Twin Disc products mount directly onto the flywheel of the engine. Flywheel-to-driven component interference is possible due to mismatch of components or other reasons. Therefore, engine crankshaft endplay as well as flywheel alignment check must be made before the driven component, the Power Take-Off, is installed.

After installation of the Power Take-Off, crankshaft end play should be measured again. End play at the second measurement should be the same as the first. A difference in these two end play measurements could be an indication of interference. Consequently, the Power Take-Off should be removed and the source of interference found and corrected.

Twin Disc will not be responsible for system damage caused by engine to Twin Disc match-up regardless of the cause of interference. This engine crankshaft end play check is considered mandatory.

Note: All measurements must be taken with the engine ormotor mounted on its supports after the flywheel and housinghavebeenthoroughlycleaned.

1. Measureandrecordtheenginecrankshaftormotorshaftendplayusingadialindicator.Recordthisvalue,asitwillbeusedlater._______

45



2. Bolt the indicator to the flywheel so the indicator is perpendicular to the flywheel housing face and the indicator stem rides on the flywheel housingface.

Figure 7. Checking Flywheel Housing Face

3. Rotatetheshaftthroughonentirerevolutionandnotetherunout.Thetotal indicator reading (T.I.R.) must not exceed:

SAE #1 Housing 0.30 mm. (0.012 in.) SAE #2 Housing 0.28 mm. (0.011 in.) SAE #3 Housing 0.25 mm. (0.010 in.)

Note: The flywheel and crankshaft of the engine must be held againsteitherthefrontorrearofthecrankshaftthrustbearing while the total indicator sweep (T.I.R.) is being made.

4. Readjust the indicator so the stem rides on the pilot bore of the flywheel housingface.

Figure 8. Checking Flywheel Housing Bore

46



5. Rotatetheshaftthroughoneentirerevolutionandnotetherunout.The total indicator reading (T.I.R.) should not exceed:

SAE #1 Housing 0.30 mm. (0.012 in.) SAE #2 Housing 0.28 mm. (0.011 in.) SAE #3 Housing 0.25 mm. (0.010 in.)

6. Remove the indicator base from the flywheel and bolt it to the flywheel housingface.Positiontheindicatorstemsothatitrideswherethedrive ring will set on the flywheel face.

Figure 9. Checking Driving Ring Surface of Flywheel

7. Rotatetheshaftthroughoneentirerevolutionandnotethefacerunoutof the flywheel. The total indicator reading (T.I.R.) must not exceed 0.01mm. (0.0005 in.) per 25.4 mm. (per inch) of flywheel diameter.

Note: The flywheel and crankshaft of the engine must be held againsteitherthefrontorrearofthecrankshaftthrustbearing while the total indicator sweep (T.I.R.) is being made.

8. Readjusttheindicatorstemsoitridesonthedrivingringpilotboreofthe flywheel.

Figure 10. Checking Driving Ring Pilot Bore of Flywheel

47



9. Rotatetheshaftthroughoneentirerevolutionandnotethedrivingringbore eccentricity. The total indicator reading (T.I.R.) must not exceed 0.13 mm. (0.005 in.).

10. Adjust the indicatorstemso that it rideson thepilotbearingborecavity.

Figure 11. Checking Pilot Bearing Bore of Flywheel

11. Rotatetheshaftthroughoneentirerevolutionandnotethepilotbearingbore eccentricity. The total indicator reading (T.I.R.) must not exceed 0.13 mm. (0.005 in.).

Note: Eccentricitybetweenthedrivingringpilotboreandthepilot bearingboremust not exceed0.20mm. (0.008in.).

48



Drive Ring Installation

RefertoinformationregardingcleaningandinspectionofthedriveringintheCleaning and Inspection sectionofthismanualbeforeproceeding.

1. Clean the drive ring and flywheel of any dirt or debris as necessary.

2. Usecrocusclothoremeryclothtoremoveanysurfaceimperfectionssuchasnicks,burrs,andsharpedgesontheO.D.orthesurfacethatwill be mounted against the flywheel face.

3. Usecrocusclothoremeryclothtoremoveanysurfaceimperfectionssuch as nicks, burrs, and sharp edges in the I.D. of the flywheel pilot boreoronthefacethatwillbeincontactwiththedrivering.

4. Position the drive ring against the flywheel, piloted in the mounting bore,andsecurewitheighthex-headcapscrews.Torquethecapscrewto the proper specifications given in Torque Values for Fastenersinthe Description and Specifications section of this manual.

Drive ring attachment screws must be grade 8 per SAE J429. Do not use substitutes.

49



Ball-Type Pilot Bearing Installation

Refer to the Twin Disc Power Take-Off Reference Listing in the Description and Specifications section and Engineering Drawings near the back of this manual.

Refer to information regarding cleaning and inspection in the Cleaning and Inspection section of this manual before proceeding.

1. Support the output end of the clutch shaft.

2. Make sure the clutch shaft end stub is free of surface imperfections such as nicks, burrs, and sharp edges. Remove them using fine emery cloth or crocus cloth.

3. Tap the pilot bearing onto the clutch shaft. The front face of the pilot bearing should be positioned flush with the input end of the clutch shaft. Tap or apply force to only the inner race of the bearing.

Note: Tap or press only on the inner race of the bearing. Any impact on the outer race or balls will damage the bearing, resulting in shortened service life or premature failure.

Do not damage the seal of the pilot bearing. A damaged seal renders the pilot bearing destroyed and it must be replace with a new bearing.

Front of PilotBearing Flush with

End of ClutchShaft

Clutch Shaft

Pilot Bearing(Ball-type shown)

Figure 12. Position of the Ball-Type Pilot Bearing on the Shaft

50



Roller-Type Pilot Bearing Installation

SomeTwinDiscPowerTake-Offsaredesignedwithroller-typepilotbearings.Alloftheroller-typebearingsavailablefromTwinDiscaretheseparateracetype,i.e.theinnerraceisremovablefromtheouterraceandsealassembly.Due to its design configuration, axial alignment of the inner and outer races is extremely important. Theinformationandinstructionsbelowwillassureproperbearingmounting.

Instructions for assembly.

RefertotheTwin Disc Power Take-Off Reference ListingintheDescriptionand Specifications section and Engineering Drawingsnearthebackofthismanual.

Refer to information regarding cleaning and inspection of the relatedcomponentsintheCleaning and Inspection sectionofthismanualbeforeproceeding.

1. PositionthePTOonthebedofapresswiththepilotbearingendupandthe output end of the clutch shaft resting firmly on a solid support.

Note: ThePTOmustbestandingon theoutputendof theshaft.

The power take-off must be securely supported as it stands on the end of the shaft so it does not tip or fall over.

Output end of the shaft MUST rest and be in contact with a solid support (Press bed).

Use several 4” x 4” blocks or other means of insuring the PTO does not tip or fall over.

Figure 13. Support the PTO, Standing it on the End of the Shaft

51



2. Pressthepilotbearinginnerraceontheclutchshaftsoitisflushwiththeinputendoftheshaft.

3. Carefully measure dimension (a).Recordthemeasurement.

4. Refer to the Roller-Type Pilot Bearing Dimensions table in theDescription and Specifications section of this manual. Subtract the appropriate roller bearing nominal width (c) from measurement (a). Thiswilldeterminethepositionofthepilotbearingouterraceintheflywheel bore (dimension b).

a - c = b (pilot bearing outer race position)

5. Install the pilot bearing outer race in the flywheel and position it at dimension (b) as shown.

Pilot BearingInner Race

Inner raceflush with

end of shaft

a

b

FlywheelHousing

Face

Flywheel

Pilot Bearingouter race

Figure 14. Install Pilot Bearing-Roller Type

52



PTO Installation to Engine or Driving Member

RefertotheTwin Disc Power Take-Off Reference ListingintheDescriptionand Specifications section, the exploded views in the IllustrationsectionandEngineering Drawingsnearthebackofthismanual.

RefertoinformationregardingcleaningandinspectionintheCleaning and Inspection sectionofthismanualbeforeproceeding.

1. Clean the PTO housing flange, flywheel housing flange, and pilot bearingboreofanydebris.

2. Make sure the housing flange and flywheel housing flange are free of surfaceimperfectionssuchasnicks,burrs,andsharpedges.Removethem using fine emery cloth or crocus cloth.

3. Install a minimum of three guide studs in the flywheel housing, located approximately120oapart.Usingasuitablehoist,positionthePTOonthe guide studs and slide it against the flywheel housing, carefully aligning the pilot bearing with the pilot bearing bore in the flywheel and the teeth of the friction plates (6) with the drive ring (1).

Do not force the PTO unit onto the engine. If any resistance is noted, repeat the clutch plate centering procedure shown either in the clutch assembly or final assembly information of the Assembly section of this manual to align and center the friction plates so they mesh properly with the teeth of the drive ring.

4. Secure the PTO housing to the flywheel housing with 16 hex-head capscrews. Torque the capscrew to the proper specifications given in Torque Values for Fasteners in the Description and Specifications sectionofthismanual.

Note: PTO housing to flywheel housing attachment screws mustbegrade5orbetter.

5. Raptheoutputendofthemainshaftwithasofthammertoremoveanypreloadonthemainbearingsand/orpilotbearing.

This step must not be omitted. Bearing failure may result.

53



6. Measurethecrankshaftendplayagain.Themeasurementmustbethesamevalueasrecordedfromstep1under Prior To Installation.Locateandcorrect thesourceofpreloadif theendplay isnot thesamevalue.

Engine and/or PTO failure will result from any excessive preload on components.

7. Install the key (34) on the output end of the clutch shaft (33) and install the drive sheave, chain sprocket, or u-joint flange as the application requires.

Refer to the Twin Disc Power Take-Off Reference Listing in the Description and Specifications section, and Engineering Drawings towards the back of this manual. If a customer-supplied PTO support plate mounted at the output end of the PTO is to be used, refer to information regarding the support plate in Twin Disc PTO Support Plate Specifications in the Description and Specifications section of this manual.

8. Install the hand lever assembly (53) as shown in the Hand Lever Position for Twin Disc Power Take-Offs and, if appropriate, theModel SPE111 and SPE211 Arm Adjustment Procedure in thisInstallationsection, andtorquethehexheadcapscrewto81-95Nm(60 - 70 lb. ft.)

Note: ModelsRB111,RB211andRB11PMdonotusehandleverassemblies.

54



Hand Lever Position for Twin Disc Power Take-Offs

NormalPosition:OperatingShaftHorizontal

To insure there isnopreloadontheshiftingmechanism, thehand leverpositionwith theclutchengagedshouldbeslightlypastverticalposition,slightlytowardsengine.

The handle should NEVER be installed in a horizontal position when the operating shaft is positioned horizontally. Improper handle position can cause throwout collar failure resulting in catastrophic failure of the clutch.

Vertical

DisengagedEngaged

Figure 15. Hand Lever Position

SpecialPosition:OperatingShaftVertical

Iftheinstallationrequiresthattheoperatingshaftbeinaverticalposition,a stop collar must be installed to prevent the weight of the hand lever,operatingshaftandthrowoutyokefromcreatingapreloadonthethrowoutcollar.Positionthehandleverasdescribedaboveandalsopositionandlockastopcollarontheoperatingshaftsothatthethrowoutyokeiscenteredonthethrowoutcollar.ContactTwinDisc’sServiceDepartmentforinformationonuseofastopcollar.

StopCollarOperatingShaft

Figure 16. Use of a stop collar with a vertical operating shaft

55



Model SPE111 and SPE211 Arm Adjustment Procedure

Clearance “X”SPE111 - 3.048 mm. (0.120 in.)SPE211 - 2.286 mm. (0.090 in.)

ClearanceSPE111 - 3.048 mm. (0.120 in.)SPE211 - 3.048 mm. (0.120 in.)

Figure 17. SPE111 and SPE211 Series Adjust Camrols

RefertotheEngineering Drawings,theillustrationsaboveandtheexplodedviewsintheIllustrationssectionofthismanual.

1. Loosentheneutrallockarmhexheadcapscrewthatsecuresittotheoperatingshaft.

2. Engagetheclutch.

3. Position the camrols (92) at the clearance “X” by using feeler stock orgauges.

4. Place the detent roller (84) in the forward groove of the detent locator (88).

5. Position the neutral lock arm (80) on the operating shaft to provide a clearance of 3.148 mm. (0.120 in.) between the snap ring (79) on the roller pin (82) and the neutral lock arm.

6. Tightentheneutrallockarmhexheadcapscrewandtorqueto40.7Nm (30 lb.-ft.).

56



Position and Measure Alignment of the Sheave

1. AlignthedriveR anddriveNshaftssothatthefacesofthesheavesarealignedandparalleltoeachother.MisalignmentmustbeLESSTHAN1/2of1degreebetweenthefaces.

2. Positionthesheave(driveR sheave on the PTO shaft) so it is aligned withthedriveN sheave (on equipment being driven by the PTO).

3. Calculate MAXIMUM allowable misalignment distanceofthefaces: Max. = 0.222 mm. (0.00875 in.) x distance between sheave centerlines.

4. Place a tight cord or straight edge against both edges of the flat face ofonesheave.Measurethedistancebetweenthecordorstraightedgeandthefaceoftheothersheave.Thegapisthemisalignment distance.

Align the sheaves to meet specifications.

Misalignment between the sheaves will result in shortened service life of the belts and may result in premature equipment failure.

MisalignmentDistanceMeasure

misalignmentdistancebetween

sheave face and cord or straight

edge here.

Straight edge or tight cord to be flat against both edges of both sheaves

UseAlignment

straight edge or tight cord

UseAlignment

straight edge or tight cord

Aligned Not Aligned

Straight edge or tight cord flat against

both edges of one sheave

DriveR Sheave

DriveN Sheave

DriveR Sheave

DriveN Sheave

DriveR and DriveN shafts

must be parallel.

Figure 18. Align Sheaves to Specifications

57



Allowable Side Loads

Side loads must NEVER exceed the values shown in this section.

x

CENTERLINEOF SIDE

LOAD

REAR OF BEARINGHOUSING

L= 126,000 x H.P.N x D x F x LF

Figure 19. Allowable Side Pull and Formula to Determine Applied Load

Formula values:

L = actual applied load (Lbs.)

N = shaft speed (RPM)

D = pitch diameter (in.) at sheave, etc.

F = load factor − 1.0 for chain or gear drive − 2.5 for all V belts− 1.5 for timing belts − 3.5 for flat belts

LF = 2.1 for reciprocating compressors and other severe shock drivers and 1.8 for large inertia type drive (crushers, chippers, planers)

If side load pulls are found to exceed the Allowable Side Loads shown in the charts and graphs that follow, take appropriate action, BEFORE OPERATING THE PTO, to bring the side loads within acceptable limits.

A support plate must be attached at the rear of some PTOs. See the Twin Disc Power Take-Off Reference Listing and Twin Disc Support Plate Specifications in the Description and Specifications section of this manual.

Note: SP311IL Power Take-offs (BOM SP311P101, for example) are recommended for in-line, not side-loaded, applications.

