of 10 /10
ALLIS-CHALMERS SHOP MANUAL MODELS 6060-6070-6080 The model and serial numbers of tractor are linked together to form the Product Identification Number (PIN). The PIN number is iocated on iower left-hand side of steering console on late production tractors. On eariier models, the PiN is stamped into right-hand side of flywheel housing. The engine modei and serial numbers are stamped on a plate located on upper left-hand side of cylinder block. INDEX (By Starting Paragraph) 6060 6070 6080 BRAKES Adjust 107 107 107 Bleed 108 108 108 Disc Brake Assemblies 110 110 110 Master Cylinders 109 109 Parking Brake Ill 111 CLUTCH. 85 85 COOLING SYSTEM Radiator Thermostat Water Pump 59 60 61 DIESEL FUEL SYSTEM Filter?, and Bleeding . 62 Injection Nozzles 65 Injection Pump 63 DIFFERENTIAL Adjustment 100 Differential Lock 104 Overhaul 99 R&R Main Housing 98 ELECTRICAL Alternator and Regulator Starting Motor ENGINE Assembly R&R Camshaft Connecting Rods and Bearings . . . Crankshaft and Bearings Cylinder Head Cylinder Sleeves Flywheel Injection Nozzle Sleeves Oil Cooler Oil Pump Pistons, Piston Pins and Rings . .. Rocker Arms Timing Grear Cover Timing Grears Valve Clearance Adjustment .... Valves and Seats 76 79 29 43 49 50 30 48 53 36 58 56 47 35 37 38 31 32 59 60 61 62 65 63 76 79 29 43 49 50 30 48 53 36 58 56 47 35 37 38 31 32 109 111 85 59 60 61 62 65 63 100 100 104 104 99 99 98 98 76 79 29 43 49 50 30 48 53 36 58 56 47 35 37 38 31 32 FINAL DRIVE Overhaul 106 106 106 Remove and Reinstall 105 105 105 6060 6070 6080 FRONT AXLE (Two-Wheel Drive) Axle Main Member Spindles and Bushings Tie Rod and Toe in Wheel Bearings FRONT-WHEEL DRIVE AXLE Axle Shaft, Steering Knuckle and King Pins Differential and Bevel Gears Final Drive Lubrication R&R Axle Tie Rod and Toe-in Transfer Gearbox 4 2 3 1 9 10 8 5 7 6 15 HYDRAULIC LIFT SYSTEM Adjustments 124 External Lift Cylinder Hitch Control Valve 139 Lift Housing and Cylinder 140 Lift Link 146 Pump 131 Relief Valve 137 Remote Valves 138 Reservoir and Filters 115 Sensing Bar 145 Testing 117 Troubleshooting 116 POWER STEERING Control Valve 22 Cylinder 23 4 2 3 1 9 10 8 5 7 6 15 124 Lubrication and Bleeding Pump Relief Valve . .. Testing Troubleshooting 17 21 20 19 18 139 140 146 134 137 138 115 145 117 116 22 23 17 21 20 19 18 4 2 3 1 9 10 8 5 7 6 15 124 142 139 140 146 131 137 138 115 145 117 116 22 23 17 21 20 19 18 POWER TAKE-OFF 112 112 112 PROTECTIVE FRAME AND CAB R&R Cab 148 R&R Protective Frame 147 148 147 148 147 TRANSMISSION .. TURBOCHARGER. 90 90 90 72 72 72 2 ©1988 Intertec Publishing Printed in U.S.A.

Allis Chalmers Models 6070 Tractor Service Repair Manual

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Page 1: Allis Chalmers Models 6070 Tractor Service Repair Manual



The model and serial numbers of tractor are linked together to form the Product Identification Number (PIN).The PIN number is iocated on iower left-hand side of steering console on late production tractors. On eariiermodels, the PiN is stamped into right-hand side of flywheel housing.

The engine modei and serial numbers are stamped on a plate located on upper left-hand side of cylinder block.

INDEX (By Starting Paragraph)6060 6070 6080

BRAKESAdjust 107 107 107Bleed 108 108 108Disc Brake Assemblies 110 110 110Master Cylinders 109 109Parking Brake I l l 111

CLUTCH. 85 85

COOLING SYSTEMRadiatorThermostatWater Pump


DIESEL FUEL SYSTEMFilter?, and Bleeding . 62Injection Nozzles 65Injection Pump 63

DIFFERENTIALAdjustment 100Differential Lock 104Overhaul 99R&R Main Housing 98

ELECTRICALAlternator and RegulatorStarting Motor

ENGINEAssembly R&RCamshaftConnecting Rods and Bearings . . .Crankshaft and BearingsCylinder HeadCylinder SleevesFlywheelInjection Nozzle SleevesOil CoolerOil PumpPistons, Piston Pins and Rings . . .Rocker ArmsTiming Grear CoverTiming GrearsValve Clearance Adjustment . . . .Valves and Seats











