Eaton Complete Transaxle Repair Guide - Ea11wh

8/6/2019 Eaton Complete Transaxle Repair Guide - Ea11wh

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3/4/500 EATON 11 HYDROSTATIC TRANSMISSION - WH TRANSAXLE

Table of Contents Page 1 of 2

FOREWORD

SPECIFICATIONS

TRANSMISSION:

TRANSAXLE: MAINTENANCE:

GENERAL INFORMATION

TRANSMISSION DESCRIPTION AND IDENTIFICATION MARKINGS

PRINCIPLES OF OPERATION

TRANSMISSION SYSTEM

SYSTEM OPERATION

TRANSMISSION OPERATION

TROUBLESHOOTING PROBLEM DIAGNOSIS

GENERAL SYSTEM CHECKS

OIL SYSTEM

COOLING SYSTEM

ENGINE AND INPUT DRIVE

MOTION CONTROL LINKAGE

TRANSAXLE

HYDROSTATIC TRANSMISSION

TROUBLESHOOTING GUIDE

TRACTOR WILL NOT OPERATE IN EITHER DIRECTION

TRACTOR OPERATES IN BOTH DIRECTIONS, BUT LOSES POWER AS OIL

TRACTOR DOES NOT RETURN TO NEUTRAL.

HYDRAULIC LIFT SYSTEM DOES NOT OPERATE

ADJUSTMENTS

GENERAL

SINGLE ACTION BRAKE BAND ADJUSTMENT

DUAL ACTION BRAKE BAND ADJUSTMENT

MOTION CONTROL FRICTION

NEUTRAL

TESTING

SYSTEM PERFORMANCE

PRESSURE CHECKS

IMPLEMENT LIFT SYSTEM

CHARGE PRESSURE


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3/4/500 EATON 11 HYDROSTATIC TRANSMISSION - WH TRANSAXLE

Table of Contents Page 2 of 2

REPAIR OPERATIONS

GENERAL INFORMATION

HYDRAULIC HOSES - HYDRAULIC LIFT CONTROL VALVE

REMOVAL

INSTALLATION

TRANSMISSION

REMOVAL

PULLEY, GEAR AND CAM PLATE REMOVAL

INSTALLATION

TRANSAXLE

IN-VEHICLE SERVICE

CASE HALF SERVICE

INTERMEDIATE GEAR AND DIFFERENTIAL SERVICE

TRANSAXLE REASSEMBLY

TRANSMISSION SYSTEM

REMOVAL

INSTALLATION

INTERNAL TRANSMISSION SERVICE

TRANSAXLE

TRANSAXLE

TRANSMISSION AND FILTER


MOTION CONTROL, CLUTCH LINKAGE

MOTION CONTROL, CLUTCH LINKAGE

BRAKE AND LINKAGE SINGLE ACTION BRAKE BAND

BRAKE, AND LINKAGE SINGLE ACTION BRAKE BAND

BRAKE AND LINKAGE DUAL ACTION BRAKE BAND

BRAKE AND LINKAGE DUAL ACTION BRAKE BAND

EATON MODEL 11 TRANSMISSION


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TRANSMISSIONREPAIR MANUAL

Printed in U.S.A. 1186 Form 1492-4205 PART NO. 810243R


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FOREWORDThis service and repair manual hasbeencompiled toprovide

authorized Wheel Horse service personnel with the proper proceduresand techniques forservicing he Wheel Horse automatic ransaxlewith EatonModel 1 1 hydrostatic ransmission.

The following Table of Contentsists al l areascovered. It isadvisable to read all of the introductory sections first to gain a properunderstanding of the Wheel Horse automatic ransmission system.

The automatic transmission and transaxle are sophisticatedpiecesof machinery. Maintain strict cleanliness control during all stages ofservice and repair. Cover or cap all hose ends and fittings wheneverthey are exposed. Even a small amount of dirt or other contaminationcan severely damage the system.

This manual covers the transmissionsystemas used during the1980-87 model year. It may be used to the extent applicable for latermodel ractorsequipped with theEaton Model 1 1 hydrostatic rans-mission and Wheel Horse ransaxle.


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SPECIFICATIONSTRANSMISSION: Eaton Model 11 ; Radial,Ball-pistonDisplacement:

Pump and Motor with Auxil iary Charge Pump.Pump, Variable 0-1.10 cu. in/rev.Motor, Fixed. 2.09 cu. in./rev.Input 3400 RMP

Torque Output (Max.)

Speed (as used):Output 0-1750 RPMContinuous 360 in. Ibs.Intermittent 540 in. Ibs.Maximum Continuous 18OoF8 Diameter Fan Plus O il Flow From Charge Pump10 Micron, Full-flow, Spin-on Type3.8 GPM Free Flow1.4 GPM @ 700 PSI

Operating Temperature:Cooling:Oi l Filter (as used)Charge Pump (3400 RPM Input)

TRANSAXLE: Wheel Horse; Single-speed, with Uni-Drive 8-pinion Differentia l and Double ReductionGears.Heat-Treated SteelBall 2Needle 6Cast Iron3, Double- lip, Spring-loadedDrive Belt Pulley Ratio 1:lOverall Reduction Ratio 15.64:lAxle Shaft Speed:

@ 1750 RPM Eaton Output 1 1 2 RPMTractor Speeds (approx.):Forward 0-7MPHReverse 0-4.2 MPH

Gears and ShaftsBearings:

Case Halves and Hubs:Seals:Ratios and Speeds:

MAINTENANCE:Oil Check Before Each UseReplace Oil and Filter:

Initial After First 100 Hours of UsePeriodic Once a Year, or After Every 100 HoursOi l SpecificationOi l Capacity (approx.) 5 quartsOi l Filter Wheel Horse 108335Adjustments

of Use, Whichever Occurs First1OW-30 or 1OW-40 Premium Motor O il

Foot/Parking BrakeMotion Control Friction As RequiredMotion Control NeutralTorque Value (Thread Sizes)1/4-20 8 ft. Ibs.5/16-18 17-22 ft. Ibs.3/8-16 30-35 ft. Ibs.1/2-135-13 75-80 ft. Ibs.WheelHub SetScrew 28-32 ft. Ibs.


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GENERAL INFORMATIONTRANSMISSIONDESCRIPTION ANDIDENTIFICATIONMARKINGSNOTE

This manual uses the terms transmission,hydrostatic transmission] and hydrostatic unit"to refero the Eaton Model 11 HydrostaticTransmission. The term "transaxle" i s used torefer o the assembly of intermediate gears,differentialand casehalves,ess hydrostaticunit. "TransmissionSystem" and "AutomaticTransmission System" are used to refer to en-tire drive tra in as an assembly, including en-gine,ransmission,ransaxle, hydraulic liftsystem, and all related parts.

The Eaton Model 1 1 hydrostatic transmission,asused by Wheel Horse, i s equipped withan internalcharge ressure relief valve, forw ardand reversecheck :and acceleration valves, and vibrat ion dampen-ing pistons.Transmissionhas a splined output shaftand keyed input shaft, both of which are supportedbyball bearings. Besides makingup for normal in-ternal transmission eakage, charge pump i s used tooperate tractor's hydraulic lift system. Charge pres-sureused to operate transmission i s 30-90 PSI, regu-lated by a relief valve inside transmission. Implementlift systempressure i s 700 PSI, regulated by a reliefvalve in hydraulic lift control valve.Transmission i s stamped with model number, manu-facturing date code, and direction of rotation. Rebuiltunits are also marked with a "1". If viewed romangle used in photo, this information will appear

upide-downs-n Figure 2.