58



Table 14. Allowable Side Loads

1 2 3 4 5 6 1000 3050 2550 2000 1652 1400 1220

1200 2900 2550 2000 1652 1400 12201800 2560 2370 2000 1652 1400 12202400 2340 2170 2000 1652 1400 12202800 2235 2070 1925 1652 1400 1220

RPM ‘X’ Distance

(Table 14.1) SP111P (M224A): SP111P205, SP111P207, SP111P208, SP111P210,SP111P211, SP111P304, SP111P309, SP111P310

Table14.1

0

500

1000

1500

2000

2500

3000

3500

0 1 2 3 4 5 6

"X"Distance,inches(seedrawing)

Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

2800

59



Table 14. Allowable Side Loads (continued)

1 2 3 4 5 61000 2790 2600 2240 1840 1570 13331200 2630 2450 2240 1840 1570 13331800 2330 2170 2030 1840 1570 13332400 2140 1990 1865 1750 1570 1333

(Table 14.2) SP111P, SPE111HP (M224, M224A, M2467, M2262A):SP111P101, SP111P102, SP111P103, SP111P104,SP111P106, SP111P107, SP111P201, SP111P204,SP111P212, SP111P301, SP111P303, SP111P305,SP111P306, SP111P307, SP111P312, SP111P314,SP111P315, SP111P319, SP111P321, SP111P323,SP111P325, SP111P326, SP111P328, SP111P330,SP111P331, SP111P333, SP111P334, SP111P335,

RPM‘X’ Distance

Table14.2

0

500

1000

1500

2000

2500

3000

0 1 2 3 4 5 6


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

60




1 2 3 4 5 6 1000 3290 3060 2870 2700 2540 2240

1200 3190 2970 2780 2610 2460 22401800 2810 2620 2450 2300 2170 20502400 2530 2370 2220 2090 1970 18602800 2320 2160 2030 1890 1800 1700

RPM‘X’ Distance

(Table 14.3) SP111OP (M2467): X9818

Table14.3

0

500

1000

1500

2000

2500

3000

3500

0 1 2 3 4 5 6"X"Distance,inches(seedrawing)

Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

61




1 2 3 4 5 6 1000 4540 3395 2710 2255 1930 1690

1200 4370 3395 2710 2255 1930 16901800 3900 3395 2710 2255 1930 16902400 3550 3330 2710 2255 1930 1690

RPM‘X’ Distance

(Table 14.4) SP211HP (M224 & M224A): SP211P101, SP211P102, SP211P201,SP211P203, SP211P206, SP211P216, SP211P224,SP211P227, SP211P301, SP211P302, SP211P304,SP211P305, SP211P306, SP211P307, SP211P309,SP211P312, SP211P314, SP211P315, SP211P318,SP211P319, SP211P320, SP211P321, SP211P322

Table14.4

0500

100015002000250030003500400045005000

0 1 2 3 4 5 6


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

62




1 2 3 4 5 6 1000 4728 3558 2852 2380 2042 1788

1200 4728 3558 2852 2380 2042 17881800 4656 3558 2852 2380 2042 17882400 4273 3558 2852 2380 2042 17883000 3993 3558 2852 2380 2042 1788

RPM‘X’ Distance

(Table 14.5) SP211OP (M224):X9894B

Table14.5

0500

100015002000250030003500400045005000

0 1 2 3 4 5 6


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

63




1 2 3 4 5 6 1000 5454 4104 3292 2745 2357 2062

1200 5251 4104 3292 2745 2357 20621800 4651 4104 3292 2745 2357 20622400 4268 4001 3292 2745 2357 2062

RPM‘X’ Distance

(Table 14.6) SP211OP (M2467): SP211P226

Table14.6

0

1000

2000

3000

4000

5000

6000


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

64




1 2 3 4 5 6 1000 4585 3605 2970 2526 2197 1944

1200 4585 3605 2970 2526 2197 19441800 4585 3605 2970 2526 2197 19442400 4585 3605 2970 2526 2197 19443000 4585 3605 2970 2526 2197 1944


(Table 14.7) SP311P (M224A): SP311P201, SP311P301, SP311P303, SP311P304

Table14.7

0500

100015002000250030003500400045005000

0 1 2 3 4 5 6


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

65




1 2 3 4 5 6 1000 1920 1409 1113 919 783 682

1200 1920 1409 1113 919 783 6821800 1920 1409 1113 919 783 6822400 1920 1409 1113 919 783 682

RPM‘X’ Distance

(Table 14.8) SP111HP (M163A): SP111P332

Table14.8

0

500

1000

1500

2000

2500

0 1 2 3 4 5 6


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

66




1 2 3 4 5 6 1000 2670 1959 1547 1278 1089 948

1200 2670 1959 1547 1278 1089 9481800 2670 1959 1547 1278 1089 9482400 2670 1959 1547 1278 1089 9483000 2670 1959 1547 1278 1089 948


(Table 14.9) SP111P (M167): SP111P332

Table14.9

0

500

1000

1500

2000

2500

3000

0 1 2 3 4 5 6


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

67




(Table 14.10) SP211OP (M224A): SP211P204, SP211P207, SP211P209

1 2 3 4 5 61000 4232 3184 2552 2130 1827 1600 1200 4232 3184 2552 2130 1827 16001800 4232 3184 2552 2130 1827 16002400 4232 3184 2552 2130 1827 16003000 4232 3184 2552 2130 1827 1600

RPM‘X’ Distance

Table 14.10

0

500

1000

1500

2000

2500

3000

3500

4000

4500

0 1 2 3 4 5 6"X" Distance, inches (see drawing)

Max

imum

load

, Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

68




1 2 3 4 5 6 1000 4172 3281 2703 2298 1999 1769

1200 4172 3281 2703 2298 1999 17691800 4172 3281 2703 2298 1999 17692400 4172 3281 2703 2298 1999 17693000 4172 3281 2703 2298 1999 1769


(Table 14.11) SP311OP (M224A): SP311P306

Table14.11

0

500

1000

1500

2000

2500

3000

3500

4000

4500


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

69




1 2 3 4 5 6 1000 4619 3579 2858 2378 2037 1781

1200 4373 3579 2858 2378 2037 17811800 3872 3579 2858 2378 2037 17812400 3552 3315 2858 2378 2037 1781

3000 3322 3100 2858 2378 2037 1781

(Table 14.12) SPE211HP (M2467): SP211P213, SP211P220

RPM‘X’ Distance

Table14.12

0500

100015002000250030003500400045005000

0 1 2 3 4 5 6


Max

imum

load

,Lbs

1000RPM

1200RPM

1800RPM

2400RPM

3000RPM

70




1 2 3 4 5 6 1000 4510 3890 3090 2570 2190 1910

1200 4380 3770 3000 2490 2120 18501800 4270 3660 2910 2410 2060 18002400 4170 3560 2830 2350 2010 1750

3000 4070 3480 2760 2290 1960 1710

(Table 14.13) SP111P (02007431): TR434510, TR434510C

RPM‘X’ Distance

Table14.13

0500

1000

15002000250030003500

400045005000

1 2 3 4 5 6"X"Distance,inches(seedrawing)

Max

imum

Loa

d,L

bs

2000RPM

2200RPM

2400RPM

2600RPM

2800RPM

71




1 2 3 4 5 6 2000 5280 3940 3140 2610 2230 1950

2200 5110 3810 3040 2530 2160 18902400 4970 3710 2950 2460 2100 18402600 4840 3610 2880 2390 2050 1790

2800 4720 3520 2810 2330 2000 1740


(Table 14.14) RFD211P (02007431): TR411127, TR434845

Table14.14

0500

10001500200025003000350040004500500055006000


Max

imum

Loa

d,L

bs

2000RPM

2200RPM

2400RPM

2600RPM

2800RPM

72




1 2 3 4 5 6 1600 2691 1996 1586 1316 1124 981

1900 2541 1885 1498 1243 1062 9272200 2420 1795 1426 1183 1011 8832500 2319 1720 1367 1134 969 846

2800 2233 1656 1316 1092 933 814

RPM‘X’ Distance

(Table 14.15) RFD111P (M224A): TR434510A

Table14.15

0

500

1000

1500

2000

2500

3000


Max

imum

Loa

d,L

bs

1600RPM

1900RPM

2200RPM

2500RPM

2800RPM

73




1 2 3 4 5 6 1600 2698 2013 1606 1335 1143 999

1900 2548 1901 1516 1261 1079 9432200 2426 1810 1444 1201 1028 8982500 2325 1735 1384 1155 985 861

2800 2239 1671 1332 1108 948 829


(Table 14.16) RFD211P (M224A): TR11127A, TR434845

Table14.16

0

500

1000

1500

2000

2500

3000


Max

imum

Loa

d,L

bs

1600RPM

1900RPM

2200RPM

2500RPM

2800RPM

74




1 2 3 4 5 6 1000 4540 3395 2710 2255 1930 1690

1200 4370 3395 2710 2255 1930 1690 1800 3900 3395 2710 2255 1930 1690 2400 3550 3330 2710 2255 1930 1690

RPM‘X’ Distance

(Table 14.17) RB111P (M1985A): RB111P101

Table 14.17

0

500

10001500

2000

2500

3000

35004000

4500

5000

1 2 3 4 5 6"X" Distance, inches (see drawing)

Max

imum

Loa

d, L

bs

1000

1200

1800

2400

75




(Table 14.18) RB111P (M224A): RB111P301, RB111P302

1 2 3 4 5 6 1000 3090 2753 2174 1796 1530 1333

1200 2925 2725 2174 1796 1530 13331800 2590 2413 2174 1796 1530 13332400 2376 2213 2071 1796 1530 1333

3000 2222 2070 1937 1796 1530 1333

RPM‘X’ Distance

Table 14.18

0

500

1000

1500

2000

2500

3000

3500

1 2 3 4 5 6"X" Distance, inches (see drawing)

Max

imum

Loa

d, L

bs

1000

1200

1800

2400

3000

76



Alignment - U-Joint-Type Installation

Refer to illustration on next page.

To realize the longest possible life of the power take-off bearings, the best possible alignment must be maintained between the center line of the power take-off shaft and the center line of the driven unit shaft.

1. It is extremely important that the forks of the drive shaft between the PTO and the driven unit lie in the same plane. This will prevent severe vibrations from occurring in the drive shaft.

2. The center lines of the PTO shaft and the driven unit input shaft must be offset within the limits recommended by the u-joint manufacturer to prolong the life of the universal joint needle bearings.

3. It is extremely important that the center lines of the pto shaft and driven unit input shaft be parallel. This will further prevent vibrations which cause premature pto bearing failure.

4. Proper lubrication of the pto is important for satisfactory service. Refer to lubrication specifications in the Maintenance section of this manual.

Align the centerlines of the pto shaft and the input shaft of the driven unit. (One possible method is described below.)

5. To align the engine and gear head by this method, two accurate straight edges at least 91 cm. (36 in.) long and a tape measure are required.

6. Place the straight edges horizontally along the face of the pto and gear head hubs. Measure distances A and B. These two distances should be equal within 3.17 mm. (.125 in.) at a point 45.7 cm. (18 in.) from the centerline of the shaft. Move the engine and/or driven unit to obtain this specification.

7. Rotate the shafts so the straight edges are in a vertical position. Measure the distances C and D as was done for A and B in step 2. These two distances should be equal within 3.17 mm. (.125 in.) at a point 45.7 cm. (18 in.) from the centerline of the shaft. Move the engine and/or driven unit to obtain this specification.

77



8. Secure the engine and driven unit. Recheck A and B, C and D as described in steps 5 through 7 above. All measurements must be within the specifications. If not, repeat steps 5 through 7 until specifications are met.

Figure 20. Alignment - U-Joint-Type Installation

78



Setting Up Air Engagement on Twin Disc Power Take Offs

1. The cylinder should be located so that the piston moves forward and backward in exactly the same direction as the engagement lever and is aligned so it travels in exactly the same plane.

2. The air cylinder must be of sufficient size to operate the required torque to engage the clutch. It must have some means to make adjustment on the piston stroke.

3. Air pressure must be constant. Low pressures could give only partial engagement which will cause failures of the clutch and throwout collar.

4. The piston travel must be within limits established to both fully engage and fully disengage the clutch. Failure to provide these parameters will cause failure and possible breakage of the clutch.

5. The engaging cylinder must not place a pressure either in the engaged or disengaged direction after completion of its cycle. The throwout collar must float free after engagement or disengagement. Operating the pto with constant pressure on the throwout collar will result in failure.

Suggestion: A slotted connector, similar to the one illustrated below may be used.

FullyEngagedPosition

FullyDisengaged

Position CylinderRod

Connector withslotted hole

Slotted holePin

Adjustcylinder

stroke sothere is a

clearance onboth sides ofthe pin when

inengaged ANDdisengaged

positions

Figure 21. Slotted Connector Used on Air Cylinder Rod

79



6. The air cylinder must be readjusted when the clutch is readjusted and any time the travel or position moves from the specifications described above.

Determine the length of travel for the engaging cylinder.

7. Multiply the length of the hand lever by the value shown in the following chart. This provides the approximate required length of the piston stroke.

Note: The hand lever length is the distance from the center of the operating shaft to the point where the cylinder will be connected to the lever.

Table 15. Engaging Stroke Travel at 25.4 mm. (1 in.)

SP111, SPE111 Series 8.255 .325

SP211, SPE211 Series 6.782 .267

Model Engaging Stroke Travel at 25.4 mm (1 in.)mm. inches

Determine the engaging force in pounds required at the cylinder.

8. Divide the force value in the chart below by the length of the hand lever (in inches). This provides the required force (in pounds) that must be provided by the piston.

Note: Periodically disconnect the power cylinder to measure the clutch engagement force. Refer to Clutch Adjustment in the Maintenance section.

Table 16. Engaging Force Required at Cylinder at 25.4 mm. (1 in.)

SP111, SPE111 Series 6850 1540

SP211, SPE211 Series 8585 1930

SP311 Series 11009 2475

Model Engaging Force Required in Cylinderforce (newtons) force (pounds)

80



Notes

81

Twin Disc, Incorporated Operation


Operation

General Information

Model SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 Series Power Take-Offs consist of a manually engaged and disengaged disconnect clutch mounted on an output shaft in a cast iron housing that is bolted to the engine. Clutch engagement and disengagement is accomplished by means of an operating lever on the outside of the pto housing, which actuates an internal linkage mechanism.

A drive ring is bolted to the engine flywheel. Internal teeth of the drive ring mesh with external teeth of the clutch driving plate(s). These are the input components of the Power Take-Off. Input components always rotate at engine rpm.

Output components of the Power Take-Off consist of a clutch hub that is mounted on the output shaft, a linkage mechanism for clutch engagement and disengagement and clutch adjustment components. Clutches designed with multiple clutch driving plates have a clutch center plate located between the friction plates. The clutch center plate and pressure plate are driven through internal teeth that mesh with external teeth on the clutch hub. Until clutch engagement is initiated while the engine is running, the output components do not rotate.

Model RB111, RB211 and RB11PM Series Power Take-Offs consist of a drive spider or torsional spring coupling mounted on an output shaft in a cast iron housing that is bolted to the engine. A drive ring (or the torsional spring coupling) is bolted to the engine flywheel. Internal teeth of the drive ring mesh with external teeth of the drive spider These models are direct drive units and contain no clutch mechanism. The drive spider (or torsional spring coupling) and output shaft always rotate at engine speed.

82

Twin Disc, IncorporatedOperation


Grease- or oil-lubricated main bearings are located in the pto housing and/or bearing carrier. Most designs include a pilot bearing mounted in the engine flywheel to support the front end of the clutch shaft. However, some designs incorporate a main bearing configuration that does not require use of a pilot bearing.

A support plate bolted to the bearing carrier of some units is required to provide sufficient support where heavy weight and/or side loads exist.

83

Twin Disc, Incorporated Operation


Clutch Engagement Procedure

Normal clutch engagement

Do not start the engine with the nameplate removed.

The PTO clutch should normally be engaged with the engine at the lowest rpm possible. The clutch should be engaged quickly to avoid an extended period of slippage during engagement. The clutch should be engaged with the engine operating below 1,000 rpm.

After the clutch is fully engaged and the load has been brought up to engine engagement speed, the engine rpm may be increased to operating speed.

Clutch engagement where high inertia loads exist

Twin Disc, Inc. recommends that the PTO installation be designed to allow clutch engagement at 1,000 rpm or below. Under extreme circumstances, where high inertia loads must be picked up, the engine may have to be operated at higher speeds while the engagement occurs, as engaging the clutch at 1,000 rpm or below may result in stalling the engine.

Clutch engagement should occur at the lowest possible engine rpm. Heavy inertia loads may be brought up to engine speed by a series of short clutch engagements and disengagements (sometimes referred to as “bumping”) at intervals long enough to gradually increase the speed of the load, yet prevent excessive heat build-up in the friction facings.

After the clutch is fully engaged and the load has been brought up to engine engagement speed, the engine rpm may be increased to operating speed.

Under no circumstances should the clutch be slipped for more than a second or two without either fully engaging or disengaging the clutch to permit it to cool.

