Allis Chalmers Models 7060 Tractor Service Repair Manual

DUAL DIMENSIONS

ThisservicemanualprovidesspecificationsinboththeU.SCustomaryand Metric(SI)systemsofmeasurement.Thefirstspecificationisgiveninthe measuringsystemperceivedbyustobethepreferredsystemwhenservicinga particularcomponent,whilethesecondspecification(giveninparenthesis)isthe convertedmeasurementForinstance,aspecificationof"0.011inch(0.28mm)" wouldindicatethatwefeelthepreferredmeasurement,inthisinstance,isthe U.Ssystemofmeasurementandthemetricequivalentof0.011inchis0.28mm

CONDENSED SERVICE DATA Models

3,2465-3.248in. (82.461-82.499mm)

-2,7470-2.7485in(69.773-69,811mm)

—2.130-2.131in. (54.10-54,13mm) -1.5011-1,5013in(38.127-38.133mm)

-0.3715-0.3720in,(9.436-9,448mm)

-0.3705-0.3710in.(9,410-9.423mm)

0.0019-0.0051in. (0.048-0.129mm)

-0,001-0.004in.(0.02-0.10mm)

0.0025-0.0050in, (0.063-0.127mm) —0,007-0.013in. (0.18-0.33mm)

-0.002-0,006in.(0,050-0.15mm)

CONDENSED SERVICE DATA (Cont.)

Models 7045-7050-7060-7080

CONDENSED SERVICE DATA (Cont.)

—0.007-0,013in(0,18-0.33mm)

-0.002-0.006in.(0.05-0.15mm))08m.

0.0027-0.0083in. (0.068-0.21( 32qts

-SeeEndofShopManualSeeParagraph30 -150ft.-lb&(203.2N< -135ft.-lhs.(182.9N^m)m)—40-60ft,-lb&(54.2-81.3N»m) -170-190ft.-lbs.(230,3-257.4N*m)-

FRONT AXLE SYSTEM

SPINDLES AND BUSHINGS

1, R&R SPINDLES. Toremove frontspindle(15-Fig1),supportfront oftractor,removefrontwheelandproceedasfollows:Removesnapring(10) andpullsteeringarm(9)fromspindle

Removalofsteeringarmwillprobably cequireittobecutoffusingasuitable torchduetoextremepressfitRemove key(12)andwithdrawspindlefrombottomofaxleextension(11)Remove thrustwashers(16)fromspindle

Installtwothrustwashers(16)on spindle(15)andinstallitinaxleextension(11)frombottomInstallkey(12) Heatsteeringarm(9)to600^F(315°C) andpressitonspindlesomaximum shaftendplayis0,030inch(0.76mm).

Spindleshouldrotatefreelybetween stopsandsteeringarmmustbeclearof snapringgrooveinspindleAnyadjustmentofsteeringarmonspindlemustbe madepriortosteeringarmcoolingto below300°F(148°C).Reseatingor removalofsteeringarmafterithascool-

edbelow300°F(148'^'C)willprobablyrequireittobecutoffwithatorchdueto extremepressfit,

graph1Removebushings(13and 14-Fig.1)usingasuitablebushing driverordriftpunchNewbushingsare presizedandshouldnotrequirereaming ifcarefullyinstalled.Installupperand lowerbushingsinaxleextension(11),usingasuitablepressorshoulderpunch,

2. R&R SPINDLE BUSHINGS. Spindlebushingscanberenewedafter removingspindleasoutlinedinpara-

Flg, I-'Exploded view of adlustable front axle assembly,

untiltheyareflushto0.030inch(0.76 mm)belowendofboreReinstallspindle asoutlinedinparagraph1.

TIE RODS AND TOE-IN

3Toe-inoffrontwheelsshouldbe 3/32to7/16inch(2.4to11.1mm) measuredfromODoftireatspindle height.Toadjusttoe-inremovenut (6-Fig2)anddisconnecttierodend(1) fromspindleLoosenjamnut(2)and turntierodendinoroutasnecessaryto correcttoe-in.