100 100104 10499 9998 98



FINAL DRIVEOverhaul 106 106 106Remove and Reinstall 105 105 105

6060 6070 6080

FRONT AXLE (Two-Wheel Drive)Axle Main MemberSpindles and BushingsTie Rod and Toe inWheel Bearings

FRONT-WHEEL DRIVE AXLEAxle Shaft, Steering Knuckle

and King PinsDifferential and Bevel GearsFinal DriveLubricationR&R AxleTie Rod and Toe-inTransfer Gearbox




HYDRAULIC LIFT SYSTEMAdjustments 124External Lift CylinderHitch Control Valve 139Lift Housing and Cylinder 140Lift Link 146Pump 131Relief Valve 137Remote Valves 138Reservoir and Filters 115Sensing Bar 145Testing 117Troubleshooting 116

POWER STEERINGControl Valve 22Cylinder 23





Lubrication and BleedingPumpRelief Valve . . .TestingTroubleshooting








POWER TAKE-OFF 112 112 112


R&R Cab 148R&R Protective Frame 147





90 90 90

72 72 72

2 ©1988 Intertec Publishing Printed in U.S.A.

Page 2: Allis Chalmers Models 6070 Tractor Service Repair Manual


GENERALEngine MakeEngine ModelNumber of CylindersBore



Number of Forward SpeedsBattery

TUNE-UPFiring OrderValve Clearance (Hot)—

Intake and Exhaust

Injection Timing (Static)Timing Mark LocationEngine Low Idle—RpmEngine High Idle—RpmEngine Full Load—RpmPower Rating


Cooling System

Crankcase (With Filter)

Differential Housing (With Filter Change)

TransmissionFront Drive Axle-

Final Drive (Each)


Fuel Tank

*Add 2 quarts (1,9 L) if equipped with front-wheel drive.

SIZES AND CLEARANCESCrankshaft Main Journal


Crankpin JournalDiameter

Camshaft Journal Diameter

Cylinder Sleeve ID

Piston Skirt OD

Main Bearing DiametralClearance

Rod Bearing DiametralClearance

Crankshaft End Play





- 4 -



- 3.875 in. -(98.42 mm)

- 4.250 in. -(107,95 mm)

- 200 cu. in. -(3.3 L)

1212 Volt, Negative Ground

63 hp(47.0 kW)

37 qts.*(35 liters)

12 qts.(11.4 liters)

1.5 qts.(1.4 liters)

5.5 qts.(5.2 liters)


0.015 in.(0.38 mm)18° BTDC

Crankshaft Pulley775-825

2480-2580230070 hp

(52.2 kW)

— 17 qts. —(16.1 liters)

— 10 qts. —(9.5 liters)

37 qts.*(35 liters)

12 qts.(11.4 liters)

1.5 qts.(1.4 liters)

5.5 qts.5.2 liters)

— 32 gal. —(121 liters)

2.7465-2.7480 in.(69.76-69.80 mm)

2.3720-2.3735 in.(60.25-60.29 mm)

- 2.130-2.131 i^. -(54.18-54.23 in.)

3.8755-3.8770 in.(98.44-98.48 mm)3.8698-3.8718 in.(98.29-98.34 mm)

0.0016-0.0048 in.(0.04-0.12 mm)

0.001-0.004 in.(0.02-0.10 mm)0.003-0.013 in.(0.8-0.33 mm)

83 hp(61.9 kW)

39 qts.*(37 liters)12.7 qts.

(12.0 liters)

1.9 qts.(1.8 liters)

5.9 qts.(5.5 liters)

Page 3: Allis Chalmers Models 6070 Tractor Service Repair Manual



Camshaft Bearing DiametralClearance

Camshaft End Play

Piston Skirt Diametral •Clearance


Connecting Rod Cap

Main Bearing Cap . . .

Cylinder Head

Injection Nozzle

Crankshaft Pulley



- 0.002-0.005 in. -(0.05-0.13 mm)

- 0.001-0.011 in. -(0.03-0.28 mm)

0.0037-0.0072 in,(0.09-0.18 mm)


45 ft.-lhs.(61 N • m)135 ft.-lbs.(183 N • m)165 ft.-lbs.(224 N • m)15 ft.-lbs.(20 N • m)

• 182 ft.-lbs.(247 N • m)

- 135 ft.-lbs.(183 N • m)

DUAL DIMENSIONSThis service manual provides specifications in both the U.S. Customary and Metric (SI) systems of measurement. The first J

specification is given in the measuring system perceived by us to be the preferred system when servicing a particular compo- 1nent, while the second specification (given in parenthesis) is the converted measurement. For instance, a specification of "0.11 ^inch (0.28 mm)" would indicate that we feel the preferred measurement, in this instance, is the US. system of measurementand the metric equivalent of 0.011 inch is 0.28 mm.