84

Twin Disc, IncorporatedOperation


Clutch engagement to clear a jammed driven device

Never engage the PTO to unjam a stuck load. Doing so could result in injury to the operator, and damage to the equipment.

Always shut the engine off and disengage the clutch before clearing a jammed load. The jam should be cleared, and the output shaft must be rotated to be certain that the jam is completely removed before starting the engine and engaging the PTO.

Operator should be aware of the required clutch engagement force

The clutch engagement force must be at the proper level to realize long life of the PTO clutch. If this engagement force seems low, refer to the Clutch Adjustment Procedure in the Maintenance section of this manual.

Insufficient clutch engagement force can cause clutch slippage resulting in catastrophic clutch failure.

The engagement lever must be located in the proper position to prevent premature failures of the internal throwout collar components. The engagement lever should be in the vertical position with the clutch engaged. See Hand Lever Position for Twin Disc Power Take-Offs in the Installation section of this manual.

Improper handle position can cause throwout collar failure resulting in catastrophic failure of the clutch.

85

Twin Disc, Incorporated Maintenance


Maintenance

Maintenance Tips

Tapered Roller Bearing Adjustment

1. Tapered roller bearing end play adjustment should have been adjusted prior to installation of the power take-off. Periodically check for excessive shaft movement during clutch engagement and disengagement and during operation to insure failure is not occurring. See information in the Installation section of this manual.

Pilot Bearings

2. Ball-type pilot bearings and Roller-type pilot bearings must be installed properly. Some pilot bearings are to be greased periodically, See Lubrication this Maintenance section.

Lubrication

3. Verify that the PTO is properly lubricated prior to starting the engine and at all times during operation. Refer to the Twin Disc Power Take-Off Reference Listing in the Description and Specifications section, Lubrication in this Maintenance section and Engineering Drawings near the back of this manual.

Throwout bearing failures may be, among other causes, the result of improper lubrication.

Clutch Adjustment

4. Check frequently to insure that the clutch is adjusted according to the procedure outlined in Clutch Adjustment in this Maintenance section. Failure to do so will result in premature clutch wear and failure.

Note: Twin Disc will not be responsible for any damage or injury resulting from improper adjustment and/or lubrication. This includes any accessory drives and loads.

86

Twin Disc, IncorporatedMaintenance


Hand Lever Position

5. Throwout bearing failures may be, among other causes, the result of improper hand lever position. See Hand Lever Position for Twin Disc Power Take-Offs and Model SPE211 and SPE311 Arm Adjustment Procedure in the Installation section of this manual.

Alignment

6. The flywheel and flywheel housing alignment should have been set within specifications prior to installation of the power take-off and must be maintained for long service life of the components.

Misalignment of driven components can result in power take-off failure. Periodically check for bolts that may have loosened or driven components that have not been properly aligned during servicing or maintenance procedures. See information regarding Alignment in the Installation section of this manual.

Support Plate

7. When mounting the engine and Power Take-Off in the machine, a customer-supplied support plate may be required to support the output end of the PTO housing. Proper installation and alignment of the support plate must be maintained.

Periodically check to insure that the bolts securing the support plate are tightened to specifications and that the support plate is properly reinstalled and realigned whenever work is performed on the power take-off or power package module. See the information about customer-supplied support plates and Twin Disc Support Plate Specifications contained in the Description and Specifications section of this manual.

Failure to follow maintain this requirement may result in damage to the power take off or the engine flywheel housing.

87



Belt or chain tension/Allowable Side Load Pulls

8. Maintain proper belt or chain tension adjustments. Avoid excessively tight or excessively loose belts or chains. Failure to maintain proper belt or chain adjustment can cause bearing failure and shortened power take-off service life.

Deflection Caused by Side Load Pulls

9. Maintain proper side that do not exceed specified limits shown in Allowable Side Load Pulls in the Installation section and PTO Deflection in the Description and Specifications section.

Air Engagement Mechanisms

10. Air engagement mechanisms remain properly adjusted at all times. See Setting Up Air Engagement on Twin Disc Power Take-Offs in the Installation section.

88



Lubrication

Refer to the Twin Disc Power Take-Off Reference Listing, Engineering Drawings and the illustrations below for location of fittings.

Grease Specifications

Use NLGI Grade 2 grease with a minimum 149° C. (300° F.) drop point for all lubrication.

Oil Specifications for oil-lubricated main bearings - SP211OP, SP311OP and RB11PM Series

Use a good grade MS, DG, or better SAE No. 30 engine oil.

Lubrication Locations

Config. C Config. E

Config. F

Config. B

Config. D

Config. A(Except RB111 and RB211 Series)

Config. A(RB111 and RB211 Series)

MainBearings(grease)

Collar(grease)


OperatingShaft(grease)

Collar(grease)

Check Oil Level


Oil FillCollar(grease)

MainBearings(grease)OperatingShaft(grease)

Collar(grease)



Collar(grease)




Collar(grease)


Config. G

Oil FillOil Level

Check Plug

Oil Drain Plug

Figure 22. Lubrication Locations

89



Refer to BOM and Twin Disc Power Take-Off Reference Listing in the Description and Specifications section of this manual.

Table 17. Quick-reference lubrication chart. Also see information above.

Main Bearings

All Models SP111, SPE111, SP211, SPE211, SP311, RFD111, RFD211, RB111 and RB211 Series (except SP211OP, SPE211OP and SP311OP Series)

Apply 1 cc of grease (one shot from a grease gun) before start-up and then every 8-10 hours operation thereafter, through the fitting on the flange of the bearing carrier (55).

Models SP211OP, SPE211OP and RB11PM SeriesThe tapered roller bearings are lubricated from oil contained in an oil cavity in the bearing carrier. The oil level should be checked and maintained every 8-10 hours operation. Drain and refill the oil cavity every 6 months or 1000 hours (whichever occurs first).

Models SP311OP SeriesThe tapered roller bearings are lubricated from engine oil continuously supplied through an orifice fitting in the bearing carrier. The oil drains back to sump through an opening in the bottom of the bearing carrier. No periodic check is necessary.

90



Operating Shaft Fittings

All Models SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 SeriesApply 1 cc. of grease (one shot from a grease gun) before starting and then every 3 months or 100 hours operation (whichever occurs first).

Throwout Collar

All Models SP111, SP211 SP311, RFD111 and RFD211 SeriesApply 1 cc. of grease (one shot from a grease gun) daily before start-up and then every 8-10 hours operation thereafter, through the fitting on the tapered part of the housing.

Models SPE111, SPE211 SeriesNo throwout collar is used. No lubrication is necessary.

Pilot Bearing

All Models (except sealed-for-life style bearings).The pilot bearing supplied with most power take-offs is pre-lubricated and sealed for life. No maintenance is required. Inspection is recommended every two years or when the power take-off is removed from the driving component for servicing.

All Models with sealed-for-life style bearingsIf the pilot bearing supplied with your power take-off is to be periodically lubricated, add one shot of grease from a grease gun every 100 hours through the fitting in the output end of the clutch shaft. Do Not Overgrease!!

Clutch Linkage

All Models SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 SeriesLubricate the clutch linkage mechanism, cotter pins, clevis pins and levers, with engine oil every 500 hours of operation.

Lubricate sufficiently but sparingly. Excess oil can splash or drip onto the friction plates, causing clutch slippage that may result in clutch failure.

91



Clutch Adjustment

Note: New power take-offs must have clutch adjustment checked before being placed into service and after the first 10 hours of operation. This includes any power take-offs with new friction plates. New plates have a wear-in period and the clutch may require several adjustments before the new plates are worn-in.

After wear-in, clutch adjustment should be checked regularly. Heavy duty applications (rock crushers, etc.) which have frequent engagement, numerous engagements in an operating day or relatively long periods of slip (large inertias), require more frequent readjustment than light duty applications.

Adjust the clutch BEFORE it overheats, does not pull (slips), or the operating lever jumps from the engaged position. These symptoms are indications that clutch adjustment is required.

Adjustment Measurements:

Adjustment measurements are made by fitting a torque wrench with a 1-1/2” socket over the hex end located at the bottom of the hand lever. Grasp only the torque wrench when making measurements.

1. If equipped with a power engagement device, disconnect it from the operating shaft before taking measurements.

2. Adjustment measurements are made with the engine operating at normal clutch engagement speed (below 1000 rpm). Adjustment measurement must be made before the clutch heats up from operating (first engagement of the day). Multiple engagements will heat up the friction plates and cause them to expand. Success engagements within a short period of time will have higher torque values unless the friction plates are wearing more than they are expanding (high inertia engagement).

92



To adjust the clutch:

Engine must be stopped (not rotating) before removing the instruction cover plate (45) to access the clutch adjustment. Contact with rotating parts can cause injury.

Refer to the exploded views in the Illustrations Section of this Service Manual.

1. Clutch must be in the released position before adjusting the clutch.

2. Remove the instruction cover plate (45) from the housing (44) and turn the clutch shaft until the adjusting ring lock pin (25) can be reached.

3. Disengage the adjusting lock pin and insert a cotter pin or small nail into the hole provided to hold it in the disengaged position.

4. Turn the adjusting yoke (26) to the right (or clockwise when looking

at the flywheel) until the required peak torque at the operating shaft (55) to engage the clutch is between the limits on the instruction cover plate (45). If it is near the minimum torque, adjust one more notch so it will be approaching the maximum torque value. Do not exceed upper limit. Refer to the Description and Specifications – Engagement force on the operating shaft section of this manual for the correct peak torque.

TIP: If the adjusting nut is hard to turn, loosen the threads by radial rap ping the adjusting nut with the handle end of the hand lever about every one-sixth of a revolution of the clutch if it has three levers (quarter of a revolution of the clutch if it has four levers) to loosen up the threads. Be careful not to mushroom over the adjustment slots. If the threads are severely rusted, carefully apply penetrating oil to the threads before rapping the adjusting nut.

5. Remove the cotter pin or small nail. Re-engage the adjusting lock pin.

6. Repeat steps 3 thru 5 above as necessary until the proper torque reading is obtained. Replace the instruction cover plate and secure with two hex-head cap screws (46). Securely tighten.

7. Recheck engaging torque per above Adjustment Measurements step 2. Torque measurements with the engine off will usually be a few lb-ft higher.

93



Friction Plate Replacement

Refer to the exploded views in the illustrations section of this manual.

Common symptoms indicating that the friction plates (6) are worn out are:

1. The adjusting yoke (26) cannot be turned clockwise any further.

2. The friction face surfaces have worn flush with the rivet heads, or the rivets are loose.

It is necessary to remove and disassemble the clutch assembly to replace the friction plates. Refer to instructions in the Disassembly and Assembly sections of this manual.

Split-type friction plates are not recommended for use in SP311 Series power take-offs.

94



Field Adjustment - Tapered Roller Bearing End Play (side-loaded pto applications)

Refer to exploded views in the illustrations section of this manual.

All SP111, SPE111, SP211, SPE211, SPE211, SP311, RFD111, RFD211, RB111 and RB211 Series:The only approved method for field adjustment of tapered roller bearings (39, 40, 41, 42) in Twin Disc Power Take-Off units is by the use of a dial indicator to read actual bearing end play.

SP311IL and RB11PM Series:There is no adjustment of ball-type bearings.

Adjustment:Refer to the procedure in (Final Setting) Measure and Set Bearing End Play as described for your bearing housing configuration in the Assembly section of this manual.

Refer to the illustration below and Standard End Play setting for Tapered Roller Bearings used with Side-Load Applications in the Description and Specifications section.

Figure 23. Dial indicator and power take-off position for measuring and setting bearing end play.

95



Field Adjustment - Tapered Roller Bearing End Play (in-line pto applications)

Refer to exploded views in the illustrations section of this manual.

All SP111, SPE111, SP211, SPE211, SPE211, SP311, RFD111, RFD211, RB111 and RB211 Series:The only approved method for field adjustment of tapered roller bearings (39, 40, 41, 42) in Twin Disc Power Take-Off units is by the use of a dial indicator to read actual bearing end play.

1. Field experience for tapered roller bearings used with in-line drive installations indicates that extra care must be taken when adjusting the power take-off tapered roller bearings.

2. The end play settings for these in-line applications may be different than for the side load applications.

3. Bearing end play for these special applications must be adjusted by using the method described for side-loaded applications on the previous pages. However, the amount of end play must be set according to the specifications shown in Bearing End Play setting for Tapered Roller Bearings used with In-Line applications in the Description and Specifications section.

Note: SP111, SPE111 and RFD111 Series only: The tapered roller bearing end play requirement is the same for both side-load and in-line applications.

Note: SP311IL and RB11PM Series: There is no adjustment of ball-type bearings.

96



Notes

97

Twin Disc, Incorporated Disassembly


Disassembly

The following procedure is for complete disassembly of the unit. Prior to this procedure, the power take-off should be removed from the engine. Qualified personnel should do the work in a fully equipped facility.

Note: Illustrations used here are to aid in understanding and completing the procedure, and may not appear to be consistent with the previous disassembly steps.

Note: Seven main bearing housing configurations are illustrated. Refer to the Twin Disc Power Take-Off Reference Listing in the Description and Specifications section to determine which configuration is used in your PTO.

98

Twin Disc, IncorporatedDisassembly


Power Take-Off Removal From The Engine

Refer to the Twin Disc Power Take-Off Reference Listing in the Description and Specifications section, the exploded views in the Illustrations section and Engineering Drawings near the back of this manual.

1. Remove all attached parts from the output end of the power take-off.

2. (if used) Remove the hex nut and hex-head capscrew securing the hand lever to the operating shaft.

3. If used, loosen the support plate from the base mounting.

4. Remove the shaft key.

5. Attach lifting equipment to the power take-off and take out the slack just enough to begin to support the weight of the pto. Do not apply too much force.

Lifting devices and their capacity must be capable of supporting the weight of the power take-off and all attached devices and equipment. Suspend the pto with the lifting devices securely attached at 3 positions (minimum) so it remains with the main drive shaft in a horizontal position until it is safely lowered and resting on a secure bed.

6. Remove the twelve hex-head capscrews securing the power take-off to the engine flywheel housing. Use two bolts (3/8”-16 UNC x 1 1/2” or 7/16”-16 UNC x 1 1/2”) as pusher screws in the two tapped holes provided in the housing flange. Use the pusher screws to separate the pto from the engine flywheel housing. Remove the power take-off from the engine.

7. Remove the eight hex-head capscrews securing the drive ring to the engine flywheel.

8. (if used) Remove the rubber blocks from the drive spider.

99



Torsion Control Spring Removal (model RB211 only)


1. Support the power take-off on a bench with the clutch end facing up. Use wooden blocks under the power take-off.

2. If the pilot bearing remained on the shaft, remove it using a standard bearing puller.

3. Remove the two hex- head capscrews and remove the instruction plate if they were not previously removed.

4. Remove eight capscrews that secure the torsional spring to the flywheel.

5. Straighten the bent portion of the hub nut lock washer. Use a 4” wrench or socket to remove the hub nut from the clutch shaft. Remove the hub nut lock washer.

6. Use a standard bearing puller to remove the hub portion of the torsional control spring from the clutch shaft.

Skip to Clutch Shaft and Housing Disassembly

100



Clutch/Drive Spider Removal


1. Support the power take-off on a bench with the clutch/drive spider end facing up. Use wooden blocks under the power take-off.

2. If the pilot bearing (or pilot bearing inner race) remained on the shaft, remove it using a standard bearing puller.

3. If the pilot bearing is a two-piece bearing, remove the bearing’s outer race from the flywheel using a standard bearing puller.

Note: The pilot bearing will be destroyed upon removal. If the bearing seal is broken the bearing is considered destroyed.

4. Remove the two hex- head capscrews and remove the instruction plate if they were not previously removed.

5. (if a clutch is used) Use a 15/16” wrench to remove the jam nut and lock washer from the hose fitting located on the side of the power take-off housing. Push the fitting and hose into the power take-off housing.

6. Straighten the bent portion of the hub nut lock washer. Use a 4” wrench or socket to remove the hub nut from the clutch shaft. Remove the hub nut lock washer.