AXLE EXTENSIONS

4Torenewaxleextension(11-Fig 1),removespindleasoutlinedinparagraph1,thenremovetreadwidthadjustingboltsandwithdrawaxleextensionfrommainmember(19).

AXLE CENTER (MAIN)MEMBER AND PIVOT PIN

5.Theaxlecenter(main)memberisa weldedone-pieceassembly(19-Fig.1).

Thecentermemberpivotsononelong pin.Thepinpivotsinrenewable bushingsinfrontsupportcasting Torenewthepivotpin,proceedas follows:Supporttractorundertorque housingsothatnoweightiscarriedon frontaxle.Then,removetheretaining boltanddriveoutpivc»tpinThen,raise frontoftractoruntilfrontsupportis clearofaxleanddrivebushingsoutof frontsupportcastingwithsuitable driver.Newbushingsarepresizedand shouldnotrequirereamingifcarefully installedInstallpivotpin(18)withone thrustwasher(17)atrearInstall enoughthrustwashers(17)atfrontto establishanendplayof0.00-0.17inch (0.0-4.3mm)

Torenewaxlecenter(main)member, removebothaxleextensionsasoutlined inparagraph4,discornectpowersteeringcylinderatboth3ndsandremove frontaxlepivotpin.

POWER STEERING SYSTEM

All modelsareequippedwithhydrostaticpowersteeringsystemthathasno mechanicallinkagebetweensteering wheelandfrontsteeringcylinderRefer toFig.3fordrawingshowingthesteeringsystem

Therearethreepumpslocated togetherundertherangetransmission. Pumpsaredrivenbyashaftfromthe ptogeartrainPumpsarebolted togetherinonehousingbutareofdifferenttypeandsupplyoiltethree separatecircuitsAbriefdescriptionof thepumpsfromfronttorearfollows.

RefertoFig4

Frontpumpisanaxialpistonpump whichdeliversoiltothefollowing:

13-pointhitch

2. Remotecontrolvalve.

3Powertake-offvalve

4Differentiallockvalve

5.Brakescontrolvalve.

Middlepumpisageartypewithaflow dividerFlowdividersplitsoutputinto priorityandsecondaryflowandsupplies

oilforthefollowingfunctions:

APriorityflow:

1.Powersteering.

2Coolingoilinrearaxle

3.Filteringoilinrearaxle.

BSecondaryflow:

1Lubricatingandcoolingoilfor brakes.

2. Lubricatingandcoolingoilfor ptocluteh

Rearpumpisagerotortypeandis recessedintorangetransmissionhousingItistheonlypumpthatisnotvisible

fromtheoutsideoftracterThispump suppliesoiltethefollowing:

1.Powerdirecterclutehorpower shiftcluteh

2Powerdirectororpowershift clutehes,lubricationandcooling

3.Lubrication,coolingandfilteringof standardandrangetransmissions

Thecontrolvalveunit(8-Fig.3)containsarotarymeteringmotor,acommutatorfeedvalvesleeveandaselecter valvespoolIneventofengineor hydraulicpowerfailure,themetering motorbecomesarotaryhandpumpto actuatethepowersteeringcylinder

whensteeringwheelLSturned.Acheck valve within the gear pump housing allowsrecirculation(ffluidwithinthe controlvalveandsteoringcylinderduringmanualoperation

NOTE: The malnteniince and absolute cleanliness of all parts Is of utmost Importance In the operation iind servicing of the hydraulic power steertr g system.Of equal Importance is the avoidance of nicks or burns on any of the working parts Do not use cioth shoptowels in cieaning internal parts; use only lint-freo shop toweis

Fig. 2^Expioded ¥lew of tie rod and components. Refer to text

Fig. 3-A schematic showing components of hydrauiic power steering system. No mechanicai linkage is used between steering wheei and tractor front wheels.