Fig. 1—Exploded view of ad-justabie front axle used onModel 6080. Other models are

simiiar.1. Pivot pin2. Axle main member3. Thrust washers4. Cylinder anchor bushing5. Retaining ring6. Steering arm7. Bushings8. Axle extension9. Thrust washers

10. Spindle11. Wheel hub12. Seal13. Wear sleeve14. Bearing15. Bearing16. Bearing17. Bearing18. Washer19. Nut20. Retainer (6080)21. Huh cap


All Models

1. Ib disassemble, raise and supportfront of tractor. Remove hub cap (21—Fig.1), cotter pin and bearing retaining (19),then separate wheel hub (11) and bear-ings from spindle (10). Drive bearing cupsand seal wear sleeve (13) out of wheel hubif renewal is necessary. Drive seal (12)from spindle.

Install inner and outer bearing cups inwheel hub. Press new wear sleeve (13) in-to hub until edge of sleeve is V^ inch (6.35mm) past flush (S—Fig. 2) with edge ofhub on all 6080 models and 6060 and6070 models with 96 inch (245 cm) tread,or flush with edge of hub on 6060 and6070 models equipped with standard ax-le. Be sure to use correct size driver to in-stall wear sleeve to prevent damage tosleeve. Install seal assembly (12—Fig. 2)

Page 4: Allis Chalmers Models 6070 Tractor Service Repair Manual

MODELS 6060-6070-6080 Paragraphs 2-6

onto spindle (10) so side with name andnumber faces outward. Make certain sealbottoms against spindle shoulder.

Pack bearings with wheel bearinggrease, then reinstall wheel hub. Tightenadjusting nut (19-Fig. 1) to 85 ft.-lb& (115N ' m) torque while rotating hub to seatbearings. Then, loosen nut to align holein spindle with notch in nut or nut re-tainer (20) and install cotter pin. Installhub cap.


All Models

2. Tb remove front spindle (10—Fig. 1),first raise and support front of tractor.Remove front wheel. Remove retainingring (5), then pull steering arm (6) fromspindle. Note that arm is an extremeshrink fit on spindle and removal willprobably require using a hydraulic pressor cutting arm off with a torch. Withdrawspindle from axle extension (8) andremove thrust washers (9).

Inspect spindle bushings (7) for wearand renew if necessary. Press newbushings into axle extension bore untilthey are flush to 0.030 inch (0.75 mm)below surface of axle extension.

Install new thrust washers on spindle,then position spindle in axle extension.Heat steering arm to 600 °F (315 °C), thenpress onto spindle until spindle end playis less than 0.030 inch (0.75 mm) and re-taining ring (5) can be installed. Be surespindle will rotate freely between stops.Do not attempt to reposition steering armafter it has cooled below 300 °F (150 °C).

Install front wheel and tighten mount-ing bolts to 85 ft.-lbs. (115 N • m) torque.Lubricate spindle bushings withmultipurpose grease.


All Models

3. Tie rod ends (3 and 6—Fig. 3) arenonadjustable and must be renewed if ex-cessively worn. Lubricate tie rod endswith multipurpose grease.

Front wheel toe-in should be 1/8 inch(3 mm) measured at hub height. Tbe-incan be adjusted without disconnecting tierod from steering arms (1). Remove clampbolt (5) from tie rod tube (4). Loosen tierod end jam nut (7) or clamp, then turninner rod (8) on 6060 and 6070 models ortie rod tube on 6080 models to lengthenor shorten tie rod as necessary to providecorrect toe-in.


All Modeis

4. The axle main member (2—Fig. 1) issupported by pivot pin (1). The pin pivotsin renewable bushings in front supportcasting.

Fig. 2—Press new wear sleeve(13} into wheel hub (It) untiiedgeofsieeveis V* inch (6.35mm} past flush (S} with edgeof hub on Modei 6080 andModeis 6060 and 6070 with 96inch (245 cm} tread, or fiushwith edge of hub on 6060 and6070 modeis with standard


Tb remove axle and pivot pin, raise andsupport front of tractor so no weight iscarried on front axle. Disconnect hosesfrom power steering cylinder and cap allopenings Remove retaining ring (4) fromrear of pivot pin, then push pin out of ax-le and front support and remove axle.

Inspect bushings for wear and renew asnecessary. Bushings are presized andshould not require reaming if carefullyinstalled.

Ib reinstall axle, reverse the removalprocedure. Install pivot pin with onethrust washer (3) at front (insidewishbone) and one washer between axleand front support. Push pivot pin fullyrearward, then install as many washersas possible on rear of pin, but still be ableto install retaining ring (4). Lubricatebushings with multipurpose grease.

Fig. 3—Expioded view of tierod assembiy used on 6060and 6070 modeis. Modei 6080

is simiiar.1. Steering arm2. Seal3. Sliding tie rod end4. Tube5. Clamp bolt6. Tie rod end7. Jam nut8. Inner tubea Cylinder



All Models So Equipped

5. Check oil level in front axle housingand final drive housings after every 100hours of operation. Manufacturer recom-mends renewing lubricant at 800 hoursof operation or once a year, whichever

comes first. Fill housings to level plugopenings with Allis-Chalmers PowerFluid 821 or equivalent. Axle housing filland level plug (15—Fig. 4) is located onleft rear side of axle housing. Final drivefill and level plug (24—Fig. 6) must bepositioned at either 3 o'clock or 9 o'clockwhen filling with oil and checking oillevel.