101



7. Use a gear puller with threaded legs for tapped holes to pull the clutch assembly or drive spider from the clutch shaft. Install the puller so the threaded legs screw into the holes provided in the hub-and-back plate, usually 1/2”-13 UNC, and the jackscrew exerts force on the end of the clutch shaft.

The thread puller holes are not to be used as jackscrews.

Remove the clutch and puller from the clutch shaft. Remove the hub key if it was not removed with the clutch.

Note: Certain pto models, such as BOM SP111P325 may use special components as part of the clutch operation mechanism. Remove those components that are mounted on the inside of the pto housing.

Skip to Clutch Shaft and Housing Disassembly

102



Clutch Disassembly


All 11 1/2-inch model clutches

1. Set the clutch assembly on a bench with the throwout collar facing up. Disengage the clutch.

2. Remove the grease fitting (23) from the hose fitting (20). Remove the hose (19) and hose fitting (18) from the trunnion of the collar assembly.

3. Remove the three cotter pins (17) from the three clevis pins (16)

securing the sliding sleeve to the links (15).

Note: BOMs such as SP111C016 and SP211C022 only: Remove three hex nuts (110), three shoulder screws (108) and washers (109).

4. Remove the sleeve and collar assembly from the links.

Note: Models SPE111 and SPE211, such as BOM SP111P325, do not use a release collar assembly.

Bronze Collar Disassembly

5. Remove two hex huts and two hex head bolts to remove the throwout collar halves and shims (older style only) from the sliding sleeve.

Ball Bearing Collar Disassembly

6. Remove the internal snap ring (31) from the sleeve side of the collar and let it hang on the sleeve.

7. Tap the collar from the release bearing (30).

8. Remove the external snap ring (29) from the sliding sleeve (27).

9. Press the sleeve from the bearing in a press or pull the bearing from the sleeve.

103



10. Remove the snap ring from the sleeve.


11. Pull the adjusting lock pin (25), compressing the lock pin spring (24), and unscrew the adjusting ring (26) from the hub-and-back plate assembly. Remove the adjusting lock pin and spring from the adjusting ring.

12. Straighten and remove the three cotter pins (12), three washers (10) and three clevis pins (11) that secure the levers to the pressure plate (8). Remove three levers from the pressure plate.

Note: BOMs such as SP111C016 and SP211C022 only: Remove three hex nuts (106), three shoulder screws (103) three washers (104) and three washers (105).

13. Straighten and remove the three cotter pins (13) and the three clevis pins (14) to disconnect the six links from the three levers (9).

Note: BOMs such as SP111C016 and SP211C022 only: Do not remove the links (15) from the clutch levers (9). These items are not serviced separately. Discard if unusable.

14. Remove the pressure plate and drive plate (6) from the hub-and-back plate (4).

Two- and three- plate 11 1/2-inch model clutches only

16. Remove the remaining driving plate(s) (6) and center plate(s) (7) from the hub-and-back plate.


17. If used, remove the three compression springs (76 & 77) from the pockets in the hub-and-back plate.

Certain 11 1/2-inch model clutches such as BOM SP111C016

18. Remove the wear pads, compression springs and plungers from the pockets and bores of the sliding sleeve and the hub-and-back plate.

104



Remove the Operating Shaft and Throwout Yoke


SPE111 and SPE211 Series only: (SP111, SP211, SP311, RFD111 and RFD211 Series skip to step 5)

Snap Ring(79)

NeutralLock Arm

(80)Spring

(81)

Roller Pin(82)

Hex HeadCapscrew

(86)

RetainingRing(83)

Hex HeadCapscrew

(87)

DetentLocator

(88)

Washer(85)

Clevis Pin(89)

ThrowoutFork(54) Set Screw

(91)

Roller(90)

OperatingShaft(55)

Key(56)

Hex Nut(93)

Camrol(92)

Figure 24. Illustration - SPE Release Mechanism Components

1. Remove the two hex nuts (93) from the Camrols (92) and remove the Camrols from the throwout yoke (54).

2. Remove the external snap ring (79) from the roller pin (81) and remove the roller pin, roller (84) and spring (81) from the neutral lock arm (80).

3. Remove the retaining ring (83) from the headed pin (89) and remove the headed pin and roller (84) from the roller pin (82).

4. Remove two hex head capscrews (85) from the locator detent (88) and remove the detent from the clutch housing (44).

105



All SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 Series

5. Removethehex-headcapscrewfromthethrowoutyoke(54).Taponeendoftheoperatingshaft(55)gentlytoexposeoneofthewoodruffkeys(56).Removethekey.Dothesamefortheothersideoftheshafttoremovetheotherkey.Removetheoperatingshaftfromtheclutchhousing(44)andthrowoutyoke.

6. Removethetwogreasefittings(57)fromtheoutsideofthehousingnear the operating shaft holes only if replacement of the parts isnecessary.

Proceed to Clutch Shaft and Housing Disassembly: Sevenmainbearinghousingconfigurationsareillustrated.RefertotheTwin Disc Power Take-Off Reference ListingintheDescriptionandSpecificationssectiontodeterminewhichconfigurationisusedinyourPTO.

Skipto:Clutch Shaft and Housing Disassembly - Bearing Housing Configuration AClutch Shaft and Housing Disassembly - Bearing Housing Configuration BClutch Shaft and Housing Disassembly - Bearing Housing Configuration CClutch Shaft and Housing Disassembly - Bearing Housing Configuration DClutch Shaft and Housing Disassembly - Bearing Housing Configuration EClutch Shaft and Housing Disassembly - Bearing Housing Configuration F

106



Clutch Shaft and Housing Disassembly - Configuration A

Refer to the BOM and exploded views in the Illustrations section of this manual, and the main bearing configuration illustrations below.

Hex HeadCapscrew

(35)

Washer(36)

RetainerClip(37)

BearingRetainer

(38)

BearingCup(39)

BearingCone(41)

Plug(43)

BearingCone(40)

BearingCup(42)

Fitting(57)

Housing(44)

Figure 25. Illustration - Main Bearing Housing Configuration A

1. Position the pto on the bench with the input end up.

2. Remove the hex head capscrew (35), lock washer (36) and the retainer clip (37) so the bearing retainer (38) may be rotated.

3. Rotate the bearing retainer counter-clockwise to remove it.

4. Lift the clutch shaft (33) with the two bearing cones (40 & 41) from the housing. The forward bearing cup (39) will come out with the shaft and bearing cones.

5. Use an arbor press to remove the bearing cones from the clutch shaft. The bearing cones remove in opposite directions from the shaft shoulder.

6. Remove the rear bearing cup (42) from the housing by removing the three plugs (52) (if used) from the access holes in the housing and tapping the race from the bore through the holes using a blunt punch.

7. Remove the grease fitting (51) from the housing.

107



Clutch Shaft and Housing Disassembly - Configuration B


Hex HeadCapscrew

(35)

Front BearingRetainer

(38)

BearingCone(40)

BearingCup(39) Bearing Cone

(41)

Bearing Cup(42)

Internal BearingSpacer

(58)

Washer(60)

Hex HeadCapscrew

(65)

Seal Plate(64)

Nut(62)

External BearingSpacer

(59)

Washer(61)

Housing(44)

Figure 26. Illustration - Main Bearing Housing Configuration B

1. Position the pto housing on the bench with the output end facing upward.

2. Remove the three hex head capscrews (65) that secure the rear seal plate (64) to the housing (44).

3. Remove the rear seal plate.

4. Turn the pto housing over on the bench with the input end facing upward.

5. Remove the six hex head capscrews (35) that secure the bearing retainer (38) to the housing.

6. Remove the bearing retainer from inside the housing.

108



7. Lift the clutch shaft (33) from the housing. The forward bearing cup (39) and cone (40), the internal and external bearing spacers (58 & 59), the rear bearing cup (42) and cone (41) and the rear lock nut (62) and washers (60 & 61) will come out with the shaft.

8. Remove the lock nut and washers that secure the rear bearing cone on the shaft.

Note: Hold the shaft securely without damaging it. The nut is installed with 678-813 Nm (500-600 lb.-ft.) torque.

9. Remove the rear bearing cup and cone, then the internal and external bearing spacers and the front bearing cup and cone from the shaft.

109



Clutch Shaft and Housing Disassembly - Configuration C


OilSlinger

(66)

FrontWear

Sleeve(67)

BearingCarrier

(47)

Hex HeadCapscrew

(48)

O-RingSeal(50)

RearSeal(70)

WearSleeve

(69)

PipePlug(52)

Filler/Breather

(72)

DrainPlug(71)

FrontOil

Seal(68)

BearingRetainer

(38)

Hex HeadCapscrew

(35)

LockPlate(36)

Bearing Cup(42)

BearingCone(40)

Bearing Cup(39)

BearingCone(41)

Shims(63)

Housing(44)

Fitting(57)

Figure 27. Illustration - Main Bearing Housing Configuration C

1. On later production units, remove the oil gauge (74) from the oil gauge tube (73) in the bearing retainer (47).

2. Turn the power take-off housing with attached parts over on the bench. Support the housing so the output end of the clutch shaft faces up and is free to rotate. There should be a clearance below the input end of the clutch shaft.

3. Remove the oil gauge tube from the bearing carrier only if replacement of either is necessary.

4. Remove hex head capscrews (48) and remove the support plate if used.

5. Lift the clutch shaft (33) and bearing carrier (47) unit from the clutch housing (44). Remove and discard the rubber seal (50) located at the bearing carrier pilot.

110



6. Secure the clutch shaft with attached parts in a large vise with protective jaws, with the input end of the shaft facing up, gripping the rear cast section of the bearing carrier in the vise.

7. Remove the oil slinger (66) from the shaft using a gear puller.

8. Remove the six capscrews (35), locking plates (36), bearing retainer (38) and shims (63).

9. Lift the clutch shaft with bearing cones (40 & 41) and 2 wear sleeves (67 & 69) from the bearing carrier. The forward bearing cup (39) will come out with the shaft and bearing cones.

10. Use an arbor press or bearing puller to remove the bearing cones from the clutch shaft. The bearing cones remove in opposite directions from the shoulder machined on the clutch shaft. The two wear sleeves will be removed when the cones are removed.

11. Remove the rear bearing cup from the bearing carrier by removing the two 1/8 pipe plugs (52) from the bearing carrier and tapping the bearing cup (42) from the bearing carrier through the holes using a blunt punch.

12. Knock the oil seal (70) out of the bearing carrier (47).

13. Lay the clutch housing on its side and tap out the oil seal (68) using a blunt-end punch.

14. Remove the pipe reducer, if used, and breather (72) from the bearing carrier.

111



Clutch Shaft and Housing Disassembly - Configuration D


BallBearing

(40)

BearingRetainer

(38)

BearingCarrier

(47)

Hex HeadCapscrew

(48)

InternalSnap Ring

(75)

BallBearing

(41)

Washer(49)

Fitting(57)

Housing(44)

Figure 28. Main Bearing Housing Configuration D


2. Remove hex head capscrews (48) and washers (49) and remove the support plate.

3. Lift the clutch shaft (33) and bearing carrier unit from the clutch housing (44).

4. Secure the bearing carrier with attached parts in a large vise with protective jaws, with the input end of the shaft facing up, gripping the rear cast section of the bearing carrier in the vise.

5. Remove the internal snap ring (75) from the bearing carrier (47).

6. Remove the bearing retainer (38) from the bearing carrier.

112



7. Lift the clutch shaft with the two ball bearings (40 & 41) from the bearing carrier.

8. Use an arbor press to remove the bearings from the clutch shaft. The bearings remove in opposite directions from the shaft shoulder.

9. Remove the grease fitting (51) from the bearing carrier.

113



Clutch Shaft and Housing Disassembly - Configuration E


BearingCup(39)

BearingRetainer

(38)

BearingCarrier

(47)

Hex Head Capscrew (48)& Washer (49)

RetainerClip(37)

Hex HeadCapscrew

(35)

Washer(36)

BearingCone(41)

Plug(52)

Fitting(57)

BearingCup(42)

BearingCone(40)

Housing(44)

Figure 29. Main Bearing Housing Configuration E


2. Remove hex head capscrews (48) and washers (49) and remove the support plate if used.

3. Lift the clutch shaft (33) and bearing carrier (47) unit from the clutch housing (44).


5. Remove the hex head capscrew (35), lock washer (36) and the retainer clip (37) so the bearing retainer (38) may be rotated.

6. Rotate the bearing retainer counter-clockwise to remove it.

114



7. Lift the clutch shaft with the two bearing cones (40 & 41) from the bearing carrier. The forward bearing cup (39) will come out with the shaft and bearing cones.


9. Remove plugs (52) (if used) and remove the rear bearing cup (42) from the bearing carrier by tapping the race from the bearing carrier through the holes using a blunt punch.

10. Remove the grease fitting (51) from the bearing carrier.

115



Clutch Shaft and Housing Disassembly - Configuration F


BearingCup(42)

BearingRetainer

(38)

BearingCarrier

(47)

Hex HeadCapscrew

(48)

Hex HeadCapscrew

(35)

Washer(36)

BearingCone(41)

FrontOil Seal

(68)

Shims(63)

O-Ring Seal(78)

Washer(49)

Rear OilSeal(70)

Fitting(32)

BearingCup(39)

BearingCone(40)

Fitting(57)

Plug(52)

Housing(44)

Figure 30. Main Bearing Housing Configuration F


2. Remove hex head capscrews (48) and washers (49) and remove the support plate.

3. Lift the clutch shaft (33) and bearing carrier (47) unit from the clutch housing (44).


5. Remove the hex head capscrews (35) that secure the bearing retainer (38) to the bearing carrier (47).

6. Remove the bearing retainer and shims (63).

7. Knock the front oil seal (68) out of the bearing retainer and remove the o-ring seal (78).

116



8. Lift the clutch shaft with the two bearing cones (40 & 41) from the bearing carrier. The forward bearing cup (39) will come out with the shaft and bearing cones.


10. Remove the rear bearing cup (42) from the bearing carrier by removing the pipe plugs (52) (if used) from the rear side of the bearing carrier and tapping the race out using a blunt punch through the holes .

11. Remove the fitting (32) from the bearing carrier.

12. Remove the rear oil seal (70) from the bearing carrier.

Note: It is not necessary to remove the steel balls from the passageways of the bearing carrier. They are installed as an integral part of the manufacturing process.

117



Clutch Shaft and Housing Disassembly - Configuration G


BallBearing

(40)

BearingCarrier

(47)Hex Head Capscrew

(48)

ExternalSnap Ring

(114)

InternalSnap Ring

(113)

Housing(44)

InternalSnap Ring

(112)

Oil Seal(68)

Shaft(33)

Figure 31. Main Bearing Housing Configuration G

1. Remove oil fill cup (72), oil level check plug (115) and oil drain plug (71) from the bearing carrier (47)

2. Position the power take-off housing on the bench. Support the housing so the input end up.

3. Remove the four hex head capscrews (48) that secure the bearing carrier to the housing (44).

4. Remove the housing from the bearing carrier and shaft.

5. Remove the oil seal (68) from the housing.

6. Remove the internal snap rings (112 and 113) that secure the ball bearing (40) in the bearing carrier and remove the shaft and bearing.

118



7. Remove the external snap ring (114). Position the shaft and bearing on the bed of a press with the shaft extending downward. Support beneath the inner race of the bearing and press the shaft (33) from the bearing.

Press Ram

Bearing

Supportbeneath

bearing inner race

Shaft

Press Bed

Figure 32. Main Bearing Housing Configuration G

Note: Do not remove the plugs from the housing unless they are damaged or must be replaced.

119

Twin Disc, Incorporated Cleaning and Inspection


Cleaning and Inspection

Cleaning and Inspection

Refer to the BOM, the exploded views in the Illustrations section and Engineering Drawings near the back of this manual.

Bearings

1. Thoroughly wash bearings in clean solvent if they have been in service. Soak bearings in solvent if they are particularly dirty.

Never dry bearing with compressed air. Do not spin bearings while they are not lubricated. Oil bearings with SAE 10 engine oil immediately after cleaning. Be sure bearings are oiled before inspection. Protect clean bearings, whether they are new or have been in service, from dirt, dust, grit or any other contaminant.