Paragraphs 6-8

TROUBLESHOOTING

6Beforeattemptingtoadjustor repairthepowersteeringsystem,the causeofanymalfunctionshouldbe locatedRefertothefollowingparagraphsforpossiblecausesofpower steeringsystemmalfunction:

Irregular or "Sticky" Steering. Ifirregularor"sticky"feelingisnotedwhen turningsteeringwheelwithforward' motionoftractorstoppedandwith enginerunningatratedspeed,orif steeringwheelcontinuestorotateafter beingturnedandreleased,foreign materialinthepowersteeringfluid (transmissionoil)isprobablecause. Cleanorrenewallhydraulicsystem filters.Itwillbenecessarytoalsodrain transmissionoilandrefillwithcleanoil Alsocheckforairleaksingearpump suctionlinewhichwillcausepumpto cavitateIftroubleisnotcorrected,the powersteeringcontrolvalveassembly shouldberemovedandserviced;referto paragraph10

Steering Cylinder ''Hesitates*'. If steeringcylinderappearstopausein travelwhensteeringwheelisbeing turnedsteadily,probablecauseoftroubleisairtrappedinthepowersteering cylinderBleedcylinderasoutlinedin paragraph7

Slow Steering. Slowsteeringmaybe causedbylowoilflowfrompumpCheck timerequiredforfullstroketravelof powersteeringcylinder;first,withtractorweightonthefrontwheels;then, withfrontendoftractorsupportedbya jackIftimebetweenthetwochecks variesconsiderably,overhaulpower steeringpumpasoutlinedinparagraph 151

Loss of Power. Lossofsteering powermaybecausedbysystemrelief settingbeingtoolowCheckandadjust reliefvalvesettingasoutlinedin paragraph11

Left,rearfluidfilter(9-Fig5)pluggedorwrongsize.Filtershoiidbe 6.10-6.16inches(154.9456.4mm)long

Orificedisc(8-Fig6)ingearpump flowdividerplugged.Removespool(4)

fromgearpumpandcleanorificeplate

Reliefvalve(8-Fig.9)insteeringcontrolvalvestuckopenSteeringcontrol valveassemblyshouldberemovedand serviced;refertoparagraph10.

System Overheats. Overheatingof systemmaybecausedbyneutral(bypass)pressurebeingtoohighIfneutral pressureisexcessive,checkforobstructionsinsystemsuchaskinkedtube,etc Ifneutralpressureiserratic,checkfor bindingofcontrolvalveshaft,spool and/orsleeve

Toomuchoilinrearhousingsump. Shutoffengineandallowtractorto standfor10minutes,checkoillevel throughsightglassinrearhousing

Drainasnecessary

LUBRICATION AND BLEEDING

7Differentialandfinaldriveoilis utilizedasthepowersteeringfiuid.The filter,showninFig5islocatedinlower frontpartofdifferentialhousingonlefthandsideThisfilterisforthegear pumpwhichsuppliesthepowersteering,andshouldberenewedafterthe first50hoursandthereafternottoexceedover1000hoursThepowersteeringsystemisusuallyself-bleedingWith enginerunningathighidlespeed,cycle systemthroughseveralfullstrokesof thecylinderInsomecases,itmaybe necessarytoloosenconnectionsat cylindertobleedtrappedair.

8.Powersteeringreliefpressurecan becheckedbyconnectingaFlo-RaterintotestportofgearpumpRefertoFig 4showingtestportlocationandtoFig. 7showingFlo-RaterconnectedConnect

Fig, S — Fliter on ieft side of rear housing is fiiter for gear pump.

COMPthlSATOR

Fig. $-Expioded view of fiow divider.

review of the three hydraulic pumps used. Test port (T) is used for diagnosis of gear pump hydraulic system.