Lubricate axle pivot and steeringlinkage with multipurpose grease.


All Modeis So Equipped

6. Front wheel toe-in should be "0" onfront-wheel drive models. To adjust,

Page 5: Allis Chalmers Models 6070 Tractor Service Repair Manual

Paragraghs 7-8 ALLIS-CHALMERS



Fig. 4—Exploded view of frontdrive axie housing and pivots.

1. Front support2. Pivot hushing3. Thrust washer4. Pivot pin5. Axle housing6. Drain plug7. Bearing retainer screw8. Seals9. Bearings

10. Bearing cap11. Differential carrier12. Thrust washer13. Rear support14. Bushing15. Level plug

Fig. 5—Exploded view of frontdrive axle drive shaft.1. Sleeve2. Spacer3. Snap ring4. Front shaft5. Snap ring6. Sleeve7. Snap ring8. Washer9. Bearing

10. Support11. Rear shaft12. Snap ring


Fig. 6—Exploded view of frontdrive axle final drive assembiyused on Modei 6070 and lateModel 6080 (effective S.N.6235). All other modeis aresimiiar except that parts

shown in inset are used.1. King pins2. Shims3. Steering knuckle4. Bushing5. Stuh axle6. Dust seal7. Oil seal8. Bearings9. Washer

10. Washer11. Locknut12. Spacer13. Shim14. Wheel hub15. Sun gear16. Retaining ring17. Gear support18. Ring gear19. Planetary carrier20. Thrust washers21. Planet gear22. Needle rollers23. Pin24. Drain/fill plug

1819 24

disconnect tie rod end from steeringknuckle arm. Loosen jam nut and turntie rod end in or out to provide correct set-ting. Install tie rod and tighten retainingnut to 70 ft.-lbs. (95 N • m) torque.


All Models So Equipped

7. Front drive axle final drive assemblyand axle shaft assembly can be servicedwithout removing axle housing from trac-tor. To repair bevel pinion shaft or dif-ferential assembly, complete axlehousing must be removed from tractor.

To remove axle assembly, first raisefront of tractor and support with standsunder engine side frames. Remove frontwheela Disconnect hydraulic hoses fromsteering cylinder and cap all openings.Disengage snap ring (3—Fig. 5) fromgroove behind front drive shaft sleeve (1)and disengage snap ring (12) from grooveat rear end of rear drive shaft (11). Moverear drive shaft and center sleeve (6) rear-ward. Slide front sleeve (1) rearward toclear bevel pinion shaft, then removefront drive shaft (4). Pbsition a rollingfloor jack under center of axle housing,remove front and rear axle pivot supports(1 and 13—Fig. 4) and lower axleassembly from tractor.

To reinstall axle, assemble front andrear thrust washers (3 and 12) and pivotsupports (1 and 13) on axle. Raise axleassembly into position and tighten pivotsupport mounting cap screws to 195 ft.-lbs. (265 N • m) torque. Install wheels andtighten lug bolts to 190 ft.-lb& (260 N • m)torque. Force axle assembly fully rear-ward, then remove supports and lowertires to the ground.

Install front drive shaft and sleeve(1—Fig. 5) with original spacer (2), thenmove snap ring (3) into groove in shaft.Move rear drive shaft forward engagingcenter sleeve (6) with front drive shaft.Move snap ring (12) into groove in reardrive shaft, force drive shaft assemblyrearward, then measure clearance be-tween snap ring on bevel pinion shaft andend of front sleeve (1). Clearance shouldbe 0.020-0.060 inch (0.5-1.5 mm). Installdifferent thickness spacer (2), ifnecessary, to obtain desired clearance.Connect steering cylinder hydraulichoses.


All Models So Equipped

8. R&R AND OVERHAUL. Removalof left or right final drive is similar. Raiseand support front of tractor and removefront wheel. Rotate wheel hub so plug


Page 6: Allis Chalmers Models 6070 Tractor Service Repair Manual

MODELS 6060-6070-6080

(24—Fig. 6) is at the bottom, remove plugand drain oil from final drive. Removemounting cap screws and separateplanetary carrier (19) from wheel hub(14). Remove wheel bearing locknut (11)using a suitable spanner wrench.Withdraw ring gear support (17) withring gear (18) and bearing cone as anassembly. Thread two M8xl.25 capscrews into tapped holes in ring gear topush bearing cone off support if renewalis necessary. Remove shim (13) and spacer(12) if so equipped. Remove wheel hubassembly (14). Remove cap screws secur-ing stub axle (5) to steering knuckle (3)and remove stub axle.

Press planet gear pins (23) outwardfrom planetary carrier (19). Removeplanet gears (21) with roller bearings (22)and thrust washers (20).