2. Inspect bearings for roughness of rotation. Replace the bearing if roughness is found.

3. Inspect bearings for corrosion, scored, scratched, cracked, pitted or chipped races, and for indication of excessive wear of balls or rollers. If one of the these defects is found, replace the bearing.

Preventing Entrance of Dirt Into Bearings

4. Dirt and grit in bearings are often responsible for bearing failure. Consequently, it is important to keep bearings clean. Do not remove grease from new bearings. Keep the wrapper on new bearings until immediately before they are to be installed. Do not expose new clean bearings until they are ready to be used in the assembly. Keep them wrapped in clean lint-free cloth or paper to keep out dust and debris. Protect bearings from contamination even after they are installed on the shaft or in the bore.

120

Twin Disc, IncorporatedCleaning and Inspection


Housings, Cast Parts and Machined Surfaces

5. Replace cast parts or housings that are cracked.

6. Inspect bearing bores for grooved, burred or galled conditions that would indicate that the bearing has been turning in its housing. If the damage cannot be repaired to like-new condition with a crocus cloth, replace the part. Bore diameters must not exceed the maximum dimension shown in Wear Limits in the Description and Specifications section of this manual.

Typical Bearing Carrier or Housing bore area

Closely check bearingbore for damage. Check threads or pilot

for damage.Check face for

damage.

Figure 33. Inspect the bores, threads and faces

7. Inspect bores for wear, grooves, scratches and dirt. Remove burrs and scratches with crocus cloth or a soft stone. Replace parts that are deeply grooved or scratched.

8. Inspect oil and grease passages for obstructions. If an obstruction is found, remove it with compressed air or by working a wire or wire brush back and forth through the passage and flushing it with solvent.

Figure 34. Be sure passageways are clean.

121

Twin Disc, Incorporated Cleaning and Inspection


Shafts, seal lip contact surfaces and bearing journals

9. Inspect machined surfaces for burrs, scratches, nicks and foreign matter. If such defects cannot be removed with crocus cloth or a soft stone, replace the part.

10. Inspect bearing journals on the shaft for grooved, burred or galled conditions that would indicate that the bearing has been turning on the shaft. If the damage cannot be repaired to like-new condition with a crocus cloth, replace the part. Bearing journal diameters must not be less than the dimensions shown in Wear Limits in the Description and Specifications section of this manual.

11. Inspect the pilot bearing journal on the clutch shaft. If it is worn in any way, or if it shows signs that the pilot bearing has been turning on the journal, replace the clutch shaft. Pilot bearing journal diameters must not be less than the dimensions shown in Wear Limits in the Description and Specifications section of this manual.

1

2

3

4

5








Pilot Bearing JournalRear Seal Journal

Front Seal Journal


Main Bearing Journal AMain Bearing Journal A


Figure 35. Inspect bearing journals and seal journals

122

Twin Disc, IncorporatedCleaning and Inspection


12. Inspect seal journal surfaces on the shaft. Look especially for scratches or nicks that extend above the shaft surface. If they cannot be removed using a fine crocus cloth, replace the part. Seal journal diameters must not be less than the dimensions shown in Wear Limits in the Description and Specifications section of this manual.

13. Inspect seal lip contact surfaces on wear sleeves and other surfaces. Look especially for scratches or nicks that intersect with or cross the lip contact area. If they cannot be removed using a very fine crocus cloth, replace the part.

14. Inspect threaded openings for damaged threads. Chase damaged threads with a tap of the correct size.

15. Be sure the snap ring grooves have straight sides, especially if a bearing failure has occurred.

Figure 36. Snap ring grooves must have square sides

123

Twin Disc, Incorporated Assembly


Assembly

The following procedure is for complete disassembly of the unit. Prior to this procedure, the power take-off should be removed from the engine. Qualified personnel should do the work in a fully equipped facility.

Note: Illustrations used here are to aid in understanding and completing the procedure, and may not appear to be consistent with the previous assembly steps.

Note: Seven main bearing configurations are illustrated. Refer to the Twin Disc Power Take-Off Reference Listing in the Description and Specifications section to determine which configuration is used in your pto.

124

Twin Disc, IncorporatedAssembly


Clutch Assembly


All SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 Series (except BOMs such as SP111C016 and SP211C022-skip to step 9.)

Bronze Throwout Collar only: (Ball Bearing Type Throwout Collar skip to step 4.)

1. (Design used on some older models only.) Install the woodruff key in the slot of the sliding sleeve and install the collar ring with the keyway aligned with the woodruff key. Install the external snap ring to secure the collar ring on the sleeve.

Sliding SleeveCollar Ring

Key

Snap Ring

Figure 37. Older Style Sliding Sleeve

125



2. Lubricatetheshoulderoftheslidingsleeve(27)withNo.30engineoilpriortoinstallationofthesplitcollar.Placethethrowoutcollarhalvesovertheslidingsleeveshoulder.Install2hexheadcapscrews1/2”-20x31/4”throughthehalves.Install2hexnutsonthecapscrews.Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

SlidingSleeve

Nut

Capscrew

CollarHalves 23

2221

20

19

18

Figure 38. Assembly of Bronze Throwout Collar

3. Checkcollarrotationtobesureitturnsfreelyontheslidingsleeve.(Proceedatstep 14.)

Ball Bearing Type Throwout Collar

4. Placetheslidingsleeve(27)onthebedofapresswiththebearingendup.Placetheexternalsnapring(31)onthesleevebeforethebearing(30)isinstalled.

Figure 39. Assembly of Ball Bearing Type Throwout Collar

126



5. Press the ball bearing (30) on the sleeve. Press tight to stop against the shoulder.

Note: Pack the bearing with grease before installing it on the collar.

Note: Apply force only against the inner race of the bearing. Pressing against the outer race or contact with the balls will damage the bearing, leading to premature failure.

6. Install the external snap ring (29) to secure the bearing.

7. Install the throwout collar (28) over the bearing. Seat the collar tight against the bearing.

Excessive pressure or sharp impact against the outer race of the bearing during installation of the collar will damage the bearing, leading to premature failure.

8. Turn the sliding sleeve assembly over on the bed of the press. Install the internal snap ring (31) in the collar. (Proceed at step 14.)

127



BOMs such as SP111C016 and SP211P022 only:

9. Install the two plungers (100) in the holes in the sides of the sliding sleeve (27). The plungers must extend through the holes into the internal bore of the sliding sleeve.

10. Install springs (101) in the holes against the plungers.

11. Compress the springs while installing the roll pins (102). The roll pins must retain the springs and plungers in the holes.

12. Lubricate the shoulder of the sliding sleeve (27) with No. 30 engine oil prior to installation of the split collar. Place the throwout collar halves over the sliding sleeve shoulder. Install 2 hex head capscrews 1/2” - 20 x 3 1/4” through the halves. Install 2 hex nuts on the capscrews. Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

SlidingSleeve

Nut

Capscrew

CollarHalves 23

2221

20

19

18

Figure 40. Assembly of Bronze Throwout Collar

13. Check collar rotation to be sure it turns freely on the sliding sleeve. (Proceed at step 29.)

128



Assemble the plate stack

14. Set the hub and back plate (4) on a bench with the threaded and splined section facing up.

15. Install a friction plate (6) on the hub-and-backplate.

Figure 41. Typical SP111, SP211 and SP311 Plate Stack (SP311 is shown)

SP211, SPE211, SP311 and RFD211 Series clutches only: (SP111, SPE111 and RFD111 Series Clutches, skip to step 20.)

16. Install a center plate (7) so it rests flat on the friction plate, meshing the splines of the center plate and hub-and-backplate.

17. Install a second friction plate (6) on the center plate.

SP311 Series clutches only: (SP211, SPE211 and RFD211 Series clutches, skip to step 20.)

18. Install a second center plate (7) so it rests flat on the second friction plate, meshing the splines of the center plate and hub-and-backplate.

19. Install a third friction plate on the second center plate.

129



All SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 Series

20. Install the pressure plate (8) on the top friction plate, meshing the splines of the center plate and hub-and-backplate.

21. Install the adjusting lock pin spring (24) into the pocket in the pressure plate and install the adjusting lock pin (25) on the spring.

Figure 42. Illustration - Levers, Links, Sleeve, Throwout Collar

22. Push down on the pin, compressing the spring while screwing the adjusting yoke (26) partially onto the threaded part of the hub-and-back plate.

23. Place the levers (9) between the lugs of the pressure plate and secure to the pressure plate with three clevis pins (11).

Note: Hook each lever under the edge of the adjusting yoke while aligning the clevis pin hole with the holes in the pressure plate lugs.

130



24. Place a washer (10) on each clevis pin and install three cotter pins (12). Spread the legs of the cotter pins as shown below.

Note: The head of the clevis pin must be in the clockwise side of the lug when viewing it from the top (sliding sleeve) side.

Note: Models SP111, SP211, RFD111 and RFD211 clutches are different from SP311 clutches.

11.9 mm. (0.47 in.) Radius (12)9.65 mm. (0.38”) Radius (13 & 17)

Legs do notextend outsidethis area.

23.9 mm. (0.94 in.) Diameter (12)19.3 mm. (0.76 in.) Diameter (13 & 17)

Figure 43. Spread the cotter pin legs - SP111, SP211, RFD111 & RFD211

14.7 mm. (0.58 in.) Radius (12)11.9 mm. (0.47 in.) Radius (13 & 17)

Legs do notextend outsidethis area.

29.4 mm. (1.16 in.) Diameter (12)23.8 mm. (0.94 in.) Diameter (13 & 17)

Figure 44. Spread the cotter pin legs - SP311

25. Attach six lever links (15) one on each side of each of the three clutch levers (9). Secure with three clevis pins (14) and three cotter pins (13).

26. Place the pre-assembled sliding sleeve (27) on the adjusting yoke, aligning the three lugs between the three pairs of lever links.

27. Attach the links to the sliding sleeve with three clevis pins (16) and three cotter pins (17).

28. Install the hose fitting (18) in the collar trunnion, and attach the flexible hose (19), hose fitting (20) and lubrication fitting (23).

(Proceed to step 48)

131




Assemble the plate stack

29. Set the hub and back plate (4) on a bench with the threaded and splined section facing up.

Figure 45. BOMs such as SP211C022 and SP211C016 Spring Locations (SP211C022 is shown)

30. Install the inner compression springs in the pockets in the (either three or four) pockets in the hub-and-backplate.

BOMs such as SP211C022 only: (BOMs such as SP111C016, skip to step 32.)

31. Also install the four outer compression springs (77) in the pockets, over the inner springs (76).

132




32. Install a friction plate (6) on the hub-and-backplate.

Figure 46. Plate Stack SPE Clutch (BOM SP111C016 is shown)

BOMs such as SP211C022 only: (BOMs such as SP111C016, skip to step 36.)

33. Install a center plate (7) so it rests flat on the friction plate, meshing the splines of the center plate and hub-and-backplate.

34. Install a second friction plate (6) on the center plate.

BOMs such as SP111C016 and SP211P022:

35. Install the plunger (97) in the hole in the side of the hub and back plate (4). The plunger must extend through the hole into the internal bore.

36. Install spring (98) in the hole against the plunger.

133



37. Install the wear pad (99) against the spring. The wear pad must insert into the spring.

38. Install the pressure plate (8) on the top friction plate, meshing the splines of the center plate and hub-and-backplate.

Note: While installing the pressure plate, push the wear pad (96) to compress the spring (97).

39. Install the adjusting lock pin spring (24) into the pocket in the pressure plate and install the adjusting lock pin (25) on the spring.

Figure 47. Illustration - Levers, Links, Sleeve, Concial Spring, Throwout collar - BOMs such as SP111C016 & SP211C022

40. Push down on the pin, compressing the spring while screwing the adjusting yoke (26) partially onto the threaded part of the hub-and-back plate.

41. Install the conical spring (111) on top of the hub and back plate (4). The small end of the spring must extend downward into the internal bore.

134



42. Place the levers (9) between the lugs of the pressure plate.

Note: Hook each lever under the edge of the adjusting yoke while aligning the clevis pin hole with the holes in the pressure plate lugs.

43. Install three washers (104) on the three shoulder screws (103). Insert the shoulder screws through the levers and lever lugs.

Note: The clutch links (15), clutch levers (9), headed pins (14), washers (107) and washers (13) are not serviced separately. Order new parts if necessary and install as a pre-assembled unit.

Note: The head of the shoulder screw must be in the clockwise side of the lug when viewing it from the top (sliding sleeve) side.

44. Install three washers (105) on the three shoulder screws and secure each with a hex nut (106). The nuts are self-locking-type hex nuts. Tighten securely.

45. Place the pre-assembled sliding sleeve (27) on the adjusting yoke, aligning the three lugs between the three pairs of lever links.

46. Insert the shoulder screws (108) through the links and sliding sleeve lugs. Place three washers (109) on the three shoulder screws and secure each with a hex nut (110). The nuts are self-locking-type hex nuts. Tighten securely.

47. Install the hose fitting (18) in the collar trunnion, and attach the flexible hose (19), hose fitting (20) and lubrication fitting (23).

135



Center the clutch plates

48. Visually center the friction plates (6) on the clutch and align theteeth.Pressdownonthecollarassemblytolocktheplatesinplace.Ifnecessary,pull theadjustment lockpintocompressthelockpinspring,androtatetheadjustingyokeassemblyuntil theplatesarelockedinpositionwhenthecollarispresseddown.

Note: Thisisaninitialsettingtoholdtheplatesinplaceuntilaftertheptoismountedontheengine,soitisimperativethat the teeth be exactly aligned and the plates areexactly centered on the clutch.The driving ring maybe used as an alignment fixture to align the teeth and centertheplatesrelativetothehub-and-backplatesotheyareperfectlyalignedwhentheptoisinstalledontheengine.

Wooden block(use3)toholddrivingringin

position

Teeth

Perfectlycentertheclutchinthedrivering.(Thisgapistobeexactly equal

allthewayaround.)

DrivingRing(1)

Bench

Figure 48. Align the Plate Stack

ProceedtoClutchShaftandHousingAssembly.Sevenmainbearinghousingconfigurations are illustrated. Refer to the Twin Disc Power Take-Off Reference Listing in the Description and Specifications section to determine which configuration is used in your PTO.

Skipto:Clutch Shaft and Housing Assembly - Bearing Housing Configuration AClutch Shaft and Housing Assembly - Bearing Housing Configuration BClutch Shaft and Housing Assembly - Bearing Housing Configuration CClutch Shaft and Housing Assembly - Bearing Housing Configuration DClutch Shaft and Housing Assembly - Bearing Housing Configuration EClutch Shaft and Housing Assembly - Bearing Housing Configuration F

136



Clutch Shaft and Housing Assembly - Configuration A


Hex HeadCapscrew

(35)

Washer(36)

RetainerClip(37)

BearingRetainer

(38)

BearingCup(39)

BearingCone(41)

Plug(43)

BearingCone(40)

BearingCup(42)

Fitting(57)

Housing(44)

Figure 49. Illustration - Configuration A

Install main bearings on the clutch shaft

1. Clean the tapered bearing cones (40 & 41) and clutch shaft (33) with isopropyl solvent to remove any oil or grease residue.

Note: Do not use any oil or paraffin based solvents.

137



2. Use an arbor press to install the two bearing cones on the clutch shaft. Install the cones, one from each end, with the back faces (wide section) butting against the shoulder on the clutch shaft. (See note below regarding alternative installation method.)

Note: Special tools are not available from Twin Disc, Inc., but can be fabricated in any capable machine shop.

Note: Use a piece of steel tubing approximately 5 cm. (2 inches) longer than the distance from the end of the shaft to the shoulder and just slightly larger in inside diameter than the bearing cone’s inside diameter. The tubing must not be thick enough to contact the cage of the bearing during installation.

Press Ram

Flat Plate (tool)

Press Tube

Output end ofClutch Shaft (33)

Bearing Cone (41)

Note: I.D. of Press Tube isslightly larger than the I.D.of the bearing.