RADIALALL-PISTONOTORADIALALL-PISTONUMP

CHECK VALVE(TWO USED)

SHAFT

CONTROL SHAFT(CONTROLS TRANSMISSION OUTPUTSPEED AND DIRECTION CHARGEIMPLEMENTOF ROTATION-SHAFT POINTSUP WHEN INSTALLED IN WHEEL

HORSE TRANSAXLE)

CHARGE PUMPPRESSURE 30-90 PSII LIFT PRESSURE 700 PSI

FIG. 1. Internal TransmissionFeatures

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DIRECTION OF INPUT SHAFT

MANUFACTURING DATE

FIG. 2. Identification Ma rkings

PRINCIPLES OF OPERATIONT R A N S M I S S I O N S Y S T E M

Major parts of Wheel Horse automatic transmissionsystem are denti fied n Figs. 3-5.

FIG. 3. Rightide

FIG. 4. left Side

FIG. 5. ControlsSYSTEM OPERATION

Transmission input shaft i s driven at engine speedbydrive belt. Both charge pumpand transmissionpump are driven by nput shaft. Charge pump drawsoil from transaxle to"supercharge "transmission pump,make up for normal nternal leakage, and provide acooling oil low .Oil travels from outlet of chargepump through a hydraulic hose, passes through open-center hydraulic lif t valve and out to oil f ilter adapterthrough another hose. After filtering, oil passesthrough a metal ine and nto transmission.

Pumpsection of transmissioncontrols volume anddirection ofoil low to motor section depending onposition of motion control linkage. A s motion controllever i s moved away from neutral position flow of oili s increased to motor, making it go faster. Motor out-put shaft drives tractor axles through two reductiongears and a differentia l assembly. Torque i s generat-ed in direct response to load; higherpump pressure(torque) i s generated as resistance to movement in-creases.

For optimum performance engine should be operat-ed at ull throttle, and never less than 3/4 throttle.Under high oad conditions tractor should be slowedusing motion control lever, which will increase outputtorque. This i s due toowerrictionandpumpinglosses at slower transmission output speeds, and canbe compared to the effect of shifting a manual trans-mission to a lower gear.System flow i s illustrated in Figs. 6 and 7 .

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FIG. 6. Oil Flow to HydraulicValve


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Hydraulic lift circuit is also operated by chargepump. When lift control valve i s moved to RaiseorLower position, charge pump output i s diverted to oneof hoses attached to lift cylinder. Other hose i s con-nected through control valve to charge pressure hoseleading to oil filter, permitting bleed-off of oil on thatside of lift cylinder'spiston. Implement reliefvalvelocated in control valve regulates lift system pressureto 700 PSI. When this valve opens excess oil i s bled offinto charge pressure hose leading to oi l filter.

TRANSMISSIONOPERATIONFlow diagrams show hydraulic circuits inside hydro-static unit and illustrate high and ow pressure areasduring operation (Fig. 8 and 9) .Pressurized oil rom charge pump i s maintainedbetween 30 and 90 PSI by charge relief valve locatedinside hydrostatic unit. When valve opensexcess oilpressure i s bled back to transaxle sump through open

ball bearing on output shaft. Charge pump oil enterstransmission pump section, which i s turning at enginespeed, and "supercharges" it.Operator controls ransmission bymoving controlshaft connected to cam ring within pump. With con-trol shaft in neutral, or ts centered position, no flowi s generated by pump and therefore motor portionis at rest.When control shaft i s moved from neutral in "for-ward" direction, cam ring in pump i s moved off cent-

er and pump ball-pistons create a flow of fluid. Posi-tionof control shaft/cam ing i s infinitelyvariableandany flow rate i s possible up o maximum camring movement/maximum pump displacement.Flow created by pump moves to fixed displacementmotor through internal passageways. Because motori s a fixed displacement unit, motor requires a specificvolume of flu id fo r it o make one complete revolution.

TRANSAXLESUMP

RADIAL BALL-PISTONHYDRAULIC MOTOR(FIXED DISPLACEMENT)

I FORWARD/REVERSE MOTIONCHECKALVESHAFT I

ACCELERATIONVALVES HYDRAULICPUMP I

\II

RADIAL BALL-PISTONHYDRAULIC PUMP(VARIABLE DISPLACEMENT)

I

HYDRAULIC LIFT CONTROL TRANSMISSION CHARGE PRESSURE 30-90 PSIVALVE, WITH 700 PSI RELIEF VALVE IMPLEMENT LIFT SYSTEM PRESSURE700 PSI

FIG. 8. HydrostaticTransmission Flow Diagram

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Whencontrol shaft i s moved from neut ral o "re-verse" direction, cam ring i s swung o ff center to op-posite side of pump and flow frompump s "reversed".This flow i s directed to other side of motor causing tsoutput shaft to rotate in opposite direction. Pump inputshaft always rotates in one direction, dictated by en-gine, while motor output shaft rotates in either direc-tion depending on direction of flo w fro m pump.Pumpdischarge flow is high pressure (dictated byload) fluid. Flow returned from motor to pump i s lo w(orcharge)pressure fluid.

Internal accelerationvalves are used i n both or-ward and reverse directions. These valves are springloaded to close "slowly" as pressure (load) increases.These valves control rate of acceleration of motor out-put shaft,assist in pro vid ing a positive neutral, andpermit hand pushing tractor without operating engine.In operation, asractor's motion control lever i smoved out of neutral, appropriate acceleration valvebleeds off some of the high pressure oi l before it closes.This initial temporary pressureeductionesults insmoother tractor acceleration from astand-still.

Due tonternal leakage, flui d being returned ton- Model 1 1 has two dampening pistons, which restlet side of pump from exhaustside of motor i s less againstcam ringandare controlled by systempres-than required by pump. To replace this needed fluid, sure. In operation they educe control shaft vibrat ioncheck valves are located in each ide of closedoop. and transmissionnoise.The check valve located on low pressure side of pumpwi ll open allowing luid o enter oop, from chargepump circuit, to make up leakage losses.

HIGH PRESSUREPISTON LOW PRESSURE (30-90 PSI)TRANSAXLE SUMPLIFT SYSTEM PRESSURE (700 PSI)

FIG. 9. System Pressure Schematic

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TROUBLESHOOTINGPROBLEM DIAGNOSIS

To save time and expense, a systematic approachshould be used when troubleshooting any transmis-sion problem, starting with a thorough understandingof how the system operates. Trouble symptoms shouldbe carefully noted and compared to TroubleshootingGuide.Whenever a problem occurs ALWAYSCHECKTHESE

ITEMS FIRST:1. Transmission oil level and condition.2. Motion control linkage.3. Gaskets, eals, oi l lines and fittings.4. Transmission drive belt, pulleys andtransmission clutch.5 . Owner modifications to transmission system.

GENERAL SYSTEM CHECKSOILSYSTEM

1 . Check oil level when cold; overfilling transaxlesump reduces the available expansion area andmay result in overflow at operating temperature.A low oil level wil l cause erratic operation andmay cause permanent damage to the hydro-static unit. Replace leaking seals and gaskets.2. Check color of oil; if natural color has changedto black, overheating i s indicated. If oi l is amilkywhite color, water contamination i s in -dicated. Change ransmission oil and fi lte r be-fore further operation or tests.3. Oil filters that have not been replaced at specifi-ed interval can become clogged and cause lossof power, overheating or non-operation.4. Check tightness ofall mounting bolts and oi lline fittings. Ai r can enter system without hav-inganoil leak.

COOLING SYSTEMI . Cooling systemconsists of cooling fan, cast finsin the aluminum transmission cover, andoi l

circulated by the charge pump. Fan, cover ins,and area surrounding transmission houldbekept clean for maximum cooling efficiency. Re-place a broken orcracked cooling fan.

ENGINE AND INPUTDRIVE1 . Check engine for correct no-load RPM.2. Run engine at oad and check forproper per-3. Check drive belt,ransmission clutch, ulleys,formance.keys and keyways.

MOTION CONTROLLINKAGE1 . Check condition of all linkage nd securinghardware. Replace worn parts to minimize freemovement.2. Check for damage or binding parts that prevent3. Check motion control frictionandneutral ad-

full orwardand reverse travel.justments.