Fig. 7 - View of hydrauiic tester connected for testing power steering system. Refer to text.

outletfromFlo-Ratertoremoteoutlet ontractorMAKESUREREMOTE VALVELEVERFOROUTLETTHAT ISCONNECTEDTOFLO-RATERIS INFLOATPOSITIONThisistoassure sufficientoiltochargethepistonpump Startengineandoperateat1500rpm. Turnsteeringwheeltooneendofits travelandholdinthatposition.Turn restrictorvalveonFlo-Rateruntil 1000-1500psi(6.810.3MPa)readingis obtained.Operateinthismanneruntil fluidreachesatemperatureof 130°-140°F(54.4°-60.0°C)After temperaturehasbeenreached,increase enginespeedto2300rpmandcheck flowat1000psi(6.96MPa)withsteeringwheelheldatendoftravel.Flow shouldbe5.25to5.75gpm(19.8-21,7 L/min.)Then,reduceenginespeedto 1100rpmatwhichpointflowshouldnot belessthan3.0gpm(11.3L/min.)for Model7010,7020and7045tractors,or 3.5-4.5gpm(13.2-17.0L/min.)forall othermodelsSetenginespeedat2300 rpmandcloserestrictorvalvetocheck steeringreliefvalvepressure.This pressureshouldbe1800-2000psi (12.4-15.88MPa)at2300rpmIfrelief valvepressureisfoundtobeincorrect, theupperendoforbitrolmotorwillhave toberemovedtoadjustthereliefvalve Ifflowisnotasstated,flowdivider couldbedefectiveorpumpmaybeworn andnotproducingenoughvolume

Tocheckpumpvolumeproceedas follows:Removeflowdividercap (3-Fig6),spool(4),orificedisc(8)and spring(9).Disconnectprioritylineto steeringvalveandplugfittingatflow dividerDisconnectsecondarylinetodifferentiallockvalveandplugfittingat fiowdivider

CAUTION: Make sure restrictor valve on flow-tester is in open position as there is no relief valve protection.

Startengine,runat2300rpmandadjustrestrictoronFlo-Rateruntilthereis apressurereadingof2000psi(13.79 MPa)Atthistime,fiowshouldbe9gpm (34.0L/min.)minimum.Ifcorrect pressureandflowarefound,butthereis stilldifficultywiththesteering,steeringvalveorsteeringcylindercouldbe thetroubleBeforeremovingsteering valve,checksteeringcylinderasfollows: Removebothhosesfromcylinderand connectcylinderhosestogetherAttempttorotatesteeringwheel.Ifsteeringwheelwillnotrotate,steeringvalve isokayandtroubleisinsteering cylinder.Ifsteeringwheelwillrotate, troubleisinsteeringvalve

POWER STEERING PUMP

9Thegeartypepumpisthecenterof threepumpsundertherangetransmissionwheretheyaredrivenbyashaft fromptogeartrain

Forserviceinformationonallthree pumpsrefertoparagraph149.

CONTROL VALVE

10 REMOVE AND REINSTALL. Removehoodanddisconnectthefour hosesfromcontrolvalve.Unboltand removecontrolvalveassemblyfrom steeringshafthousing.

Reinstallcontrolvalvebyreversing removalprocedureRefertoFig8for properhoselocations.Installnew"0" ringsealsonhosefittingsbeforeconnectinghosestocontrolvalveandtighten fittingssecurelyBleedtrappedairfrom powersteeringcylinderasoutlinedin paragraph7afterassemblyiscompleted.

11 OVERHAUL CONTROL VALVE. Afterremovingcontrolvalve asoutlinedinparagraDh10,proceedas follows:Cleanvalvethoroughlyand removepaintfrompontsofseparation withawirebrush.

NOTE: A clean work bench is necessary Also, use only lint-free paper shop towels for cleaning valve parts.

Ifoilleakagepasts;eal(1-Fig.9)is theonlydifficulty,anewsealcanbeinstalledafterremovingmountingplate (2).Installnewquadring(3)and"0" ring(4)inmountingplate;thenreinstall mountingplateandtightenretaining capscrewsequallytoatorqueof21 ft-lbs(28.35N-m)