Planet gear thrust washer thicknesswhen new is 0.030-0.033 inch (0.77-0.083mm). Inspect all hearings for wear,damage or rough operation and renew asnecessary Remove seals from stub axleand wheel hub. Inspect bushing (4) instub axle for wear. Inside diameter ofhushing should be 1.656-1.658 inches(42.05-42.13 mm) on Models 6060 and6070, or 1.774-1.776 inches (45.05-45.13mm) on Model 6080. Running clearanceof axle shaft in bushing is 0.002-0.006inch (0.05-0.15 mm) on all models. Whenrenewing bushing, press bushing intostub axle until seated against counter-bore. Ream bushing inside diameter toprovide desired running clearance.

Install new oil seal into stub axle withspring side of seal facing inward. Installdust seal with cupped side outward.Lubricate seal lip, then install stub axleover axle shaft and tighten mounting capscrews to 83 ft.-lbs. (113 N • m) torque.

Install new bearing cups, if removed, in-to wheel hub (14). Install new oil seal (7)into wheel hub with spring side of sealfacing inward. Be sure seal seats againstcounterbore. Install dust seal (6) with cup-ped side facing outward. Install wheelhub, bearings and spacer (12) and shim(13), if so equipped, and ring gear support(17) with ring gear (19). Install washersand locknut (11). Adjust wheel bearingpreload as follows.

On Model 6060 and early Model 6080(prior to S.N. 6235), tighten locknut (11)to 375 ft.-lbs. (510 N • m) torque whileturning wheel hub to make sure bearingsremain free. Wrap a string around outerflange of wheel hub and attach a springscale. Measure wheel hub rolling torqueusing the spring scale. Specified rollingtorque is 10-40 in.-lbs. (1.1-4.5 N • m)which corresponds to spring scalereading of 2-7 pounds (9-31 N) for 6060or 1.5-5.5 pounds (6.7-24.4 N) for 6080modela Tb increase rolling torque, installa thinner shim (13). Tb decrease rollingtorque, install a thicker shim.

On Model 6070 and late Model 6080 (effective S.N. 6235), wrap string aroundouter flange of wheel hub and attach aspring scale. Use the spring scale tomeasure hub rolling torque whiletightening locknut (11). Tighten nut un-til spring scale reading is within rangeof 2-7 pounds (9-31 N) for Model 6070 or1.5-5.5 pounds (6.7-24.4 N) for Model6080.

Assemble planetary gears (21) withbearing rollers (22) and thrust washers(20) into planetary carrier. Installplanetary pins (23) into carrier and gears.Apply bead of R.T.V. silicone sealeraround mounting surface of planetarycarrier, then install sun gear (15) andplanetary unit on wheel hub. Tightenmounting cap screws to 47 ft.-lbs. (64N • m) torque.

Refill final drive unit to proper levelwith AUis-Chalmers Power Fluid 821 orequivalent. Install wheel and tire andtighten lug bolts 192 ft.-lba (260 N • m)torque.


Ail Models So Equipped

9. R&R AND OVERHAUL. Raise andsupport front of tractor and remove frontwheel. Drain oil from final drive housingand axle housing. Remove final driveassembly as outlined in paragraph 8.Remove axle bearing retaining screw(7—Fig. 4) fron^ axle housing, then pullaxle shaft (Fig. 7) with universal joint andbearing from axle housing.

Paragraph 9

Remove snap ring (6) and bearing sup-port assembly (8) from axle shaft. Removesnap rings (7), bearing (10) and seals (11and 12) from bearing support. Seals (13and 14) are located in stub axle.

Disconnect tie rod and steeringcylinder (right-hand side) from steeringknuckle (3—Fig. 6). Remove king pins (1)and separate steering knuckle from ax-le housing. Examine seals (8—Fig. 4) andbearings (9) for wear or damage andremove from axle housing if renewal isnecessary.

Ib reinstall, reverse the removal pro-cedure while noting the following specialinstructions: Install oil seal (11—Fig. 7)with spring side of seal facing bearing(10). Install dust seal (12) with cuppedside outward. Install oil seal (14) into stubaxle with spring side of seal facing in-ward. Install dust seal (13) with cuppedside facing outward. Be sure dust sealscontact the oil seals. Lubricate oil sealsbefore installing over axle shaft.

NOTE: If axle shafts from both sides havebeen removed, note that right-hand axleshaft is slightly longer than left-hand shaft.Be sure they are installed in their correctlocations.

Install axle shaft assembly into axlehousing and secure with retaining screw.Make certain retaining screw engagesgroove in bearing support (8).