4. Check condition of control arm, key and trans-mission control shaft.TRANSAXLE

1 . Roll tractor slowly and check for unusual noisesor seizing.2. Check fordifferentia l action and smooth oper-ation of gear train. This can be done by raisingrear of tractor and holding one wheel station-arywhi le turning other wheel. If necessaryopen transaxle and inspect gears, bearings, keysand keyways.

HYDROSTATICTRANSMISSION1 . Rear wheels should "lock up" if tractor i s pushedat about walk ing speed. This i s a rough checkof transmission condition. If all other parts ofthe system are good and tractor'swheels donot lock, it i s likely that transmission has exces-sive internal wear or an internal ailure. Con-duct a charge pressure and power test.

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TROUBLESHOOTING GUIDETRACTOR WILL NOT OPERA TE IN EITHER DIRECTION

IF THE HYDRAULIC LIFT SYSTEM OPERATES NORMALLYTHE TRANSMISSION CHARGE PUMP ISWORKING.

CHECK MOTIONCONTROL LINKAGEII I IFAULTY

ADJUST, REPAIR REPAIR ORPROPER LEVEL OR REPLACE REPLACE

CHECK CHARGE REPLACE HYDROSTATIC.OK-PRESSUREAcceleration ValvePossible Defects:TRANSMISSION

Stuck OpenBoth Check Valves

Stuck OpenHigh InternalLeakage Due toWear/Contamination

Mechanical Failure

LOW

INSPECT FITTINGS,LINES, HOSES, HYDRAULICLIFT VALVE FOR BLOCKAGE OIL FILTERINSPECT

FAULTY CLOGGED

REPAIR ORREPLACE REPLACE

REPLACE HYDROSTATICTRANSMISSIONPossible Defects:

Charge ReliefValve Stuck OpenFaulty Charge Pump*

High InternalLeakage Due toWear/ContaminationMechanical Failure

'Charge Pump Can be Damaged by Improperly Set Implement Relief Valve. See "Charge Pressure Check"

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TRACTOR OPERATES IN BOTH DIRECTIONS, BUT LOSESPOWER AS OIL BECOMES HOT.TRANSMISSION OVERHEATS

CHECK OILCONDITION COOLING FINS

LOW OF FAULTYI TRACTOROVERHEATING DlRTYVERLOADEDOR WATER I IPROPER LEVELNDILTERLEANRANS. MAINTAIN FULLENGINE RPM,REDUCE SPEEDAND LOAD

CHECKHARGEAKE PERFORMANCEESTRANSMISSIONProbable Defect:

High InternalLeakage Due toWear/Contamination

TO CONFIRM LOWPOWER CONDITION

INSPECT FITTINGS, LINES,VALVE FOR PARTIALBLOCKAGE

INSPECT REPLACE HYDROSTATICHOSES, HYDRAULIC LIFTCharge Relief Valve

Possible Defects:TRANSMISSIONIL FILTER

LeakingFaulty Charge Pump*

Internal LeakageDue to Wear/Contamination

CLOGGED

*Charge Pump Can be Damaged by Improperly Set Implement Relief Valve. See Charge Pressure Check.

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TRACTOR DOES NOT RETURN TO NEUTRAL.TRACTOR OPERATES NORMAL LY IN ON E DIRECTION,BUT IS VERY SLOW IN OPPOSITE DIRECTION.

TRACTOR OPERATES IN ONLY O NE DIRECTION.

CHECKNEUTRALADJUSTMENT

FAULTYI INCORRECTIIADJUST, REPAIROR REPLACEEUTRAL

-0KPossible Defects:One Check Valve

Mechanical Failure

TRACTOR OPERATES ERRATICALLYCHECKOTIONHECKNPUT CONTROL LINKAGE

FRICTION ADJUSTMENTFAULTY

ADJUST,EPAIR OR REPLACE OR REPLACE I

REPLACE HYDROSTATICTRANSMISSIONPossible Defects:Check Valve orAccelerationValves StickingPeriodically

Acceleration ValveClosing too Slowly


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HYDRAULIC LIFT SYSTEM DOES N OT OPERATE,OR DOES NOT OPERATE PROPERLY;TRACTOR OPERATES NORMA LLY.

CONTROL VALVE,CYLINDER,NDIFTYSTEMEPLACE

HOSESRESSURE LIFTYLINDER

LOW

PROPEREVEL CONTROL VALVELOW

CHECK IMPLEMENTLIFT SYSTEMPRESSUREI

OIL FILTERHYDRAULIC LIFTVALVE FOR PARTIAL

FAULTYREPAIR OR REPLACE

IREPLACE LOWHYDROSTATICTRANSMISSIONProbable Defect:Charge Pump CanNot Develop FullOutput'

'Charge Pum p Can be Dam aged by Improperly Set Implem ent Relief Valve. See "Transmission Pressure Checks".

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DUALACTIONBRAKEBANDADJUSTMENTADJUSTMENTSGENERAL

Brake drum i s mounted on first intermediate gearshaft, which extends througha needle bearingandseal in left transaxle case half. Brake band i s appliedby rods connected to Brake/Return to Neutral pedal.Brake i s appliedonlyafter transmission is returnedto neutral, and i s used to keep tractor from ollingafter it has been stopped. Brake also serves as trac-tor's parking brake.

SINGLEACTIONBRAKEBANDADJUSTMENTTo adjust brake band, depress brake pedal and setparking broke lever so it latches in firstnotch of return-to-neutral cam plate. Turn brake drum mounting bo ltclockwise with a torque wrench. Drum should turnwhen 30-35 t. Ibs. i s applied to bolt. Use adjustmentnut to increaseordecrease ensionas required. DONOT OVERTORQUE.

FIG. 10. EARLYMODELBRAKE BAND

To adjustbrake band,depress brakepedal andset parking brake so it latches in first notch of camplate. Tighten adjustment nut and compress springal l the way. Back nut off 1/2 turn. Brake band shouldnot drag on drum when released.

FIG. 11. ate Mo del Brake BandMOTION CONTROL FRICTION

Motion control lever should move when approxi-mately 6 Ibs. of pressure i s applied o it. A hole isprovided i n tractor's rear fender fo r access to themotion control friction adjustmen t Tighten or loosenadjustment nut as required.

FIG. 12A.Early Model FrictionAdjustment


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FIG. 12B. Late Model Friction AdjustmentN E U T R A L

To test neutral adjustment tractor should be broughttoa stop from both directions on a level surface,using Brake/Return to Neutral pedal. Once tractor i sstopped, eleasepedal. If tractor "creeps" in eitherdirection, neutral adjustment i s necessary1. If applicable, disconnect wiring as required and

remove seat and rear fender on ear ly modelsonly (Fig. 12).2. Support rear of tractor so both wheels are offground.3. Start engine and run at ful l throttle. Move mo-tion control lever forwardan dwait ordrivetrain to reach normal operating temperature.4. Depress brakepedal fullyand release.5. Slightly loosen lock boltand urn large eccen-

t r ic with a wrench until rear wheels stop turn-ing. Turneccentric in opposite direction. untilwheels start turning, then set eccentric mid-waybetween these two positions.6. Tighten lock boltand retest fo r neutral, fromboth directions, at ul l throttle.

FIG. 13. Neutral Adjustment7 . if tractor can not be neutralized in both direc-tions wi th eccentric, control rod .length shouldbe reset and neutral then re-adjusted:

A) Remove control cover plate (Fig. 14).B) Set parking brake.C) Disconnect front end of control rodrom

motion control arm.

D) Adjust position of cam plate so that rightedge of friction washer i s even with rightend of slot in cam plate.E) Adjust rod end on control rod so thatboltenters hole in control arm exactly at a rightangle (square) to it.F) If a satisfactory neutral st i l l cannot beob-tained, check linkage for wear or damage.

8. Afterneutral hasbeenset, check that motioncontrol lever i s centered in notch of detentspring. Spring has slotted bolt holes so it maybe adjusted to ineup notch wi th lever.Beltcover and control cover plate in front of seatmust be removed to make this adjustment.9. If applicable, reinstall fender and seat.Recon-nect wiring.