Tocompletelydisassembleandoverhaul,refertoexplodedviewinFig.9 andproceedasfollows:Clampvalve mountingplateinvisewithcapendup. Removeretainingcapscrews(23) Removeendcap(22),gerotorset(20and 21),plate(17)anddri\eshaft(18)from valvebodyasaunit.Removevalvefrom vise,placeacleanwoodblockinvise throatandsetvalveassemblyonblock withmountingplate(^:)endupLightly clampviseagainstportfaceofvalve bodyandremovemountingplateretainingscrews.Holdspoc'lassemblydown againstwoodblockwhileremoving mountingplate.Removevalvebody fromviseandplaceonworkbenchwith portfacedown.Carefillyremovespool andsleeveassembly(15and16)from 14-holeendofvalvebody.Usinga screwdriver,removereliefvalveplug(8) fromhousing;then,renovespool,guide andspring

Removecenteringpn(13)fromspool andsleeveassembly,holdsleeveand

IConnecl to Rwl endofCyl.)

PORT toFump Line)

Fig. 8 — View of steering controi valve showing port iocations. Pressure tube from pump connects to **IN" port; return tube to sump connects to "OUT* port; tube to rear end of cylinder connects to "L" (ieft turn} port; and tube to rod end of cyiinder connects to "ff" (right turn) port.

Fig. 9—Exploded view of steering controi assembiy. Centering springs (14) are instaiied in two groups of three springs with arch in each group back-tO'ba'7k.

pushspool,(splinedendfirst)outof sleeveRemovethesixcenteringsprings (14)fromslotinspool.

Separateendcapandplatefrom gerotorsetandremovedriveshaft, rotorandspacer.

Inspectallmovingpartsforscoring. Slightlyscoredpartscanbecleanedby hand,rubbingwith400gritabrasive paper.Toreconditiongerotorsection surfaces,placeasheetof600gritpaper onplateglass,lappingplateorotherabsolutelyflatsurfaceandremovesharp particlesfrompaperwithafiatpieceof scrapsteelStrokeeachsurfaceofthe gerotorsectionovertheabrasivepaper; anysmallbrightareasindicateburrs thatmustberemovedPolisheachpart, rinseincleansolventandairdry;keep thesepartsabsolutelycleanfor reassembly.

Renewallpartsthatareexcessively worn,scoredorotherwisedamagedInstallnewsealkitwhenreassembling.

Toreassemblevalve,proceedas follows:Installreliefvalveguideon spoolandinstallinreliefvalvehole Then,installspringandplugwithnew "0"ringTurnpluginuntilitisatleast flushwithhousingsurfaceTheexact reliefvalvesettingshouldbecheckedon ateststandaftervalveisassembled

Lubricatevalvespoolandcarefullyinsertspoolinvalvesleeveusinga twistingmotion.Besurethatspring slotsinspoolandsleeveareatsameend ofassembly.Standassemblyonend withspringslotsupandaligned.Assemblethespringsintwogroupswithex-

tendededgesofspringsdownPlacethe twogroupsofspringsback-to-back(archedsectionstogether)andinstallspringsintospringslotinsleeveandspool inthisposition.Useasmallscrewdriver toguidespringsthroughslotsinoppositesideofassemblyCentersprings insleevewithedgesflushwithupper surfaceofsleeveInsertcenteringpin (13)throughspoolandsleeveassembly sothatbothendsofpinarebelowfiush withoutsideofsleeve(15)Onsome models,nylonplugsarelocatedatends ofcenteringpintopreventpinfromcontactinginsidediameterofvalvebody Carefullyinsertspoolandsleeve assembly,splinedendfirst,in14-hole endofvalvebody(12)

Setvalvebodyoncleansurfacewith 14-holeenddown.Installlocator bushing(5)invalveborewithchamfered sideupInstallthrustbearingassembly (6and7)overvalvespool(16).Install newquadring(3)and"0"ring(4)in mountingplate;lubricatesealandinstall mountingplateovervalvespooland locatorbushingTightenmountingplate retainingscrewsevenlytoatorqueof21 ft.-lbs.(28.35N-m).Clampmounting plateinavisewith14-holeendofvalve bodyupPlaceplate(17)andgerotor outerring(21)onvalvebodysobolt holesalignInsertdriveshaft(18)in gerotorinnerrotorsoslotinshaftis alignedwithvalleysinrotorandpush shaftthroughrotorsothataboutV2of thesplinesprotrudeHoldingshaftand rotorinthisposition,insertthemin valvehousingsonotchinshaftengages

centeringpininvalvesleeveandspool Installspacer(19)atendofdriveshaft. Ifspacerdoesnotdropdownflushwith rotor,shaftisnotproperlyengagedwith centeringpin.Installendcapand tightenretainingscrewsequallytoatorqueof20ft.-lbs(27.0N-m)