Install new king pin bearings (9—Fig.4) and seals (8), if necessary, making cer-tain they are seated in bottom of axlehousing bores. Be sure lip of seal is fac-ing inward. Position steering knuckle onend of axle housing and install king pina

Fig. 7—Exploded view offront-wheel drive axle shaftassembly. Dust seai (13} andoil seai (14) are located in stubaxle. Note thatLH. inner axleshaft is shorter than R. H. inner

axie shaft1. Axle shaft, inner2. Lock ring3. Universal joint4. Yoke5. Axle shaft, outer6. Snap ring7. Snap ring8. Bearing support9. "O" ring

10. Bearing11. Oil seal12. Dust seal13. Dust seal14. Oil seal

Page 7: Allis Chalmers Models 6070 Tractor Service Repair Manual


Install king pin mounting cap screwsfinger tight, complete installation of finaldrive assembly, then adjust king pinbearing preload as follows:

Remove grease fitting or plug andmounting cap screws from upper kingpin. Install special plate ACTP-3080(1—Fig. 8) on upper king pin, install kingpin cap screws (2) and tighten to 47 ft.-lbs. (64 N • m) torque. Use a torquewrench (3) to measure torque required toturn planetary unit. Specified torque is58-72 ft.-lbs. (79-97 N • m) torque. To in-crease torque reading, decrease thicknessof shims (2—Fig. 6) on lower king pin. Tbdecrease torque reading increase shimthickness. Shims should only be install-ed on lower king pin. Remove specialplate from upper king pin, reinstallmounting cap screws and tighten to 47-fl.-lbs. (64 N * m) torque.

Refill final drive housing and axle hous-ing to correct levels with Allis-ChalmersPower Fluid 821 or equivalent.

Fig, 8—'install speciat plate ACTP-3080 (1} on up-per king pin, f/ien use a torque wrench (3) tomeasure torque required to turn planetary unit, tn-staii shims on iower king pin oniy to adjust king pin

bearing preioad.

7̂ 1 L.


All Models So Equipped

10. R&R OVERHAUL. Axle assemblymust be removed from tractor as outlin-ed in paragraph 7 to remove differentialassembly. Planetary assemblies can beremoved as complete units if disassemblyis not necessary. Remove drain plugs anddrain oil from final drive housings andaxle housing. Support planetaryassembly with an overhead hoist, removeking pins and separate completeplanetary unit from axle housing. Loosenaxle bearing retainer screws (7—Fig. 4),then pull axle shaft assemblies from axlehousing. Remove cap screws retaining dif-ferential carrier housing (11), thenremove carrier with differentialassembly from axle housing.

Block teeth of pinion gear and ring gearto prevent pinion shaft movement, thenloosen pinion shaft locknut (1—Fig. 9),mark differential carrier bearing caps tocarrier housing so they can be reinstalledin their original positions. Remove bear-ing caps and adjusting rings (15). Lift dif-ferential and ring gear assembly fromcarrier housing.

Remove pinion shaft locknut, thenpress pinion shaft (10) assembly out ofcarrier housing. Drive seals and bearingcups from housing as necessary.

Remove ring gear mounting cap screwsand separate ring gear (11) from differen-tial case (12). Remove screw (13) retain-ing pinion gear shaft (18). Push shaft outof case and remove pinion gears (17), sidegears (19) and thrust washers (16 and 20).

Inspect gears, bearings and thrustwashers for wear or damage and renew

3 ? 1

Fig. 9—Exploded view offront-wheel drive differentialand bevei gear assemblies.

l.Nut2. Dust seal3. Oil seal4. Spacer5. Bearing6. Shim7. Spacer8. Bearing9. Shim

10. Bevel pinion11. Bevel ring gear12. Differential case13. Retaining screw14. Carrier bearings15. Adjuster rings16. Thrust washer17. Pinion gear18. Shaft19. Side gear20. Thrust washer

if necessary. Running clearance of shaftin pinion gears should be 0.003-0.005inch (0.08-0.12 mm). Thickness of piniongear thrust washers is G.058-0.060 inch(1.47-1.53 mm) when new. Side gearthrust washers are available in twothicknesses of 0.059 inch (1.5 mm) or0.063 inch (1.6 mm) and are used to ad-just side gear end clearance. Note thatside gears and pinion gears and the bevelring gear and pinion gear are availableas complete gear sets only.

Ib check and adjust differential sidegear (19) clearance, assemble side gearswithout thrust washers and pinion gearswith thrust washers into differentialcase. Install pinion gear shaft and retain-ing screw. Use a depth micrometer (Fig.10) to measure distance from edge of caseto the end of one of the side gears withgear pushed inward against pinion gearsand with gear pulled outward againstcase. Subtract measurement with gearheld outward from measurement withgear held inward to determine side gearclearance, then subtract O.OIO inch (0.25mm) from the clearance figure. The resultis thickness of thrust washer (20—Fig. 9)that should be installed to providedesired end clearance of 0.010 inch (0.25mm). Repeat the procedure for side gearon opposite side as different thicknesswasher may be required to providedesired end clearance for each gear.

Disassemble differential gears, thenreassemble using correct thicknessthrust washera Peen head of pinion shaflretaining screw (13) to prevent loosening.Install ring gear (11) onto case (12) andtighten mounting cap screws evenly to95-ft.-lbs. (129 N • m) torque.

Reinstall and adjust bevel pinion shaft(10) and differential assembly as outlinedin paragraphs 11 through 14.