FIG. 14. Detent Spring AdjustmentTESTINGSYSTEM P E R F O R M A N C E

A test for observing transmission system perform-ance under load can be helpful when checking a "lowpower", or "tractor loses power" condition.1. Operate tractor to bring engine and drive rainto normal operating temperature.

2. Anchor rear of tractor to an immoveable object(tree, beam, etc.) wi th a chain secured to trans-axle case.Rear wheels must be on a high f r i c -tion surface, suchs unfinished concrete orasphalt. Front wheels may be placed against acurb or wall as an alternative, but provisionmust be made to keep front of ractor on ground.3. Set engine athalf hrottle and move motioncontrol lever ful ly forward. Tractor should haveenough power to spin rear wheels withanoperator in seat.4. If wheels do not spin, carefully note engine,drive belt, and transmission/transaxle perform-ance to isolate problem.5 . If test results are marginal, tractor should beused under actual operating conditions o isolate

problem.P R E S S U R E C H E C K S

Perform pressurechecks at locationsdescribed be-low. Do not connect a pressure gage in a way thatcuts off flow to hydraulic valve, which eliminates re-lief valves from system. Charge pump pressure wi llbuildunt il internal ailure occurs.

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IMPLEMENT L I F T SYSTEMBecause no tractor disassembly i s required i n orderto gain access to test point, it is suggested that imple-ment system pressure be checked early in any trouble-shooting routine as amatterof convenience. A cor-

rect lift system ressure reading indicates a goodcharge pump.A suggested gauge system i s illustrated i n Fig. 15.

GAUGE 0-1000 PSI

WHEEL HORSE7752 PLUG STEELOR BRASSEE '4 N.P.T.(BLACK PIPE)

RUN 1/2-20 TAPINTO EACH END 106420 HOSEOF TEE 1/2-20 SAE-RINGBOSS, EACH END

REPLACEMENT O-RINGSWHEEL HORSE 973310FIG. 15. PressureTest Equipment

FIG. 16. PressureTest Point Lift SystemTo check implement lift systempressure:

1. Connect gauge system to front lift cylinder hose.Gauge can be connected to place hydraulic l if tcylinder either in or out of circuit, as desired.2. With engine running, hold lift control valve in"Down" direction. Normal pressure reading is700 50 PSI. If pressure i s over 800 PSI, re-place hydraulic lift control valve. Do not attemptadjustment of relief valve setting without fac-tory assistance.Severe transmission damagecanoccur if adjusted improperly.

Refer to appropriate Troubleshooting Chart fortroubleshooting procedure.

LIFT CYLINDER IN CIRCUITOR

TO CONTROLVALVE

PLUG

LIFT CYLINDER OUT OF CIRCUIT

IMPLEMENT LIFT SYSTEM PRESSURE

PLUGTO OIL FILTERBASE TEST POINT

CHARGE PRESSUREFIG. 17. HoseConnections

CHARGEPRESSURECharge pressure is checked at oil filter base.

FIG. 18. Charge PressureTest Point


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1. Remove pipeplugand connect gaugedirectlyto filter base. Although hread i s 1/4-18 NPT, i twil l accept a 1/2-20 SAE fi tt ing fo r test purposes.2. Operate engine. Normal chargepressure i s 30-90 PSI. Refer toappropriate TroubleshootingChart for troubleshooting procedures.Always check implement lift pressure reliefvalves for signs of tampering if charge pres-suer i s low. A elief valve set too high willcause permanent internaldamage o charge

pump and hydrostatic transmission. If damagehasoccurred, replace transmission do notoperate lift system until hydrauli c ift controlvalve hasbeen eplaced, or relief valve ad-justed. Do not adjust relief valve without fac-tory assistance.

REPAIR OPERATIONSGENERAL INFORMATION

Hydrostatic transmission, ransaxle, andhydraulicli ft system may al l be erviced withoutemovingcomplete ransmission system from tractor. Detailedrepai r operations are given or n-vehicle service. Aprocedure for emoving ransmission/transaxle romtractor as an assembly is also given at end of thissection.

AnCrow Foot wrench is necessary to erformin-vehicle transmission andransaxle service.Twosources of this wrenchare: Distributors of Williamsproducts (Williams #BC-1003) and SearsRoebuck &Co. (Sears #9HT4362).HYDRAULICHOSESHYDRAULIC LIFT CONTROL VALVEREMOVAL

1. If applicable, remove battery (Fig.19C).2. Removeseat and ear fender.3. Remove control cover plate ndear hood-stand cover plate.4.Remove LH side cover.5 . Support rear of ractor wi th jack stands placedunder rear footrest cross od.6. Remove LH wheel. If replacing charge pumphose, also emove RH wheel.7 . Disconnect hree hoses (Fig. 19A). Remove twocontrol valve bracket bolts shown in Fig. 19Aor 19C.Free long hose from clamp and ie se-curing i t to tractor.

FIG. 19s. Early Model ControlValve

FIG. 19A Disconnect Hoses15-

8. Pull control valve out enough to permit clamp-ing i t to rear edge of battery tray (Fig.19B).Do not secure valve by its handle when loos-ening hose or it may break.9. Disconnectcharge pump output hose,connect-ed to IN port on control valve.

10.Remove control valve rom ractor for epairor replacement of valve/hoses.

11 . If replacing charge pump output hose, free i tfrom clamp inside hoodstand. Disconnect hosefrom charge pump outlet, and pul l hose out ofhoodstand toward rear.

9 1 2

FIG. 19C. Late Model ControlValveINSTALLATION

1. Follow removal instructions in reverse.a. Use care to prevent dirt fromenter ing system,particularly when working charge pump out-let hose through hoodstandb. Clamp valve as shown in Fig. 198 or 19Cwhen tightening charge pump outlet hose.c. Operate hydraulic system beforenstallingcovers. Check performance and for oil leaks.Exercise lift system for one minute to expelany rapped air.d. If control valve was rebu ilt or replaced, per-form an implement l if t system pressurecheck.e. Check that hoses are routedproperlyandsecured with clamps and ties as required,


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\

FIG. 20. Charge Pump Outlet HoseTRANSMISSIONREMOVAL1.Remove eat, rear fender, an d control cover

2. Support rear of tractor with jack stands placed3. Drain transmission oil rom transaxle.4. Remove rear wheels.5. Close fuel shut-off valve. Remove andplug6. Remove two bolts, bracket and l if t tube from7. Remove two bolts securing oil ilte r base to

plate.under rear footrest cross rods.

fuel hose.top of transaxle.seat support.

FIG. 21. FreeSeat Support from Transaxle8. Remove two bolts an d nuts securing front seat9. Remove fuel tank, seat an d fender support assupport bracket to hoodstand.an assembly.

flG. 22. Fuel Tank/Seat SupportRemoved

10. Remove cooling fan. Note direction of installa-11. Disengageransmissionlutch and remove12. Disconnect rear end of motion control rod from

tion.drive belt from nput pulley.cam plate.

FIG. 23. Fan, Drive Belt, Control RodRemoval13. loosen lower fitting and disconnect upper fit-ting of suction ube; rotate tube forward.14. Cut plastic tieholding wires to rontof cam

plate. Pull wiring and uel hose forward, outof hoodstand, and secure out of way. Pivotcontrol rodupand orward, out of way.15.Disconnect out let hoseconnected to bottom ofcharge pump.

FIG. 24. Move Wiring, Disconnect Tube/Hose16. Use an 11/16 Crow Foot wrench to disconnectmetal ine from oil ilter)at ront of trans-mission. Move motion control lever forwa rd foreasier access after loosening fitting.

FIG. 25. Disconnect Metal line-16-


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17. Transmission drains hrough open bearing be-hind the output gear. Transmission wi ll still behalf fill ed with oil when removed. Remove twobolts securing bottom of transmission. Removetwo bolts securing top of transmission. Removetransmission and discard gasket.