Ifasourceofhydraulicpowerfor testingisavailable,reliefvalvemaybe checkedasfollows:RefertoFig.8and plug"R"and"L"portsConnecta pressuregageinpressurelinefrom pumpandto"IN"port.Connectaline from"OUT"porttosumpSupportvalve inaviseandturnshaftuntilreliefvalve opens.Reliefvalveshouldopenat 1750-1800psi(11.44-12.43MPa)If reliefpressureisincorrect,removeend plate(2-Fig.9)andadjustreliefvalve untilcorrectreadingisobtained

Ifnobenchtestingisavailablethen adjustasoutlinedinparagraph8.

POWER STEERING CYLINDER

12 R&R AND OVERHAUL. Thoroughlycleancylinderandhosefittingto avoidentryofdirtwhenlinesaredisconnectedAfterhosesaredisconnected removeboltsateachendofcylinderand removecylinderWorkcylinderpiston eachwaytoendofstroketoexpeloil fromcylinder.

13Withcylinderremovedasoutlined inparagraph12,refertoFig10and proceedasfollows:Removeretaining ring(3);thenpushheadtowardpiston endofcylinderandremovesnapring(4) Sliderod,pistonandheadoutof cylindertubeRemovenut(13),piston (10)andhead(7)fromrod.

Inspectinsideofcylindertubeandrod assemblyforexcessscratching,scoring orpittingInspectsealsfornicksand cuts.

Reassemblyisreverseofdisassembly, makingsurethatback-upwasher(8) goestorodendofcylinderandhead(7) isinstalledwithtaperedendtoward pistonendofrodTorquelockingnut (13)to220-250ft.-lbs.(297-337.5N-m).

ENGINE AND COMPONENTS

Model7010tractorusesthe649T enginewhileModel7020tractoruses the6491engineBothenginesareturbochargedwiththe6491enginealsobeing intercooled

Models7030and7040usethe3700 enginewithturbochargerandintercooler

Model7045tractorsusetheturbocharged670Tengine

Models7050and7060usethe3700

enginewithturbochargerandintercooler Model7080tractorisequippedwith the3750enginewithturbocharger,intercoolingandcounterbalancedcrankshaft.

R&R ENGINE ASSEMBLY

14Removalofengineisbestaccomplishedbyremovingradiator,front

support,frontaxleandwheelsassembly.Then,unboltandremoveengineand siderailsfromtransmissionhousingas follows:

Draincoolingsystem,disconnectbatterycablesandremoverightandleft hoodassembliesRemovepanelatfront ofconsole,andremovethetophood assemblyDisconnectradiatorhosesand aircleanerinlethose.Identifyanddisconnectpowersteeringlines,power

Fig. 10-Exploded view of power steering cylinder.

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Fig. 11—On all models except 70i0 and'7020 use sequence shown to tighten short cylinder head bolts. See text for complete outline of cylinder head Installation procedure.

cylinder head and, if injectors are not removed, extreme can) must be taken when removing and handling the cyiinder head

Remove cylinder head retaining cap screws and carefully })ry cylinder head up off dowel pins located at front and rear of cylinder block. Lift cylinder head from tractor

Fig. 12—Use sequence shown when tightening all cylinder head bolts after rocker arm assembly has been Installed on Model 7010 and 7020 tractors. See text for complete outline of cylinder head Installation procedure.

steering oil cooler in front of radiator and transmission cooler lines at bottom of radiator. Unbolt and remove radiator. Drain oil pan if engine is to be disassembled Disconnect all electrical wiring to engine and move to rear.