Note: Thickness ofPress Tube wall mustcontact ONLY theinner race of thebearing.

Note: Bearing mustbe pressed tightagainst the shoulder.

Figure 50. Install bearing cones on the shaft

Note: An alternative method to install the bearing cones is to heat them in an oven at 135° C. (275° F.) for one hour and install them immediately on the clutch shaft. Let the bearing cone cool to room temperature after installation while continuing to apply force as the bearing cools. This is necessary to ensure that it remains properly seated.

Handle the heated parts with care. The heated parts are extremely HOT.

3. After the bearings return to room temperature, coat the bearing rollers and both bearing cups with a light film of clean No. 30 engine oil.

138



Clutch housing

4. Set the clutch housing (44) on the bed of a press with the input end of the housing facing up.

Note: There should be sufficient clearance below the housing to allow for installation of the clutch shaft.

5. Install 2 lubrication fittings (57) if they were removed.

6. Use a round steel plate slightly smaller in diameter than the outer diameter of the rear main bearing cup (42). Place the bearing cup on the housing, back (wide section) face down. Be sure the plate does not press against the bearing cup’s roller contact surface in the cup. Press the cup to the bottom of the bore.


Note: Installation Tip A scrap bearing cup the same size as the one being

installed (42) may be used as an installation tool in addition to a flat plate.

Press bearingcup to bottom ofthe bore.

Press Ram

Flat Plate (tool)

Scrap Bearing Cupused upside down

Housing (44)

New Bearing Cup (42)

Figure 51. Install the rear bearing cup (42)

Install the clutch shaft and bearings into the housing.

7. Carefully install shaft and bearings in the housing. The output end of the shaft must enter the housing first.

Note: DO NOT pre-grease the bearings prior to installation into the housing.

139



8. Installthefrontbearingcup(39)intheboreontopoftheupperbearingcone.Pressittightagainstthecone.

9. Install thebearingretainer(38) inthehousing.Threadthebearingretainertightagainstthebearing.

Note: Thenotchesmustbeup.

(Preliminary setting) Measure and set bearing end play.

The only approved method for adjustment of tapered roller bearings in Twin Disc Power Take-Offs is by use of a dial indicator to read actual bearing end play. This preliminary setting is for assembly purposes only. Final bearing end play must be adjusted as described below in “(Final setting) Measure and set bearing end play.”

10. Tighten thebearing retaineruntil6.8Nm. (60 in.-lbs.)of torque isrequiredtorotatetheshaft.

Note: Donotovertighten!Damagemayoccurtothebearingsorbearingretainer.

Rotatetheshaftseveralrevolutions.Thisalignsandseatsthebearingconesinthebearingcupsandcreatesa“zero”clearance.

11. Notethepositionofanyoneofthenotchesinthebearingretainerrelativetothethreadedholefortheretainerlockcapscrew.

BearingRetainerNotches

Figure 52. Bearing Retainer Notches

140



For side-load applications: Backoffthebearingretainer(38)tocreateaclearancebetweenthe

bearingretainerandbearingcup.Thenotchclosesttothethreadedhole (aligned with or clockwise from the hole) is the first notch.

SP111,SPE111Series:Backoff31/2-41/2notches SP211,SPE211Series:Backoff33/4-43/4notches RFD111,RFD211Series:Backoff2-3notches RB111P301,RB111P302:Backoff31/4-41/4notches RB111P101,RB211P201:Backoff33/4-43/4notches For in-line applications: Backoffthebearingretainer(38)tocreateaclearancebetweenthe

bearingretainerandbearingcup. SP111,SPE111Series:Backoff31/2-41/2notches SP211,SPE211Series:Backoff43/4-53/4notches RFD111Series:Backoff2-3notches RFD211Series:Backoff3-4notches RB111P301,RB111P302:Backoff31/4-41/4notches RB111P101,RB211P201:Backoff33/4-43/4notches

Note: SP111, SPE111, RFD111, RB111 and RB211 Seriesuse the same setting for both side-load and in-lineoperation.

Note: Bump the output end of the shaft with a soft mallethardenoughtomoveandseatthefrontbearingcupupagainst the bearing retainer and create the specified bearingclearanceaftereachadjustmentofthebearingretainer.

Only a preliminary adjustment procedure has been completed by backing off the bearing retainer. The only approved method for adjustment of tapered roller bearings in Twin Disc Power Take-Offs is by use of a dial indicator to read actual bearing end play. Continue to (Final Setting) Measure and set bearing end play to complete the adjustment procedure.

141



(Final setting) Measure and set bearing end play

12. Securelysupporttheunitwiththeclutchshaftinaverticalpositionandtheoutputendup.Besuretheshaftiscleartorotate.

13. Attachaneyeboltinthethreadattheoutputendoftheshaft.Attachahoistwithathrustbearing-equippedswivelhooktotheeyebolt.

14. Securelyattachadialindicatortothehousingandlocatethestemsothetipiscontactingtheendoftheshaftandmovementofthetipisexactlyvertical,thesamedirectionasthemovementoftheshaft.

15. Lift the unit off the supports using the hoist.Apply approximately90.7Kg.(200 lbs.)ofdownwardforceonthebearingcarrierwhiledialindicatorisbeingset.Markaspotontheendoftheshaftnexttothestemasastartingreferencepointandsetthedialindicatorto“zero.”

Figure 53. Measuring and setting bearing end play

142



16. Carefullyandgentlylowertheunitbackontothesupports.Allowthehoisttogoslack.Applyapproximately90.7Kg.(200lbs.)ofdownwardforceon theshaftwhiledial indicator reading isbeing taken. (Theweightoftheshaftwillbeconsideredpartofthe90.7Kg.(200lbs.)Readthedialindicatortoreadactualbearingendplay.

17. Repeatsteps15and16tobesurethedialindicatorreadingrepeatswithaccuracy.Adjustthebearingretainerasnecessarytoobtain0.101-0.178mm.(0.004-0.007in.)bearingendplay.(See note below.)

Note: SP211,SPE211andRFD211only:Forin-lineoperation:Adjustthebearingretainerasnecessarytoobtain0.178-0.229mm.(0.007-0.009in.)bearingendplay.

.18. Oncethebearingendplayadjustmentiscompleted,match-markthe

bearingretainerandbearinghousingsothebearingretainermayberemovedandreinstalledinthesameexactposition.

19. Aftermatch-markingthebearingretainerandbearinghousing,removethebearingretainer(35)andfrontbearingcup(39).

20. Removetheshaftandhand-packthebearingcones(40&42)withgrease specified in the Lubrication specifications in the Maintenance section.SeeinformationregardingFilling the Main Bearing Cavityat initial assembly in the Description and Secifications section of this manual.

Note: Donotpackthebearingcarriercavitywithgrease.Theproperamountofgreasewillbeaddedlater.

21. Reinstalltheshaftwithbearings,frontbearingcupandbearingretainer.Positionthebearingretainerexactlyasitwaspriortoremoval.Realignthematch-marks.

22. Installtheretainerclip(37),hexheadcapscrew(35)andwasher(36).Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

Note: Bumptheoutputendoftheshaftwithasoftmallet(asdescribed in the previous step above) hard enoughto move and seat the front bearing cup up againstthe bearing retainer and create the specified bearing clearance after each adjustment of the bearingretainer.

(Proceed to Install the Operating Shaft and Throwout Yoke)

143



Clutch Shaft and Housing Assembly - Configuration B


Figure 54. Illustration - Configuration B

Install main bearings on the clutch shaft

1. Clean the tapered bearing cones (40 & 41) and clutch shaft with isopropyl solvent to remove any oil or grease residue.


2. Use an arbor press to install the front bearing cone (40) on the clutch shaft. Install the cone from the output end, with the back face (wide section) butting against the shoulder on the clutch shaft. (See note below regarding alternative installation method. )


144



Note: Use a piece of steel tubing approximately 5 cm. (2 inches) longer than the distance from the end of the shaft to the shoulder and just slightly larger in inside diameter than the bearing cone’s inside diameter. The tubing must not be thick enough to contact the cage of the bearing during installation.

Press Ram

Flat Plate (tool)

Press Tube


Bearing Cone (40)





Note: An alternative method to install the bearing cone is to heat it in an oven at 135° C. (275° F.) for one hour and install them immediately on the clutch shaft. Let the bearing cone cool to room temperature after installation while continuing to apply force as the bearing cools. This is necessary to ensure that it remains properly seated.


3. After the bearing returns to room temperature, coat the bearing rollers with a light film of clean No. 30 engine oil.

145



Clutch housing

4. Set the clutch housing (44) on the bed of a press with the input end of the housing facing up.

5. Install 2 plugs (57) if they were removed.

6. Use a round steel plate slightly smaller in diameter than the outer diameter of the front main bearing cup (39). Place the bearing cup on the housing, back (wide section) face down. Be sure the plate does not press against the bearing cup’s roller contact surface in the cup. Press the cup to the bottom of the bore.





Press Ram

Flat Plate (tool)


Housing (44)


Figure 56. Install the front bearing cup (39)

146



Install the clutch shaft and bearing into the housing.

7. Carefully install the clutch shaft and bearing in the housing. The output end of the shaft must enter the housing first.

Note: Pre-grease the bearings prior to installation into the housing.

8. Install the (front) bearing retainer (38) on top of the upper bearing cone. Press it tight against the cone and secure it with six hex head capscrews (35). Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

9. Carefully turn the housing over on the bench. Install the external spacer (59) in the housing, resting against the front bearing cup.

10. Install the internal spacer (58) in the housing, resting against the front bearing cone.

11. Install the rear bearing cup (42) with the wide side down against the internal and external spacers.

12. Install the rear bearing cone, seated securely in the bearing cup.

13. Install the (thick) washer (60), resting against the rear bearing cone.

14. Install the (thin) washer (61) on top of the thick washer.

15. Install the nut (62). Thread it tight against the washer and torque the nut to 655 - 790 Nm (483 - 583 lb. ft.).

Use extreme caution to avoid damaging shaft while holding it secure to allow obtaining proper torque on the nut.

16. Install the seal plate (64) and secure with three capscrews (65). Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.


147



Clutch Shaft and Housing Assembly - Configuration C


OilSlinger

(66)

FrontWear

Sleeve(67)

BearingCarrier

(47)

Hex HeadCapscrew

(48)

O-RingSeal(50)

RearSeal(70)

WearSleeve

(69)

PipePlug(52)

Filler/Breather

(72)

DrainPlug(71)

FrontOil

Seal(68)

BearingRetainer

(38)

Hex HeadCapscrew

(35)

LockPlate(36)

Bearing Cup(42)

BearingCone(40)

Bearing Cup(39)

BearingCone(41)

Shims(63)

Housing(44)

Fitting(57)

Figure 57. Illustration - Configuration C

Clutch Shaft

1. Clean the tapered bearing cones (40 & 41) and clutch shaft (33) with isopropyl solvent to remove any oil or grease residue.


148



2. Use an arbor press to install the two bearing cones on the clutch shaft. Install the cones, one from each end, with the back faces (wide section) butting against the shoulder on the clutch shaft. Use a piece of steel tubing approximately 5 cm. (2 inches) longer than the distance from the end of the shaft to the shoulder and just slightly larger in inside diameter than the bearing cone’s inside diameter. The tubing must not be thick enough to contact the cage of the bearing during installation.

Press Ram

Flat Plate (tool)

Press Tube


Bearing Cone (41)





Note: An alternative method to install the bearing cones is to heat them in an oven at 135° C. (275° F.) for one hour and install them immediately on the clutch shaft. Let the bearing cones cool to room temperature after installation. Continue to apply force as the bearing cools to room temperature ensuring that it remains seated.


149



3. Coat the I.D. of the rear wear sleeve (69) with an anaerobic sealant Twin Disc part number M2828. Press the sleeve onto the shaft. The flat end of the sleeve should be nearest the rear bearing cone. When positioned properly, the contoured side will align exactly with the shoulder of the shaft. Be sure the contour blends in with the shoulder of the clutch shaft. Remove excess sealant when sleeve is in its proper position on the shaft.

Shaft shoulderShaft wear sleeve shoulder

Contour is flush.Wear sleeve

Figure 59. Locating the oil seal wear sleeve on the shaft

Note: The front wear sleeve (67) will be installed on the shaft later in the assembly procedure. It will be installed after final bearing end play is set and the oil slinger is then installed.

Clutch housing

4. Set the clutch housing (44) on the bed of a press with the input end of the housing facing down.

5. Install 2 lubrication fittings (57) if they were removed.

6. Rest the front oil seal (68) in the housing bore; the seal lip should be up, extending toward the bearing carrier. Use a flat steel plate slightly larger in diameter than the O.D. of the oil seal. Press the seal straight into the bore until the steel plate stops against the surface of the housing. The top end of the outer shell of the seal should be flush with the surface of the housing. Pre-lubricate the seal lip with clean No. 30 engine oil.

Note: Press only on the outer shell of the seal. Do not damage the seal lip.

7. Set the clutch housing on a work bench, securely supported with wooden blocks, with the input end of the housing facing down. There should be sufficient clearance below the housing to allow for installation of the clutch shaft.

150



Bearing Carrier

8. Position the bearing carrier (47) on the bed of an arbor press with the input end down.

9. Rest the rear oil seal (70) in the bore; the seal lip should be down, extending toward the input end of the bearing carrier. Use a flat steel plate slightly larger in diameter than the O.D. of the oil seal. Press the seal straight into the bore until the steel plate stops against the surface of the carrier. The rear of the outer shell of the seal should be flush with the surface. Pre-lubricate the seal lip with clean No. 30 engine oil.


10. Invert the bearing carrier (47) on the bench so the input end is up. Use a piece of steel tubing or round plate slightly smaller in diameter than the outer diameter of the rear main bearing cup. Place the bearing cup (42) on the carrier, back face down. Be sure the steel tubing or plate does not press against the bearing contact surface in the cup. Press the cup to the bottom of the bore.


Press Ram

Flat Plate (tool)


Bearing Carrier (47)



11. Pre-lubricate the wear sleeve surface with clean No. 30 engine oil in preparation for installation of the shaft into the bearing retainer.

12. Coat the bearing rollers and both bearing cups with a light film of clean No. 30 engine oil.

151



Install the clutch shaft and bearing cones into the bearing carrier.

13. Place the bearing carrier (47) in a large bench vise with protective jaws or securely support it on a bench with the input end up. There must be sufficient clearance below the carrier to install the shaft. Carefully install shaft and bearings in the bearing carrier. Be careful to not damage the seal lip as the shaft is installed through it.

14. Install the forward bearing cup (39) into the bearing carrier.

15. Install the bearing retainer (38) over the clutch shaft, resting against the bearing cup.

(Preliminary setting) Measure and set bearing end play

16. Use 3 of the 6 hex head capscrews (35) and pull the retainer down evenly until 6.8 Nm. (60 in.-lbs.) of torque is required to rotate the shaft.

Note: Do not overtighten! Damage may occur to the bearings or bearing retainer.

Rotate the shaft several revolutions. This aligns and seats the bearing cones in the bearing cups and creates a “zero” clearance.

17. Measure the shim gap between the bearing retainer and the bearing carrier with a feeler gage. Add a thickness of shims equal to the gap plus 0.102 - 0.178 mm. (0.004 - 0.007 in.).

Note: For in-line operation, add a thickness of shims equal to the gap plus 0.178 - 0.229 mm. (0.007 - 0.009 in.).

18. Remove the three hex head capscrews and the bearing retainer. Install the selected shim pack (63) and reinstall the retainer, 6 hex head capscrews (35) and three lock plates (36). Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

Note: Bump the output end of the shaft with a soft mallet hard enough to move and seat the front bearing cup up against the bearing retainer and create the specified bearing clearance.

Only a preliminary adjustment procedure has been completed by the previous operations. Continue to (Final Setting) Measure and set bearing end play to complete the adjustment procedure.

152




19. Securely support the unit with the clutch shaft in a vertical position and the output end up. Be sure the shaft is clear to rotate.


20. Attach an eyebolt in the 1/4” PTF thread at the output end of the shaft. Attach a hoist with a thrust-bearing-equipped swivel hook to the eyebolt.