FIG. 26. TransmissionRemovalPULLEY,GEAR AND C A M PLATE REMOVAL

1 . The input pulley i s keyed to charge pump nput2. The output gear i s a slip fit and i s retained bya snap ring, which i s installed with sharp edgeout (awayrom gear). A splined washer i sinstalled behind gear.

shaft and is a slip it.

Output haft can be moved inward undermoderate pressure, making it impossible toinstall snap rin g n i ts groove. In his case,slip spacer and gear on shaft. Use cooling fanwasher and bolt, plus one or two 3/4 washers,as a "jack" to pul l shaft back out.

3. Suction line elbow fitting at top of charge pumpcannotbe emoved without transmission dis-assembly and i s supplied with replacementtransmissions.Elbow fittingat ront of trans-mission i s removable.OFTRANSMISSION-CAN NOTBEREMOVED WITHOUTTRANSMISSIONDISASSEMBLY

THISFITTINGPART

THISFITTINGREMOVEABLEI

FIG. 27. Gear, Pulley and Fit ting Removal4. Removeock boltand eccentric from ontro larm. Work cam plate and bracket out from und-er arm as shown in Fig. 28 .

FIG. 28. CamPlate and BracketRemoval5. Fig. 29 showscam platepivotand riction as-sembly sequence.

FIG. 29. Cam Plate Disassembled6. Remove control arm withapuller only.Trans-mission control shaft i s tapered, as well as hav-ink a keyway, for retain ing control arm. Strik-ing end of control shaft to remove control armcan cause permanent internal damage to trans-mission.

FIG. 30. Control Arm Removed


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INSTALLATION1. Transfer linkage, pulleyand ittings o newtransmission,as applicable. Use an anti-rustcompound on input pulley shaft (Texaco RustPreventative, Code 1976, Compound L Light,or equivalent).2. Place a new gasket onransmission, usinggrease to hold it in place.3. Install transmission on transaxle and securein place. Use new Eslok bolts and nuts, orlockwashers.efore completely tighteninghardware, start upper suction line nut ontotransmission fitting. Torque bolts to 30-35 ft.I bs.4. Connect metal line o ront transmission fit tingand tighten w ith 11/16 Crow Foot wrench.5. Tightensuction line fittings.6. Route fuel hose andwir ing harness undertransmission.7. Connect hydraulic hose to bottom of charge

pump.8. Install drive belt, engage transmission lutch

and nstall cooling fan side with manufac-turers name faces out.9. Reattach control rod o control cam.

10. Cable tie wiring harness to control plate.11. Fill transaxle with 1OW-30 or 1OW-40 motoroil.12 . Install fuel ank/seat support assembly.13 . Secure oil fil ter base to seat support.14. Install lift tube, bracket and bolts. Beurefront of lift tube enters hole at front of trans-axle mounting flange. Use lockwashers or new

Eslok bolts. Refer to Fig. 21 and referencephoto below.

FIG. 31. lift lu be Locationi 15. Connect fuel hose and open shut-off valve.16. Set transmission neutral, check for leaks, and

recheck oil level.17. Install rear wheels andower tractor.18. Install rear fender and seat .

TRANSAXLEIN-VEHICLESERVICE

1. Remove, eat, rear fender, and control cover2. Support rear of tractor wi th jack stands placed3. Drain transmission oil rom transaxle.4. Remove rear wheels.5. Close fuel shut-off valve. Remove andplugfuel hose.6. Remove two bolts, bracket and ift tube fromtop of transaxle (Fig. 21).7. Remove two bolts securing oil ilter base toseat support (Fig. 21).8. Remove two bolts and nuts securing front seatsupport bracket to hoodstand.9 . Remove fuel tank, seat and fender support asas assemblyFig. 22).

10. If hydrostatic unit i s to be removed, follow n-structions for transmission removal. To leavetransmission installed while servicing trans-axle:a.Remove cooling fan.b. Remove drive belt from nput pulley.c. Loosen lower itt ingand disconnect uppersuction tube fitting.d. Leave transmission bolt indicated in Fig.32 installed, which will hold transmissionin place during transaxle service.

plate.under rear footrest cross ods.

FIG. 32. TransaxleService,Transmissionnstalled11 . Remove both wheel hubs andxle keys.Thoroughly remove burrs and corrosion fromaxle shafts Failure to do so may cause dam-age to needle bearing in case halves, as wellas damage new axle seals when installed.12 . Disconnect metal line rom rontof transmis-

sion, using an 11/16 Crow Foot wrench (Fig. 25).Move metal ine and oil filter out of way asshown in Fig. 33 .13 , Disconnect brake eturn spring.14. Remove brake drum. Thoroughly remove anyburrs or corrosion from shaft

If brake drum wi ll not come off, removal canbe delayed until case half i s removed. Brakeshaft can then be pressed out of drum. Needlebearing will probably be damaged as shafti s pressed through it; replacement i s recom-mended.


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FIG. 33. Remove Wheel Hubs,Disconnect Metal Line

FIG. 34. Brake Spring and Drum Removal15 . Remove eight bolts securing case halves to-gether.16. Swing brakebandand bracket out of way.Carefully remove left case half. A soft-facedmalletmay be used to break seal. Discard

gasket.

Some early production transaxles requiredtwo gaskets. Use two new gaskets when reas-sembling these units.

FIG. 35. Case Half Removal

FIG. 36. Case Half Removed17. Remove two intermediate gears anddifferen-tial assembly from ight case half.CASE HALF SERVICE1. Remove and discard brake shaft s ea l and bothaxle seals.Do not install new seals unti l trans-axle i s reassembled.2. Carefully inspect bearings in both case halves.

If replacement is required, two axle shaftneedle bearings can be driven out from eitherinside or outside of case. All other bearingsshould be driven out from outside of case half.To remove uppermost bearing in RHcase,usea punch inserted through small openingbehind bearing.3. Axle needle bearings shoulderessed infrom outside. All other bearings are pressed infrom inside case. All bearings are pressed flushwith machined surface around bearing bore.

FIG. 37. Right Case Half nterior

FIG. 38. left Case Halfnterior19-


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INTERMEDIATEGEAR AND DIFFERENTIALSERVICENOTE: When ordering repa ir parts, carefully den-tifypa rt numbers from parts manual hat matchesyour tractor VIN number. Inside diameter of d ifferen-tial end cap bearing was changed from 1/2 inchdiameter to 40MM diameter.1. First intermediate gear assembly order i s shownin Fig.39.Parts areaslip-to-light press fit.Second intermediate gear and pinion are very

tight fits and normally require a arge press toseparate them.

FIG. 39. Intermediate Gear Assembly2. Differential assembly hould be disassembledfor inspection during a general overhaul. Checkfor loose hardware, cracks, enlarged holes,and gear wear or damage. Note that adjacentdifferential pinions are installed in oppositedirections (teeth up, teeth down, teeth up, etc.)

FIG. 40. Differential Disassembled3. Use new nuts when reassembling, which arespecial high-tensile parts. Use new Grade 8bolts,also, if necessary. Note location of hard-ened washers and direction of bolt nstallation(Fig.41).Torque bolts to 30-35 ft. Ibs.

FIG. 41. Differential AssemblyTRANSAXLE REASSEMBLY

Follow disassembly instructions in reverse order toreassemble transaxle. Following assembly notesapply:1.Use grease tohold case gasket in place when2. Use lockwashers or new Eslok nuts and bolts.

reassembling.Case bolt torque is 30-35 ft. Ibs.

3. After assembling casehalves, insta ll new oi lseals. Use tape over axle keyways to preventdamage to seal; use a seal bul let (sleeve) wheninstalling oil sealon brake shaft. Use a sealdriver or other suitable tool to drive seals. Sealsshould be flush to slightly below flush with out-side of case.