Install differential support housing in-to axle housing and tighten mountingcap screws to 83 ft.-lba (113 N * m) torque.Reinstall axle shafts and final driveunita Reinstall axle assembly under trac-tor. Refill axle housing and final drivehousings to correct levels with Allis-Chalmers Power Fluid 821 or equivalent.

Fig. 10—Use a depth micrometer to measuredistance from edge of case to end of side gear todetermine thickness of thrust washer required to

provide proper end clearance. Refer to text.


Page 8: Allis Chalmers Models 6070 Tractor Service Repair Manual

MODELS 6060-6070-6080 Paragraphs 11-12

11. PINION GEAR DEPTH. If bevelpinion shaft (10—Fig. 9), bearings or car-rier housing is renewed, pinion geardepth must be set. Pinion positioninggage set ACTP-3115 is required to proper-ly set pinion depth.

Install front and rear pinion bearingcups in carrier housing. From gage set,assemble drawbolt (1—Fig. 11), frontaligner (6), dummy pinion (4), rearaligner (2) and drawbolt (1) with front andrear bearing cones into suppport housing(5). Wrap cord around dummy pinion anduse a spring scale to measure force re-quired to turn dummy pinion.

NOTE: Dummy pinion cannot be turned acomplete revolution during rolling torquecheck. Make several readings to ensure ac-curate reading is obtained.

Specified rolling torque is 10-30 in.-lbs.(1.1-3.4 N ' m) which is equivalent tospring scale reading of 7.5-21.5 pounds(34-96 N). Adjust nut on drawbolt (1) toset tollirlg torque within specified range.

Install differential carrier bearingcups, adjusting rings and bearing caps(10) onto housing. Tighten bearing capmounting cap screws (11) to 83 fl.-lb& (113N • m) torque. Assemble cones (12), crosstube (13) and nut (8) into housing asshown making certain cones are seatedin bearing cups. Measure clearance be-tween end of dummy pinion and crosstube using a feeler gage (7).

Note correction number (expressed inmillimeters) etched on gear end of pinionshaft. Tb convert correction number to in-

ches, divide by 25.4. The correctionnumber will be preceded by a + (plus) or- (minus) mark. Add or subtract(whichever way number is marked) thecorrection number from nominal dimen-sion, which is 4.528 inches (115 mm). Theresult is corrected pinion depthdimension.

Add the following values: length ofdummy pinion (stamped on tool), ^diameter of cross tube (measure diameterand divide by 2), and clearance betweendummy pinion and cross tube (measuredwith feeler gage). Subtract correctedpinion depth dimension from total of thethree values. The result is thickness ofshim (9—Fig. 9) required to properly setpinion depth.Example:Nominal

dimension . . . .4,528 in. (115.00 mm)Add or subtract

correctionnumber , . . . +0.002 in (0.05 mm)

Result iscorrectedpinion depth , .4,530 in. (115.05 mm)

Dummy pinionlength 3.654 (92.80 mm)

Plus V2 diameterof cross tube +0.960 in. (24.38)

Plus feeler gagethickness ., , +0.034 in. (0.86 mm)

Total 4,648 in. (118,06 mm)Minus corrected

pinion depth —4,530 in. (115.06 mm)Thickness of

shim required ,0.118 in. (3.0 mm)

Fig. 11—View showing use ofpinion positioning gage setACTP-3i 15 when setting pin-ion gear depth. Refer to text.

1. Drawbolt2. Bearing aligner3. Bearing cone4. Dummy pinion5. Differential support housing6. Bearing aligner7. Feeler gage8. Ring nut9. Pin

10. Bearing cap11. Cap screw12. Cones13. Cross tube

Remove pinion setting toola Install cor-rect thickness shim (9—Fig. 9) onto pinionshaft with chamfered ID side facing gearend of shaft. Press front bearing cone on-to shaft until seated against shim. Installpinion shaft assembly and adjust bear-ing preload as outlined in paragraph 12.

12. PINION SHAFT BEARING AD-JUSTMENT. Pinion bearing preloadmust be checked and adjusted wheneverpinion shaft (10—Fig. 9), bearings (5 and8) or carrier housing is renewed. Bearingpreload is adjusted by installing a dif-ferent thickness shim (6).

Assemble pinion shaft assembly usingoriginal thickness shim (6). Be sure bear-ing cone (5) is seated against shim. Do notinstall seals (2 and 3) at this time.Tighten locknut (1) to 217 fl.-lba (294N • m) torque. Wrap a string (3—Fig. 12)around pinion shaft locknut (1), then usea spring scale to measure force requiredto rotate shaft. Specified rolling torqueis 10-30 in.-lbs, (1.1-3,4 N • m) which isequivalent to spring scale reading of 9-27pounds (40.5-121 N).

Tb adjust bearing preload, install athinner shim (6—Fig, 9) to increase roll-ing torque or install thicker shim todecrease rolling torque.