21. Securely attach a dial indicator to the housing and locate the stem so the tip is contacting the end of the shaft and movement of the tip is exactly vertical, the same direction as the movement of the shaft.

22. Lift the unit off the supports using the hoist. Apply approximately 90.7 Kg. (200 lbs.) of downward force on the bearing carrier while dial indicator is being set. Mark a spot on the end of the shaft next to the stem as a starting reference point and set the dial indicator to zero.

153



23. Carefully and gently lower the unit back onto the supports. Allow the hoist to go slack. Apply approximately 90.7 Kg. (200 lbs.) of downward force on the shaft while dial indicator reading is being taken. (The weight of the shaft will be considered part of the 90.7 Kg. (200 lbs.)) Read the dial indicator to read actual bearing end play.

24. Repeat steps 22 and 23 to be sure the dial indicator reading repeats with accuracy. Remove the capscrews (35), washers (36), bearing retainer (38) and shims (63), if necessary, to add or subtract shims to obtain the specified bearing end play. When the correct bearing end play has been set and verified, reinstall the components. Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

25. Bend the tabs of the lock plates (36) so they are against the flats of the hex head capscrews.

Note: Bump the output end of the shaft with a soft mallet hard enough to move and seat the front bearing cup up against the bearing retainer and create the specified bearing clearance after each adjustment of the bearing retainer.

Install the oil slinger

26. Invert the shaft unit and support it with the output end resting securely on a solid surface so the press force is carried through the shaft, not against the roller bearings, when the oil slinger (66) and front wear sleeve (67) are installed.

27. Carefully measure the length of the front wear sleeve and mark the shaft at a point below the shoulder equal to that measurement; that is, just above the bearing retainer. Press the oil slinger (66) on the shaft. The flat side will be down toward the bearing retainer, located exactly at the marked location. The lip extension at the I.D. will be up, toward the shoulder.

Oil Slinger(66)

Clutch Shaft(33)

Mark position on shaft andlocate Oil Slinger at the mark.

Figure 62. Mark position of Oil Slinger

154



28. Coat the I.D. of the front wear sleeve (67) with an anaerobic sealant Twin Disc part number M2828. Press the sleeve onto the shaft. The flat end of the sleeve should be tight against the oil slinger. When positioned properly, the contoured side will align exactly with the shoulder of the shaft. Be sure the contour blends in with the shoulder of the clutch shaft. Remove excess sealant when sleeve is in its proper position on the shaft.

Wear Sleeve(67)

Oil Slinger(66)

Clutch Shaft(33)

Figure 63. Proper position of Wear Sleeve and Oil Slinger

Shaft shoulderShaft wear sleeve shoulder

Contour is flush.Wear sleeve

Figure 64. Locating the oil seal wear sleeve on the shaft

Check to be sure the oil slinger is not in contact with the clutch housing.

29. Lift the bearing carrier and shaft using a hoist securely attached to it. Carefully place the bearing carrier and shaft onto the clutch housing (34). Disconnect the hoist.

Note: Do not install the rubber seal (50) at this time.

30. Align the bearing carrier (47) so the breather (72) will be at the top when the pto is installed on the engine, aligned with the instruction cover plate hole.

155



31. Installtwohexheadbolts(48),located180oapart,andtightenthebearingcarriertotheclutchhousing.

32. Slowlyrotatetheshaft.Carefullylistenandfeelforcontactbetweentheoilslingerandtheclutchhousing.TheoilslingerMUSTNOTcontactthehousing.Ifitdoes,removethebearingcarrierandshaftandrepeat step 27bymovingtheoilslingeralittleclosertothebearingretainer.Thenrepeatthisstepasnecessarytoinsurenocontactexists.

Install the shaft and bearing carrier in the main housing.

33. Againremovethebearingcarrier.Placetherubberseal(50)onthepilotofthebearingcarrier.

34. Liftthebearingcarrierandshaftusingahoistsecurelyattachedtoit.Carefullyplacethebearingcarrierandshaftontotheclutchhousing(44).Disconnectthehoist.

Use extreme care to prevent damage to the oil seal as the shaft passes through it. If the seal lip is damaged, replace the seal before proceeding (see step 6).

Complete the assembly of the bearing carrier and shaft unit.

35. Installthedrainplug(71)andbreather(72)inthebearingcarrier.

36. (Laterproductionunits)Installtheoilgaugetube(73)intothebearingcarrier if it was removed. The tube must fit tight enough in the hole so astorequireover133N.(30lbs.)toremoveit.Thetubemustsealintheholesoanoilleakdoesnotoccur.

37. Placethesupportplateinposition(ifused),andsecurethebearingcarrierandsupportplatetotheclutchhousingwitheighthex-headcapscrews (48). Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description andSpecifications section.

156



38. Install two flush pipe plugs (52) at the rear of the carrier. Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

Note: Bump the output end of the shaft with a soft mallet (as described in the previous step above) hard enough to move and seat the front bearing cup up against the bearing retainer and create the specified bearing clearance after each adjustment of the bearing retainer.


157



Clutch Shaft and Housing Assembly - Configurations D, E & F


Figure 65. Illustration - Configuration D

Figure 66. Illustration - Configuration E

158



Figure 67. Illustration - Configuration F

Clutch shaft

1. Clean the tapered bearing cones (40 & 41, or bearings 40 & 41) and clutch shaft (33) with isopropyl solvent to remove any oil or grease residue.


159



Configuration D only: (Configurations E & F skip to step 7.)

2. Use an arbor press to install the two bearings (40 & 41) on the clutch shaft (33). Install the bearings, one from each end, tight against the shoulder on the clutch shaft. Use a piece of steel tubing approximately 5 cm. (2 in.) longer than the distance from the end of the shaft to the shoulder and just slightly larger in inside diameter than the bearing’s inside diameter. (See note below regarding special tools.) The tubing must not be thick enough to contact the cage or balls of the bearing during installation.


Press Ram

Flat Plate (tool)

Press Tube


Bearing (41)




Figure 68. Install bearings on the shaft

Note: An alternative method to install the bearings is to heat them in an oven at 135° C. (275° F.) for one hour and install them immediately on the clutch shaft. Let the bearing cone cool to room temperature after installation while continuing to apply force as the bearing cools. This is necessary to ensure that it remains properly seated.


160



Install the clutch shaft and bearings into the bearing carrier.

3. Place the bearing carrier (47) in a large bench vise with protective jaws or securely support it on a bench with the input end up. There must be sufficient clearance below the carrier to install the shaft.

Note: Pre-grease the bearing prior to assembly.

4. Carefully install shaft and bearings in the bearing carrier. The output end of the shaft must enter the carrier first.

5. Install the bearing retainer (38) in the bearing carrier. Press the bearing retainer tight against the bearing.

Note: The raised side with the internal labyrinth seal grooves must be away from the bearing, against the internal snap ring (75).

This side awayfrom bearing

This side towardbearing

Figure 69. Bearing Retainer

6. Install internal snap ring (75) in the groove in the bearing carrier, contacting against the bearing retainer. (Proceed to step 33.)

161



Configurations E & F only

7. Use an arbor press to install the two bearing cones (40 & 41) on the clutch shaft (33). Install the cones, one from each end of the shaft, with the back faces (wide section) butting tightly against the shoulder on the clutch shaft. Use a piece of steel tubing approximately 5 cm. (2 in.) longer than the distance from the end of the shaft to the shoulder and just slightly larger in inside diameter than the bearing cone’s inside diameter. (See note below regarding special tools.) The tubing must not be thick enough to contact the cage or balls of the bearing during installation.


Press Ram

Flat Plate (tool)

Press Tube


Bearing Cone (41)




Figure 70. Install Bearing Cones on the Shaft

Note: An alternative method to install the bearing cones is to heat them in an oven at 135° C. (275° F.) for one hour and install them immediately on the clutch shaft. Let the bearing cones cool to room temperature after installation while continuing to apply force as the bearing cools. This is necessary to ensure that it remains properly seated.


162



8. After the bearings return to room temperature, coat the bearing rollers and both bearing cups with a light film of clean No. 30 engine oil.

Install the clutch shaft and bearings into the bearing carrier.

Configuration F only: (Configuration E skip to step 10.)

9. Position the bearing carrier with the output end up. Rest the rear oil seal (70) in the bearing carrier bore; the seal lip should be down, extending toward the front end of the bearing carrier. Use a flat steel plate slightly larger in diameter than the O.D. of the oil seal. Press the seal straight into the bore until the steel plate stops against the surface of the bearing carrier. The top end of the outer shell of the seal should be flush with the surface. Pre-lubricate the seal lip with clean No. 30 engine oil.


163



Configurations E & F :

10. Use a round steel plate slightly smaller in diameter than the outer diameter of the rear main bearing cup (42). Place the bearing cup on the housing, back (wide section) face down. Press the cup to the bottom of the bore. Be sure the plate does not press against the bearing cup’s roller contact surface in the cup.





Press Ram

Flat Plate (tool)


Bearing Carrier (47)



11. Carefully install shaft and bearings in the bearing carrier. The output end of the shaft must enter the carrier first.

12. Install the front bearing cup (39) in the bearing carrier bore, securely positioned against the bearing cone.

Configuration E only: (Configuration F skip to step 16)

13. Install the bearing retainer (38) in the housing. Thread the bearing retainer tight against the bearing.

Note: The notches must be up.

164




The only approved method for adjustment of tapered roller bearings in Twin Disc Power Take-Offs is by use of a dial indicator to read actual bearing end play. This preliminary setting is for assembly purposes only. Final bearing end play must be adjusted as described below in “(Final setting) Measure and set bearing end play.”

14. Tighten the bearing retainer until 6.8 Nm. (60 in.-lbs.) of torque is required to rotate the shaft.

Note: Do not overtighten! Damage may occur to the bearings or bearing retainer.

Rotate the shaft several revolutions. This aligns and seats the bearing cones in the bearing cups and creates a “zero” clearance.

15. Note the position of any one of the notches in the bearing retainer relative to the threaded hole for the retainer lock capscrew. Back off the bearing retainer (38) four notches to create a clearance between the bearing retainer and bearing cup. The notch closest to the threaded hole (aligned with or clockwise from the hole) is the first notch.

Note: For in-line operation, back off the bearing retainer (38) five notches.

BearingRetainerNotches

Figure 72. Bearing Retainer Notches

Note: Bump the output end of the shaft with a soft mallet hard enough to move and seat the front bearing cup up against the bearing retainer and create the specified bearing clearance after each adjustment of the bearing retainer. (Proceed at step 22.)

165



Configuration F only:


The only approved method for adjustment of tapered roller bearings in Twin Disc Power Take-Offs is by use of a dial indicator to read actual bearing end play. The preliminary setting is for assembly purposes only. Final bearing end play must be adjusted as described below in “(Final setting) Measure and set bearing end play.”

16. Measurethedistancefromthetopsurfaceofthebearingretainertothetopsurfaceofthebearingcup.Recordthismeasurement.ThisisA.

A Top SurfaceBearing

Cup

Figure 73. Measuring for Shims - Dimension A

17. Measurethedistancefromtheflangeofthebearingretainer(38)tothesurfaceoppositetheoilsealbore.Recordthismeasurement.ThisisB.

B

Surface OppositeSeal Bore

Seal Bore

Figure 74. Measuring for Shims - Dimension B

166



18. Calculate a preliminary shim stack. Subtract measurement B from measurement A. The difference between the two measurements is C.

Select a shim stack that is 0.15 mm. (0.006 in) less than difference C.

19. Install the selected shim stack on top of the bearing cone (39).

20. Install the bearing retainer (38) in the housing bore, tight against the shim stack.

Note: The oil seal bore must be up. (See previous illustration.)

Do not install the seal (68) in the bore at this time. It will be installed later.

21. Install three hex head capscrews (35) with washers (36). Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.


Configurations E & F:


22. Securely support the unit with the clutch shaft in a vertical position and the output end up. Be sure the shaft is clear to rotate.

23. Attach an eyebolt in the thread at the output end of the shaft. Attach a hoist with a thrust bearing-equipped swivel hook to the eyebolt.

24. Securely attach a dial indicator to the housing and locate the stem so the tip is contacting the end of the shaft and movement of the tip is exactly vertical, the same direction as the movement of the shaft.

167



25. Lift the unit off the supports using the hoist. Apply approximately 90.7 Kg. (200 lbs.) of downward force on the bearing carrier while dial indicator is being set. Mark a spot on the end of the shaft next to the stem as a starting reference point and set the dial indicator to “zero.”


26. Carefully and gently lower the unit back onto the supports. Allow the hoist to go slack. Apply approximately 90.7 Kg. (200 lbs.) of downward force on the shaft while dial indicator reading is being taken. (The weight of the shaft will be considered part of the 90.7 Kg. (200 lbs.) Read the dial indicator to read actual bearing end play.

168



27. Repeat steps 25 and 26 to be sure the dial indicator reading repeats with accuracy. Adjust the bearing retainer (or remove the bearing retainer and add or subtract shims) as necessary to obtain the proper bearing end play as shown in Tapered Roller Bearing End Play in the Description and Specifications section. (See note below.)

Note: For in-line operation: Adjust the bearing retainer (or remove the bearing retainer and add or subtract shims) as necessary to obtain the proper bearing end play as shown in Tapered Roller Bearing End Play in the Description and Specifications section.

Configuration E only: (Configuration F skip to step 33)

28. Once the bearing end play adjustment is completed, match-mark the bearing retainer and bearing housing so the bearing retainer may be removed and reinstalled in the same exact position.

29. After match-marking the bearing retainer and bearing housing, remove the bearing retainer (36) and front bearing cup (39).

30. Remove the shaft and hand-pack the bearing cones (40 & 41) with grease specified in the lubrication specifications in the Maintenance section. See information regarding Filling the main bearing cavity at initial assembly in the Description and Operation section of this manual.

Note: Do not pack the bearing carrier cavity with grease. The proper amount of grease will be added later.

31. Reinstall the shaft with bearings, front bearing cup and bearing retainer. Position the bearing retainer exactly as it was prior to removal. Realign the match-marks.

32. Install the retainer clip (37), hex head capscrew (35) and washer (36). Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.


169



Install the bearing carrier unit on the clutch housing.

Configurations D, E & F: 33. Set the clutch housing (44) on a work bench, securely supported

with wooden blocks, with the input end of the housing facing down. There should be sufficient clearance below the housing to allow for installation of the clutch shaft.

34. Lift the bearing carrier and shaft using a hoist securely attached to it. Carefully lower the bearing carrier and shaft onto the clutch housing. Disconnect the hoist. Position the carrier so the grease fitting (51) (or breather (32) if Configuration F) will be up when the clutch housing is in its final position on the engine.

35. Attach the support plate and secure the bearing carrier to the clutch housing with six hex-head capscrews (48) and washers (49). Torque the capscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

36. Install plugs (52) in the bearing retainer holes.


170



Clutch Shaft and Housing Assembly - Configuration G


BallBearing

(40)

BearingCarrier

(47)Hex Head Capscrew

(48)

ExternalSnap Ring

(114)

InternalSnap Ring

(113)

Housing(44)

InternalSnap Ring

(112)

Oil Seal(68)

Shaft(33)

Figure 76. Illustration - Configuration G

Shaft

1. Clean the main bearing (40) and shaft (33) with isopropyl solvent to remove any oil or grease residue.


171



2. Use an arbor press to install the bearing on the shaft. Install the bearing tight against the shoulder on the clutch shaft. Use a piece of steel tubing approximately 5 cm. (2 inches) longer than the distance from the end of the shaft to the shoulder and just slightly larger in inside diameter than the bearing cone’s inside diameter. The tubing must not be thick enough to contact the cage of the bearing during installation.

Press Ram

Bearing

Shaft

Press Bed

TubeFlat Plate

Press bearing tight against

shoulder

Figure 77. Install bearing on the shaft

Note: An alternative method to install the bearing is to heat it in an oven at 135° C. (275° F.) for one hour and install it immediately on the shaft. Let the bearing cool to room temperature after installation. Continue to apply force as the bearing cools to room temperature ensuring that it remains seated.