4. Use an anti-rust compound on axle shafts (Texa-co Rust Preventative, Code 1976, Compound LLight or equivalent). Apply a very ligh t coat ofthis compound on brake drum shaft also.5. Wheel hub set screw torque is 28-32 ft. Ibs.6. Brake adjustment should be checked after e-assembly.

facesout.7. Cooling fan side with manufacturers name

TRANSMISSION SYSTEMREMOVAL

In somecases, removal of transmission/transaxleas an assembly may simplify repairs.1. Perform Steps 1-12 under Transmission Remov-

a .2. Cut plastic tie securing wiring harness to cam

plate (Fig.24).3.emove brakeedaleturn spring. Removebrake adjustment nut, washer and spring (Fig.10 or 11).4.Disconnect hydraulic hose fromoil ilte r base.5. If desired, install rear wheels and tires to permitrolling assembly away rom tractor.6. Support weightof transaxle and remove fourbolts securing frontof transaxle to frame.

- 0 -


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INSTALLATIONreinstall assembly. Following notes apply:Follow disassembly nstructions in reverse order to

1. On early modelsonly, be sure toguidebrakerod through brake band as assembly i s movedup o tractor (Fig. 10).2. It i s help ful to insert a couple of 3/8-16 x 2 boltsthrough a pa ir of holes in frame plate, thentemporarily thread them into transaxle. Theywi ll serve as pilots for hole alignment and per-mi t easy installation of f i r s t two normal-lengthbolts. Use new lockwashers on bolts. Torque to

3. Cooling fan side with manufacturer's name4. Adjust brake and make neutral adjustment after

30-35 ft. Ibs.faces out.reinstallation.

INTERNAL TRANSMISSIONSERVICEThe fo llowing repa ir procedures for he Model 11EatonTransmission i s for OUT-OF-WARRANTY trans-missions ONLY. Transmissions within warranty periodmust be serviced wi th new or rebu ilt complete units.

Repair parts are ava ilab le using regular Wheel Horseprocedures.Repair pa rt numbers are listed in thismanualand on Blue Color Microfiche Card for theModel 11TransmissionRepair Manual.(1 ) 2" x 6" Wood Block with 3/4 .Hole(1 ) 2" x 2" x 2 1/2 Wood Block(2 ) Large 1/2 Wide RubberBands(1 ) Hardened 3/16 Dia. x 10" LongRod(1 ) Tube of VaselineIMPORTANT: Whencompressed air i s used in clean-ing, do not expose lip seals orbearing surfaces tohigh pressure.

Clean ransmission exterior thoroug'hly before re-pairs are started. Use a cleaning solution that will notaffect paint, gaskets, rubber seals an d plastic.Drain fluid rom transmission out through shaft

bearing.Mark an using felt marker to dentify "Outside"position.Remove snap ring, gear, fan and pulley from trans-mission.Place transmission on 2" x 6" with splined shaft up.

SUGGESTED ITEM AIDS

BODY REMOVAL

Motor

FIG. 42 .

IMPORTANT: Motor ball piston assembly must emainintact as b al l pistons are matched to motor rotor. Userubber band o etainball pistons in place duringhandling.Use a 1/4 Allen wrench to remove two socket headbolts.Separate body from cover.If coverdoes not separateeasily, tap body withPlace rubber band on motor rotor.

plastic hammer to break seal.

BODYDISASSEMBLYRetainingRing

FIG.43.Remove bearing etaining ingand press utputshaft inward. Press bearing out from body.

BODY NSPECTION

Line :-

IFIG. 44

Inspectcontact line of motor ba ll pistons on racelocated in body. Contact area must be smoothancompletely free of any irregularities.If race i s damaged, carefully inspect ball piston!

MOTOR ROTOR REMOVAL/INSPECTIONMotorRotorAssy.

CoverAssy.

RotorBoreBallpiston

FIG. 45- 2 1


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Hold pintle assembly in position against cover andremove motor rotor assembly.IMPORTANT: Each ball must be replaced in same borefrom which it was removed. Use egg carton for ba ll

Inspect rotor assembly.Remove piston balls romrotor,one at a time, working clockwise from letterstamped in face of rotor and place in egg carton.inspect ba ll pistons. They must be smooth and freefrom any marks.Inspect rotor bores, bushing and pintle for damageor excessive clearance. Ball piston to rotor bore clear-ance i s select fi t to .0002-.0006". When damage i sfound, replace complete rotor assembly. If damage i snot found, reinstall balls in their removed bores andretain with rubber band.

storage and identification.

PINTLE REMOVAL

FIG. 46IMPORTANT: Pump rotor piston balls must remain inpump rotor, a repeat of previous Motor rotorassembly.Usesecond rubber band o retain piston balls.

Make sure pump rotor remains in cover and tap oncover with plastic hammer to remove pintle assembly.Place rubber band on motor rotor assembly.

RELIEF VALVE REMOVAL/INSPECTIONRelief Valve Plug DO NOT REMOVEPlugs (2)

Ball

Pintle

FIG. 47WE DONOT RECOMMENDCOMPLETEDISASSEMBLYOF PINTLE ASSEMBLYORLEANING,LUSHINGQUIRED,USEFOLLOWING PINTLE DISASSEMBLY AND

Do not remove two large plugs located on pintlejournal.

Use a 1/4Allen wrench to remove relief valve plug.Remove spring and ball. Inspect ba ll seat and all partsfor damage. Replace any damaged parts.

SHOULD BEALL HAT IS NEEDED. IF REPAIR I S RE-INSTALLATIONROCEDURES.

Install ball, spring andplugnto pintle. SCREWPLUG EN D IN JUSTBELOWSURFACE OF PINTLE, DONOTTIGHTENCOMPLETELY.

DAMPENING PISTONSREMOVAL/INSTALLATION

FIG. 48IMPORTANT: When removing dampening piston, donot hit pintle journals or damage to pintle will occur.

To remove dampening pistons, use adhesive to ce-ment a bolt or similar object to pistons and pul l themfrom pint le bores. Remove back-up rings and O-ringsfrom pistons.Replacepistons if damaged.

Install new back-up rings nearest to smooth pistonface and O-rings i n groove on pistons.Lubricate outer surface of pistons and press pistonsinto pintle bores wi th smooth face up. Piston smoothface should be flush with pint le surface.

CHECK a ACCELERATION VA L VES

FIG. 49Press coil pin and solid pin from pintle housing.

CHECK VALVE BALLS REMOVAL

Rod3/16Dia. Check Valve Body Check ValveBall

FIG. 50-2 2


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Insert 3/16 rod through check valve body to contactball. Tap rod to push bal l through retaining ring andinto center portof pintle. Repeat fo r secondcheckvalve ball. Shake pintle o remove balls from centerport of pintle.

ACCELERATION VALVES REMOVAL

3/16 Dia.Rod AccelerationValves

FIG. 51IMPORTANT: Some models use different springs forforward and reverse. Be sure todentify springsused with acceleration valves so they can be replacedin same bore from which they were removed.

Insert rod through check valve body against accel-eration valve body and drive both valve bodies andballs out pintle bore. Repeat method for second valvebody a nd ball. Remove springs.

CHECK VALVE BODIES REMOVALCheckValve in Check ValveReplace Ball

FIG. 52Reinstall check valveballs through center portofpintle. Place rod through acceleration valveoreagainst check valve ball and drive check valve andball out pintle bore. Remove check valve etainingring. Repeat for' second check va lve and re tainingring.Clean al l parts thoroughly. Inspect al l parts fordamage. Replace all defective parts. You must re-place check valve etaining rings.

CHECK a ACCELERATION VA L VES

Check Solidincceleration Valvesalves

FIG. 53Install acceleration valve springs in their respectivepint le bores. Install acceleration valves into pintlebores with smaller diameter of valves inward. Besure that both valves slide freely in bores. Press woballs against acceleration valve bodies until balls clearsolid pin hole in pintle. Install solid pin n pintle. In-sert rod through check valve ports ofpintleanmove acceleration valve bodies and balls again:

solid pin.Install ball nto check valveand fill valve cavitywit h vaseline. Place retaining ring on end of valve sthat vaseline holds it. Press check valve assembly intopintle bore, retaining rin g first, until valve body clearcoil pin hole and bottoms out in bore.Repeat forsecond check valve, bal l and etaining ring. Check thatretaining rings holdballs in check valve bodies. Ir-stall coil pins in pintle.