After adjustment is complete, removelocknut and install new oil seal (3) anddust seal (2). Be sure spring side of oil sealfaces inward and cupped side of dust sealfaces outward. Reinstall locknut andtighten to 217 ft.-lbs. (294 N • m) torque.Record final spring scale rolling torquereading for use in setting differential car-rier bearings (paragraph 13),

13 Fig. 12—Wrap a string around pinion shaft iocknutand use a spring sca/e to measure pinion roiiing

torque.1. Locknut2. Support housing 4. Pinion3. String 5. Spring scale


Page 9: Allis Chalmers Models 6070 Tractor Service Repair Manual

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Page 10: Allis Chalmers Models 6070 Tractor Service Repair Manual

Paragraghs 13-15 ALLIS-CHALMERS

13. DIFFERENTIAL CARRIERBEARING PRELOAD ADJUSTMENTBefore reinstalling differential assembly,wrap a string around pinion shaftlocknut (1—Fig. 12) and attach a springscale. Use the scale to measure force re-quired to rotate pinion shaft and recordreading for later use.

Install differential and ring gearassembly with carrier bearings and ad-juster rings in carrier housing. Installcarrier bearing caps in their originalpositions and tighten mounting capscrews to 43 ft.-lbs. (58 N • m) torque.Loosen cap screws, then retorque to 14 ft.-lbs. (19 N • m). Tighten adjuster ringsagainst bearing cups until pinion shaftrolling torque (spring scale reading) is4.5-9 pounds (20-40 N) more than readingtaken of pinion shaft only.

Adjust ring gear backlash as outlinedin paragraph 14.

14. RING GEAR BACKLASH AD-JUSTMENT. Mount a dial indicator(1—Fig. 13) on carrier housing so probecontacts edge of ring gear tooth at 90°angle. While holding pinion shaft,measure ring gear movement at three dif-ferent locations around gear. Backlash atall three locations should be within rangeof 0.007-0.009 inch (0.18-0.23 mm).

Tb adjust backlash, first mark positionof both bearing adjusting rings in rela-tion to carrier housing. To decreasebacklash, loosen adjusting ring (7) on sideopposite ring gear and tighten adjustingring (3) on ring gear side. To increasebacklash, loosen adjusting ring (3) on

Fig. 14—Expioded view offront-wheei drive transfer

gearbox,1. Drive gear2. Idler gear3. Thrust washers4. Bearing rollers5. Spacer6. Pin7. Idler shaft8. Dust seal9. Oil seal

10. Snap ring11. Bearing12. Spacer plate13. Snap ring14. Output shaft15. Driven gear16. Bearing17. Plug18. Handle19. Bearing flange20. Bearing21. Control rod22. Outer control lever23. Case24. Drain plug25. Plug26. Sealing washer

27. Shifter lug28. Inner shifter lever

29. Detent plunger30. Spring

ring gear side and tighten adjusting ring(7) on side opposite ring gear.

NOTE: One adjusting ring must be tight-

ened the same amount as adjusting ring on

opposite side is ioosened to maintain dif-

ferential bearing preioad setting.

After ring gear backlash is set, recheckpinion shaft rolling torque to make surebearing preload setting is still correct.Then, install adjusting ring retainerplates to prevent adjusting rings fromloosening. Tighten bearing cap retainingscrews (5) to final torque of 83 ft.-lbs. (113N-m).

Fig. 13~'Position a diai in-dicator against tooth of ringgear to measure ring gear

backlash.1. Dial indicator2. Support housing3. Bearing adjuster ring L.H.4. Ring gear5. Cap screw6. Bearing cap7. Bearing adjuster ring R.H.


All Models So Equipped

15. R&R AND OVERHAUL. Toremove gearbox, first remove drain plug(24—Fig. 14) and drain oil from rear hous-ing and gearbox. Remove front drive shaftas outlined in paragraph 7, then moverear drive shaft forward until it clearsgearbox output shaft. Disconnect controlrod (21) from shift lever (22). Remove gear-box mounting cap screws and lower gear-box from rear housing.

To disassemble, drive roll pin (6) fromhousing (23). Pull idler shaft (7) forwardfrom housing and remove idler gear (2)with bearing rollers (4), spacer (5) andthrust washers (3), Remove dust seal (8),oil seal (9) and snap ring (10), thenwithdraw output shaft (14) with spacer(12) and front bearing (11) from housing.Remove driven gear (15), shifter lug (27)and rear bearing (16). Drive roll pin fromouter shift lever (22) and remove outerlever and inner shift lever (28). Removeplug (25), spring (30) and detent plunger(29). Remove and discard "O" ring (31)and backup ring (32). Drive out plug (17)if necessary.

Inspect all parts for wear, scoring orother damage and renew as necessary.

Tb reassemble, reverse the disassemblyprocedure while noting the followingspecial instructions: Lubricate "O" ririg(31) before installing inner shift lever(28). Be sure outer shift lever (22) pointsforward when inner lever is downward.Stepped face of spacer plate (12) must faceforward. Lubricate oil seal (9), theft in-stall with spring side facing inward. In-stall dust seal (8) with cupped sideoutward.

Reinstall gearbox assembly andtighten mounting cap screws to 72 ft.-lba