3. Install the external snap ring (114) in the groove of the shaft.

172



Housing

4. Set the housing (44) on the bed of a press with the input end of the housing facing down. Support the housing on a steel block - minimum 88.9 mm (3.5”) in diameter - located directly beneath the seal bore of the housing

5. Rest the oil seal (68) on the housing bore; the seal lip should be down extending toward the inside of the housing. Use a flat steel plate slightly smaller in diameter than the O.D. of the oil seal. Press the seal straight into the bore until it stops against the steel block support on the inside of the housing. Pre-lubricate the seal lip with clean No. 30 engine oil.


Note: The seal must be pressed straight into the bore.

Note: The seal must be flush with the inside surface of the housing.

Press RamOil SealFlat Plate

SteelSupport

Press Bed

Press until Oil Seal stops against steel

support

Figure 78. Install oil seal in the housing

Install the shaft and bearing in the bearing carrier

6. Place the bearing carrier (47) on a bench with the input end (housing end) up.

173



7. Installtheinternalsnapring(113)inthelowersnapringgrooveofthebearingcarrier.

BearingCarrier

(47)

InternalSnap Ring

(113)

Figure 79. Install shaft in bearing carrier

8. Installtheshaftandballbearinginthebearingcarrierbore.

9. Installthesecondinternalsnapring(112)intheuppergroove.

Install the housing on the bearing carrier

10. Place thebearingcarrierandshaftonabenchwith the inputendup.

11. Lubricatethelipoftheoilseal(68)ifnotpreviouslylubricated.

12. Carefullylowerthehousingontothebearingcarrieraligningthefourboltholes.

Do not damage the seal lip.

174



13. Install the four hex head capscrews (48) and tighten.Torque thecapscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

(Proceed to PTO Final Assembly)

175



Install the Operating Shaft and Throwout Yoke.

SPE111 and SPE211 Series only: (SP111, SP211, SP311, RFD111 and RFD211 Series, skip to step 2.)

1. InstallthetwoCamrols(92)intothethrowoutyoke(54).PositiontheCamrolstowardtheinsideoftheyokeandthenuts(93)ontheoutside.InstallahexnutoneachCamrolandtorquethenutsto17-21Nm(13-16lb.-ft.).

SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 Series2. Positiontheclutchhousingonabenchwiththeinputendfacingup.

Installtheoperatingshaft(55)halfwayintotheclutchhousing.Slipthe throwout fork (54)onto theoperatingshaftandpush theshaftthroughtotheholeontheothersideoftheclutchhousingfarenoughtoexposeoneofthewoodruffkeyslotsatthecenterofthethrowoutfork.

3. Installonewoodruffkey(56)intheoperatingshaft.

ClutchShaft(33)

BearingCarrier(47)

Note positionofthrowoutfork(54)

O p e r a t i n gShaft(55)

Figure 80. Install the throwout fork

4. Pushtheoperatingshafttheotherwaytoexposetheotherkeyslotinthecenterofthefork.

5. Installtheotherwoodruffkey(56).

6. Centertheoperatingforksothehexheadcapscrewswillenterthebottomofthethrowoutforkandthreadintothetopsection.Installthetwohex-headcapscrewsandtighten.Torquethecapscrewstotheproper specifications given in Torque Values for Fasteners intheDescription and Specifications section.

(Proceed to PTO Final Assembly)

176



PTO Final Assembly

RefertotheTwin Disc Power Take-Off Reference ListingintheDescriptionand Specifications section, the exploded views in the IllustrationssectionandEngineering Drawingsnearthebackofthismanual.

Install the clutch/drive spider in the clutch housing.

1. Setupandsupport themainhousingassembly(44)withattachedpartsonthebenchwiththeinputsidefacingup.

Note: Theoutputendoftheshaftmust restsecurelyonasolidsurface.

(RB11PM models only: Thebearingcarriermust restsecurelyonthebench)

177



PTO models with a clutch only: (RB111, RB211 and RB11PM Series, skip to step 12.)

2. Carefullyplacetheclutchassemblyovertheclutchshaftwhile:

A. Aligningthetrunnionsonthecollarwiththethrowoutfork.

B. Aligningthekeywaysinthehub-and-backplatewiththekeywayintheclutchshaft.

Note: BOMs such as SP111C016 and SP211C022 only:Carefully insure that the three plungers are properlypositionedastheclutchisputontheshaft,andthattheyarenotdamaged.

Rotatethrowoutforktoengagetrunnion.

ClutchShaft(33)

ClutchKey(29)Clutch

Output end of theshaft MUST rest andbe in contact with asolid support (Pressbed).

Use several 4” x 4”blocks or othermeans of insuringthe pto does not tipor fall over.

Figure 81. Assemble clutch into Power Take-Off

3. Partiallyinstallthehubkey(32)inthekeyway.Tapthehub-and-backplatewithalarge,butsoftmallet,toseatitonthetaperedsurfaceoftheclutchshaft.

Be sure the output end of the shaft is resting on a solid surface to absorb the force through the shaft rather than through the bearing surfaces.

178



4. Drivethehubkey(32)intopositionslightlybelowthesurfaceofthehub-and-backplate(4).

Note: Donotuseexcessivehammerforcewheninstallingthekey.

5. Installthehubnutlockwasher(3)overtheclutchshaft(33),locatingitstabinthedrilledholeonthehub-and-backplate(4).Installthehubnut(2)andtightenandtorqueto40.7Nm.(30ft.-lb).

6. Tightenthehubnutanadditional150-180degreesclockwise,thenbend a side of the hub nut lock washer up against a flat on the hub nut.

7. Route the flexible hose assembly (19) clear of all moving parts and push the end hose fitting (20) through the hole in the clutch housing.

8. Install the lock washer (21) and jam nut (22) to retain the end fitting (23) in the housing. Torque the capscrews to the proper specifications given inTorque Values for Fasteners in the Description and Specifications section.

Confirm that the hose assembly is not twisted or applying preload to the collar assembly.

9. Install all remainingplugsandexternal componentson thepowertake-off.

Configuration F only:10. Installtheoillevelgauge(74).

179



Center the clutch plates

11. If not previously done, visually center the friction plates (6) on the clutch andaligntheteeth.Pressdownonthecollarassemblytolocktheplates in place. If necessary, pull the adjustment lock pin to compress the lock pin spring, and rotate the adjusting yoke assembly until the platesarelockedinpositionwhenthecollarispresseddown.

Note: Thisisaninitialsettingtoholdtheplatesinplaceuntilafter the pto is mounted on the engine, so it is imperative that the teeth be exactly aligned and the plates areexactly centered on the clutch.The driving ring maybe used as an alignment fixture to align the teeth and centertheplatesrelativetothehub-and-backplatesotheyareperfectlyalignedwhentheptoisinstalledontheengine.

Perfectlycentertheclutchinthedrivering.(Thisgapistobeexactly equal

allthewayaround.)VisuallyalignDrivingRing

relativetohousingbore.

Figure 82. Using the driving ring as an alignment tool

180



RB111, RB211 and RB11PM Series only

12. Carefullyplacethedrivespider(4)(hubofthetorsionalspringcoupling)on the shaft), aligning the keyway of the drive spider with the keyway intheshaft.

Drive Spider SpringTorsion

Coupling

Hub

Figure 83. Drive Spider and Spring Torsion Coupling

13. Partiallyinstallthehubkey(32)inthekeyway.Tapthedrivespider(torsional spring coupling hub) with a large, but soft, mallet to seat it onthetaperedsurfaceoftheshaft.

Note: Donotuseexcessivehammerforcewheninstallingthekey.

14. Drivethehubkey(32)intopositionslightlybelowthesurfaceofthedrivespider(hub)

Note: Donotuseexcessivehammerforce.15. Install the hub nut lock washer (3) over the shaft (33), locating its tab

inthedrilledholeonthehub.

16. (Ifused)installthespacer(117)ontopofthelockwasher.

17. Installthehubnut(2)andtightenandtorqueto40.7Nm.(30ft.-lb).

18. Tighten the hub nut an additional 150 - 180 degrees clockwise, then bend a side of the hub nut lock washer up against a flat on the hub nut.

181



Models RB11PM Series only:

19. Install the oil fill cup (72), oil level check plug (115) and oil drain plug (71)inthebearingcarrier.

Models RB211 Series only:

20. Installthecouplingonthehubwiththeraisedspringportiontowardthe insideof thehousing justprior to installationof theunitontheengine.

182



Final assembly and lubrication.

21. Installthepowertake-offaccordingtoinstructionsintheInstallation section ofthismanual.

22. AdjusttheclutchaccordingtoClutch AdjustmentintheMaintenancesectionofthismanual.

23. FillthemainbearingcavitywithgreaseoroilaccordingtoFilling the Main Bearing Cavity during initial assembly in the Descriptionand Specifications section and Lubrication specifications in the Maintenancesectionofthismanual.

24. Lubricate the remainder of the pto according to lubrication specifications in the Description and Specifications section of this manual.

25. Placetheinstructioncoverplate(45)inpositiononthehousingandsecurewith2hex-headcapscrews5/16”-18x1/2”(46).Torquethecapscrews to the proper specifications given in Torque Values for Fasteners in the Description and Specifications section.

26. Installtheshaftkey(34)andallpartspreviouslyremovedfromtheoutputendoftheclutchshaft.

183

Twin Disc, Incorporated Illustrations


Illustrations

List of Illustrations

The following pages include illustrations that are specific to thse models. The illustrations included are listed below.

Note: Any part numbers listed in the following illustrations are for reference only. Please refer to your bill of material for part numbers specific to your model.

Parts Identification List - SP111, SPE111, SP211, SPE211, SP311, RFD111 and RFD211 Series

Exploded View (SPE111 and SPE211 Series Clutches)

Exploded View (SP111C016 and SP211C022 Clutches)

Exploded View (Configuration A)

Exploded View (Configuration B)

Exploded View (Configuration C)

Exploded View (Configuration D)

Exploded View (Configuration E)

Exploded View (Configuration F)

Exploded View (Configuration G)

Exploded View (SPE111 and SPE211 Series Throwout Mechanism)

184

Twin Disc, IncorporatedIllustrations


Parts Identification List - SP111, SPE111, SP211, SPE211, SP311, RFD111, RFD211, RB111, RB211 and RB11PM Series

1 Pilot Bearing 12 Nut 13 Washer 14 Hub-and-back plate 15 Ring, drive 16 Plate, friction 1,2 or 37 Plate, center 1 or 28 Plate, pressure 19 Lever 310 Washer (lever to pressure plate) 311 Pin, clevis (lever to pressure plate) 312 Pin, cotter (lever to pressure plate) 313 Cotter pin (or washer) (lever to link) 314 Pin, clevis (lever to link) 315 Link 316 Pin, clevis (link to sleeve) 317 Clevis pin (link to sleeve) 318 Fitting 119 Hose 120 Fitting 121 Washer 122 Nut 123 Fitting, grease 124 Spring, compression 125 Pin 126 Yoke, adjusting 127 Sleeve, sliding 128 Collar assembly (collar) 129 Ring, snap-external 1

30 Bearing, ball 131 Ring, snap-internal 132 Key-clutch 133 Shaft, clutch 134 Key-output 135 Capscrew, hex-head 1 or 636 Washer 1 or 637 Retainer, clip 138 Retainer, bearing 139 Bearing, cup-front 240 Bearing, cone-front (or bearing-qty. 1) 241 Bearing, cone-rear (or bearing-qty. 1) 242 Bearing, cup-rear 243 pipe plug or ball 144 Housing 145 Plate, instruction 146 Screw, machine 247 Carrier, bearing 148 Screw, hex-head 649 Washer 650 Seal 151 Fitting 152 Plug 2 or 353 Hand lever assembly 154 Throwout yoke 155 Shaft, operating 156 Key, woodruff 257 Fitting (or plug) 258 Spacer, internal 1

Item Description Qty. Item Description Qty.

185



Parts Identification List - SP111, SPE111, SP211, SPE211, SP311, RFD111, RFD211, RB111, RB211 and RB11PM Series

Item Description Qty. Item Description Qty.

59 Spacer, external 160 Washer 161 Washer 162 Nut 163 Shims ar64 Seal Plate (or rear bearing retainer) 165 Capscrew 366 Oil Slinger 167 Sleeve, wear-front 168 Seal, oil-front 169 Sleeve, wear-rear 170 Seal, oil-rear 171 Plug, pipe 172 Breather 173 Oil gauge tube 174 Gauge, oil 175 Snap ring, internal 176 Spring, inner (not shown) 3 or 477 Spring, outer (not shown) 3 or 478 Seal, o-ring 179 Snap ring 180 Neutral Lock Arm 181 Spring, Compression 182 Roller Pin 183 Retaining ring 184 Roller Detent 185 Washer 186 Hex Head Capscrew 187 Hex Head Capscrew 1

88 Detent Locator 189 Clevis Pin 190 Stop, roller 291 Screw, set 292 Bearing, Camrol 293 Hex Nut 294 Plunger 295 Spring 296 Wear Pad 297 Plunger 198 Spring 199 Wear Pad 1100Plunger 2101Spring 2102Wear Pad 2103Shoulder Screw 3104Washer, shoulder screw 3105Washer 3106Hex Nut 3107Washer 6108Shoulder Screw 3109Washer, shoulder screw 3110 Hex Nut 3111 Spring, conical 1112 Snap Ring, internal 1113 Snap Ring, internal 1114 Snap Ring, external 1115 Check plug, oil level 1116 Rubber Block 20117 Spacer 1

186



Exploded View (SP111 and SP211 Series Clutches)

Note: Typical unit illustrated.

Typical SP111 Series Clutch with Bronze Throwout Collar

Typical SP211 Series Clutch with Ball-Type Throwout Collar

187



Exploded View (SP111C016 and SP211C022 Clutches)


188



Exploded View (Configuration A)


189



Exploded View (Configuration B)


190



Exploded View (Configuration C)


191



Exploded View (Configuration D)


192



Exploded View (Configuration E)


193



Exploded View (Configuration F)


194



Exploded View (Configuration G)


44

48

113 114 40112

68 47

321

116

4Drive Spider

3332

195



Exploded View (SPE111 and SPE211 Series Throwout Mechanism)


196



197

Twin Disc, Incorporated Engineering Drawings


Engineering Drawings

The engineering drawings included are listed below.

Note: All part numbers listed in the following engineering drawings are for reference only and illustrate most of the variations found in the SP111, SP211, SP311, RFD111 and RFD211 Series PTOs. Please refer to your bill of material for part numbers specific to your model.

SP111HP SP111P203 Sheet 2 of 2

SP111HP SP111P204 Sheet 2 of 2 (Configuration A)

SP111P SP111P206 Sheet 2 of 2 (Configuration B)

SPE111HP SP111P325 Sheet 2 of 2



SP211OP SP211P204 Sheet 2 of 2 (Configuration C)

SP211P SP211P205 Sheet 2 of 2

SPE211HP SP211P213 Sheet 2 of 2

SP211P SP211P225 Sheet 2 of 2

SP311IL SP311P101 Sheet 2 of 2 (Configuration D)

SP311P SP311P301 Sheet 2 of 2 (Configuration E)

SP311OP SP311P306 Sheet 2 of 2 (Configuration F)

Contact your Authorized Twin Disc Dealer

for the latest BOM and engineering drawings.

198

Twin Disc, IncorporatedEngineering Drawings


SP111 Clutch SP111C016 Sheet 2 of 2

SPE111 Clutch SP211C015 Sheet 2 of 2

RB111P RB111P101 Sheet 2 of 2

RB211P RB211P201 Sheet 2 of 2

RB11PM XA7518 (Configuration G)

56


EC300 Marine Control System Confi guration/Troubleshooting Manual #1020XXX

#1022762

TWIN DISC, INCORPORATED RACINE, WISCONSIN 53403, U.S.A. 262-638-4000/262-638-4482 (FAX) WWW.TWINDISC.COM

Red Back_cover.indd 56 8/10/2010 10:23:46 AM

Documents

Twin Disc Pto_1022762