PUMP ROTOR REMOVAL/INSPECTION

Rotor

FIG. 54.Removeseal from cover.

IMPORTANT: Use a wide rubber band o etain ballpistons in place during handling. Pump bal l pistonassembly must remain in tact as b al l pistons are match-ed to pump rotor.Lift pump otor assembly from coverassembly.Inspect rotor assembly.Remove piston balls fromrotor,one at a time, work ing clockwise from letterstamped in face of rotor and place in egg carton forstorage and identificaiton.Inspect ba ll pistons. They must be smooth and freefromany marks.

RotorBore

PistonBal

-23-


29/45

CAM RING REMOVAL-Control ShallInsert

camRing

Buttons

ControlShall

FIG. 55Inspect rotor bores, bushing and pintle for damageor excessive clearance. Ball piston to rotor bore clear-ance is select f i t to .0002-.0006".When damage i sfound, replace complete rotor assembly. If damageis not found, reinstall balls in their removed bores andretain with rubber band.Slide cam ring rom pivot pin and control shaft incover. Then lif t ring from cover. Remove control shaft

insert from cam ring.Remove two buttons from cover.

CAM RING INSPECTIONCam

PumpRaceI IFIG. 56

Inspect area where ball pistonscontact race. Thisarea must be smooth and completely free of damage.

CHARGE PUMP HOUSING REMOVALPump

Remove bear ing etaining ring. Remove shaft re-Use 1/4 Allen wrench to remove five bolts.taining ring.

IMPORTANT: Do not pound on bearingpullerwhileremoving charge pump body. Apply steady pull only.Do not damage bore or input shaft during removal.Use two jaw bearing puller, inserted in two notchesmachined in housing, to remove charge pump hous-Ing.

CHARGEPUMPHOUSINGDlSASSEMBLY/INSPECTION

InputBearing

Squarecut Seal

FIG. 59

FIG. 57IMPORTANT: Support bottom of input shaft with 2 x 2x 21/2 wood block wi th cover assembly placed on fla tsurface with input shaft up.

- 2 4 -

Remove square seal from housing assembly. Use abearingpuller o remove bearingand seal. Discardoil seal.

Inspect ball bearing. If damage i s found, obtainnew bearing.CHARGE PUMP CARRIER a PLA TE REMOVAL/INSPECTIONSnapCarrier

Shall

FIG. 60


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Remove six carrier rolls. Remove input shaft snapring.Remove carrier and carrier drivepin rom nputshaft. Remove pump plate. Remove square seal fromcover and discard.Inspect carrier, rolls, inner racecontactareas incharge pump housing and pump plate. If any damagei s found, obtain complete new charge pump assembly.

COVERDISASSEMBLY/INSPECTION

CoverAssy.

FIG. 61IMPORTANT: Be careful not todamage nput shaftbushing in cover.

Remove input shaft from cover.Inspect input shaft for stripped keywayor otherdamage. If damage i s found, obtain new input shaft.

COVER DlSASSEMBLYl/INSPECTION

FIG. 62IMPORTANT: Do not scratch control shaft or distortseal counter bore when removing seal.Do not usehammer on shaft when removing arm.

Remove nut and washer from control shaft. Use apuller to remove arm rom shaft. Remove key fromshaft. Use a sharp narrow edged tool o pierce topmetal part of oi l seal and remove seal from cover andshaft,Discard seal.

Inspect input shaft bushing, if damage i s found ob-tain new cover.If cover is broken, cracked or if side clearance be-tween control shaft and coverexceeds .006, obtainnew cover.

CONTROL SHAFT REMOVAL

STEP 1 STEP 2

Replace control shaft dowel if loose or broken. Toremove haft,measuredistance between center ofdoweland end of shaft. Turncoverover. Usemea-sured distance to locate dowel pin n cover ace. Drilldiameter hole at center point of dowel pin. Drillhole exactly in line wi th center of shaft. Press damag-ed pin rom control shaft. Remove control shaft anwasher. Tap hole dril led n cover with 1/8 pipe alInstall 1/8 pipe plug flush with cover.

Obtain new control shaft and washer if damagefound.

CONTROL SHAFT NSTALLATION

FIG. 64Install contro l shaft and washer in cover. Press newdowel p in through shaft leaving 11/4 ofdowel e:tending from shaft.

COVERASSEMBLY

FIG. 65- 2 5 -


31/45

IMPORTANT: Be careful not to damage nner portionof oil seal.Excessive pressing or driving of seal wi lldamage rubber portion of seal.

Lubricate 1.D. of new oil seal with clean lubricant.install seal in bore.Reinstall key,arm, washer andnut on control shaft. Install input shaft in cover.

CHARGE PUMP PLATE NSTALLATION

FIG. 66IMPORTANT: Support bottom or input shaft with 2 x2 x 21/2 wood block with coverassembly placed onflat surface with input shaft up.

Lightly lubricate new square seal and install seal ingroove of cover. Install pumpplate oncover.Eitherside of pump plate may face cover regardless of inpu trotation. Make sure al l holes line up.

CHARGE PUMP CARRIER NSTALLATION

FIG. 67Apply vaseline to drive pin and install in keywayof nput shaft.

IMPORTANT: For correct carrier rotation, leading edgeof carrier must rotate in same direction as input shaft.Install carrier over input shaft. Be sure keyway in

carrier fits over carrier drive pin on input shaft. Applyvaseline to six carrier rolls and place in cavities ofcarrier.

CHARGE PUMP HOUSING ASSEMBLY

FIG. 68IMPORTANT: Excessive pressing or force on oil sealmay cause damage to rubber sealing portion or maydistort counterbore of housing.

Lubricate inner surface of new oil seal and nstallin charge pump housing with rubber lip toward bore.IMPORTANT: inlet elbow fitti ng must be installed oncharge pump before mounting.

Lubricate new square seal and install in seal grooveof pump housing.

CHARGE PUMP HOUSING NSTALLATION

Screw (4)5/16 x 1%

5/16x 1%Screw (1 )

ChargePumpHousing

IFIG. 69

IMPORTANT: Install 13/4 screw in thicker section ofcharge pump body. if installed and tightened in anyof other four holes, internal damage could occur.

Align charge pump dowel pins with holes in cover.Protect oi l seal lip rom keyways,snap ring groovesand shaft splines.Then guide pump over shaft, car-rier and rolls unti l pins engage holes in cover.Install 5 screws in pump housing and torque to 15

ft . Ibs.


32/45

CHARGE PUMP BEARING NSTALLATION

Upper Snap Ring

FIG. 70Install snap ring n lower groove of nput shaft.Make sure input shaft i s supported and pressbearing on shaft until it contacts lower snap ring.Install upper snap ring on shaft.

CHARGE PUMP RETAINING RING INSTALLATION

RetainingRing

FIG. 711MPORTANT: Input shaft should rotate freely by hand.If not, echeck charge pump installation.

Reinstall bearing etaining rin g n charge pumphousing.CAM RING NSTALLATION

Control

FIG. 72Install 2 buttons in cover.Install cam ring insert with hole away rom camAlign cam ring with control shaft pin and cam ring

ring.pivotpin.

Install cam ringwith flush side ofbearing racefacing cover. Press in irmly unt il cam ring has bot-tomed in coverassembly.IMPORTANT: Cam ring must move freely from stop tostop. If binding occurs at either stop rotate cam ringinsert 180 degrees. Check cam ring movement again.

PUMP ROTOR NSTALLATION

FIG. 73IMPORTANT: Make sure piston balls stay in rotor as-sembly during otor installation. Leave rubber bandon rotor until installed in cover. Pump rotor i s smallerdiameter than motor rotor.

Align slot in pump rotor with nput shaft cross pin.Install rotor assembly on shaft. Remove rubber bandfrom rotor.PINTLE a MOTOR R OTOR INSTALLATION

MotorRotor

RubberBand

Assy

FIG. 74IMPORTANT: Do not force pintle over rotor assembly.It i s a slip fit and pintle must turn reely by handduring installation. If it doesnot, recheck pintle in-stallation.

Position pintle with dampening pistons downandaligndowelpin hole in pintle assembly wi th camring pivot pin and nstall over pump rotor assembly.Lightly grease a new squareseal and nstall s e a lin groove in housing.Leave rubber band on motor rotor assembly andinstall rotor on pin tle with notches up.


33/45

BODYASSEMBLYRetalnlngRingFlow IThroughBearing

output Shaft

FIG. 75Install output bearing. Position bearing on bodyand press on outer bearing race to bottom positionin body.Install bearing retaining ring.Install output shaft. This i s a press fit. Be sureto support inner race of ball bearing while pressingshaft into bearing.

IMPORTANT: Be sure output shaft rotates freelybyhand. If not, echeck body assembly.

BODY NSTALLATION5/16 x 11/4 (2)screw

FIG. 76IMPORTANT: When removing rubber hand make surepiston balls stay in rotor assembly.

Align output shaft with bearingand shaft crosspin in rotor. Carefully remove rubber band from rotorandnstall coverassemblyonransmission. Securecover with two socket head screws and torque to 15foot pounds.

Fill transmission with 1OW-30 oil hroughbearingand rotate inputand output shafts. Drainapproxi-mately 1 / 2 pint of oil rom transmission.Reinstall gear, snap ring, pulley and fan on trans-Transmission i s now ready to be installed in tractor.

mission.


34/45

TRANSAXLE

- 2 9


35/45

TRANSAXLE

Item

1234567891011121314151617181920212223242 5262728293031323334353637383940

Description

t TransaxleCompleteCase-Transaxle RHCase-Transaxle LHBallearingNeedleearingNeedleearingNeedleearingNeedleearingSeal AxleSealDowel PinDifferential End CapDifferential Ring Gear 43 ToothDifferential Pinion Gear 11 ToothSpecial Washer-Case HardenedBolt 3/8-16 X 31/2 Grade 8Nut 3/8-16 High-TensileRear AxleRH-Long (13 1/8 in.)Rear AxleLH-Short (10 1/8 in.)Differential Axle Gear 24 ToothSpecialSnapingGear AssemblyGear-Pinion 11 ToothGear-Reduction 44 ToothThrust WasherShaftGear 44 ToothGear 22 ToothWoodruff Key 3/16 X 11/8Thrust WasherGasket-CaseBracket-BrakeBolt 3/8-16 X 21/2 EslokBolt 3/8-16 X 1 1/4 EslokBolt 3/8-16 X 5Bolt 3/8-16 X 3Nut 3/8-16 EslokFiller TubeDipstickAllen HDPipePlug 1/4

1112221121222844411221111111111111123111

-30 .


36/45


31


37/45


Item

1234567891011121314151617181920212223242526272829303132333435363738

Description

Pump & MotorGear 22 ToothSpacer-Drive GearGasketBolt 3/8-16 X 5Bolt 3/8-16 X 21/2 EslokBolt 3/8-16 X 6 1/2Nu t 3/8-16 Eslok

Snap ing

ControlPlateCamFollower ArmWoodruff Key 1/8 X 5/8Washer 1/2 SAENu t 1/2 EslokSpacer (Long)Spacer (Short)Washer-SpringDiscWasher-FrictionSpacerNu t 3/8-16 ConelockEccentricCamTube-SuctionFittingTubeAssemblyElbowBase-OilFilterLockwasher 5/16Plug 1/4 NPTOilFilterFittingWoodruffKey 3/16 X 3/4Transmission Drive PulleyWasher

Cam-Speed Control

Bolt 5/16-18 X 1 Eslok

Bolt 5/16-18 X 3/4

Eslok Bolt 1/4-20 X 5/8Fan

11111211311111112211211111212211111111

.2.


38/45

MOTION CONTROL,CLUTCHLINKAGE

9

33


39/45

MOTION CONTROL,CLUTCHLINKAGE

Item Description

SpecialBolt 3/8-16 X 1 1/2 1Knob 1Knob 1Handle 1Bushing 1

Screw #10-24 X 1 1/4 1Washer 1/2 SAE 1Bolt 1 /4-20 x 1 1/2 2Washer 1/4 SAE 2Nu t 1/4-28 1


40/45

BRAKE AND LINKAGESINGLE ACTION BRAKE BAND

-35-


41/45

Item

123456789101 1121314151617181920

BRAKE AND LINKAGESINGLE ACTION BRAKE BAND

Description

Brake/Return To NeutralPedalBushingCollarSetScrew 1/4-20 X 1/4 Cup PtSpacerSpring-BrakeReturnBrakeRod-FrontCotterPin 1/8 X 1Washer 3/8 SAESpringHairpinCotterBrakeDrumSpecialWasherBrakeRod-RearBrakeBand

E.S. Nut 3 /8 -16 . .

Bolt 3/8-16 X 1Bolt 1/4-20 X 1/2Nut 1/4-20CotterPin 1/8 X 3/4

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42/45

BRAKE AND LINKAGEDUAL ACTION BRAKE BAND

24

-37-


43/45

ITEM

678910111213141516171819202122232425

BRAKE AND LINKAGEDUAL ACTION BRAKE BAND


44/45

EATON MODEL 11 TRANSMISSION

i

ITEM #123456789

101 11213.1415161718

PART #1 126351 126361 126041 126371126541126381126391126401 12641112595112642112643112644112645113136113041


45/45

ITEM # PART #19202122232425262728293031323334353637383940414243444546474849505152535455

112608112646112611112610112647112648112649112650112651112652112653112654112616112656112657112658112659

112660112661112661112662112663112664112665113137112613112614112669

112666112600112616112667

DESCRIPTION QTY.Back Up Ring (Part of Item 55) ___ ______________O-Ring (Part of Item 55) ___________________________Coil Pin (Part of Item 22) ____________________________Subassembly - Pintle __ ______________________________Retaining Ring (Part of Item 22) _______________ 2Ball (Part of Item 22) _______________________________2Body - Check Valve (Included in Item 22) __ 2Ball (Included in Item 22) ___ ___________________ 1Spring - Relief Valve (Included in Item 22) 1Plug - Relief Valve (Included in Item 22) ____ 1Pin (Included in Item 22) ___________________._______Shield ______.________________________________________________ 1Retaining Ring __ ___...__________________________________ 1Snap Ring __ ____._______________________________ ________ 2Capscrew _________________________________..________________Roller __ _____.___._____________________________----------------Carrier ._._..____. ___________________________________________Seal (Included in Item 9 and 55) _______________ 1Control Shaft Kit __________.___________________________ 1Washer (Part of Item 9 and 37) ________________Dowell (Part of Item 9 and 37) _________________1Insert - Cam Ring _____________________________________Spring - Act. Va lve (Included in Item 22) __ 1Spring - Act. Valve (Included in Item 22) __ 1Body - Act. Valve (Included in Item 22) __ 2Ball (Included in Item 22) __________________________Subassembly - Motor Rotor ______________________Subassembly - Output Shaft ____________________Motor Race (Included in Item 50) ___ _________. 1Subassembly O-Ring Plug ___________________________ 1Tube Fitting O-Ring (Included in Item 48) ____ 1Subassembly Body ___________________________________ 1Seal (Part of Item 50 and 55) ___._._____________ 1Output Bearing -._________---.--_------------.------.-~-- 1Retaining Ring (Part of Item 50) _______________.Capscrew (Part of Item 50) __.__ _________________2Overhaul Seal Kit (Includes Items 3, 6, 8,

14, 19, 20, 36, 49 and 51) __________________ 1

Documents

Eaton Complete Transaxle Repair Guide - Ea11wh