NOTE: Cap all openings as lines are disconnected

Remove platform panel, step and brace from left side of tractor. Disconnect vent line andfuel return line from top of fuel tank. Shut offuel and disconnect line from main fuel tank (large tank). Remove the cross-over fuel line between main tank (left side) and auxiliary tank (right side) if so equipped. Plug auxiliary fuel line with plastic cap if tractor isso equipped. Loosen main fuel tank support straps attrunnion on inner side oftank. Support tank on floor jack. Disconnect battery wire from fuel level sending unit and disconnect ground wire from bolt onplatform support Remove fuel tank support straps, lower fuel tank to floor and move from under tractor Disconnect speed control cable, fuel shut-off cable and engine hour-meter cable

Support tractor under transmission housing, attach hoist to front support, unbolt front support from side rails and roll complete front assembly forward from tractor

NOTE: If additional clearance is needed for removal of front support from side raiis, ioosen the engine front mounting cap screws

Attach hoist to engine, then unbolt and remove engine and side rails from

Fig. 13—Use sequence shown when performing final cylinder head bolt tightening on all models except 7010 and 7020. See text for complete outline of cylinder head Instaliation procedure.

transmission housing

Reinstall engine and torque limiter clutch assembly by reversing removal procedures Bleed diesel fuel system as outlined in paragraph 44 and, if necessary, bleed power steering system as outlined in paragraph 7

CYLINDER HEAD

15 REMOVE AND REINSTALL. Drain cooling system andremove hood top and side panels Disconnect upper radiator hose from thermostat housing and remove tube from air cleaner to turbocharger Disconnect oil lines and remove turbocharger Disconnect water by-pass tube from water pump and thermostat housing, disconnect temperature gage sender switch wire and remove thermostat housing from cylinder head If soequipped, remove cap screws securing coolant filter bracket to intake manifold allowing coolant filter with hoses intact to hang to one side Remove exhaust and intake manifolds.

Disconnect breather tube from rocker arm cover and remove rocker arm cover Remove oilsupply line to rocker arm assembly and equally loosen and remove rocker arm assembly retaining cap screws. Lift off rocker arm assembly and remove push rods Disconnect and remove the fuel return manifold, disconnect fuel lines from injectors and capall openings to prevent entrance of dirt or dust

NOTE: Although not required for removai of cyiinder head, it is recommended that fuei tnjector assembiies be removed at this time. Injector nozzie tips protrude through the fiat bottom surface of

When reinstalling cylinder head, be sure that gasket sur'aces of cylinder head and block are clean and free of burrs Check cylinder liner standout as outlined in paragraph 31. Place new gasket with side marlced "THIS SIDE DOWN" against cylinder block and be sure gasket is properly located on the two dowel pins

NOTE: Do not apply grease or gasket seaier to gasket sulaces, biock or cyiinder head; new gasKet is treated with phenolic sealer

If applicable locate ire rings around cylinder sleeves then position cylinder head on dowel pins. Lubricate cylinder head retaining cap screws with motor oil and install the 20short cap screws On Models 7010 and 7020 tighten short cap screws evenly from center of cylinder head towards each endto 63-73 ft.-lbs (85.0-98.5 N'm). On all other models tighten the 20 short cap screws to a torque of 90-110 ft-lbs. (L21.9449.1 N-m) in sequence shown in Fig. 11

Install push rods and rocker arm assembly Starting in center and working toward each end, tighten the six long rocker arm shaft/cylinder head retaining cap screws to a torqu<; of 63-73 ft.-lbs, (85.0-98.5 N-m) for Models 7010 and 7020, and 90-110 ft.-lbs (121.9-149.1 N'm) for all other models.

On Models 7010 and 7020 retighten all cylinder head retaining; cap screws to a torque of 150 ft.-lbs ($103.2 N-m) in sequence shown in Fig. 12. For all other models retighten all (ylinder head retaining cap screws to a torque of 165 ft.-lbs. (223.5 N-m) in sequence shown in Fig 13;anadapter must be used to correctly tighten cap screws located under rocker arm shaft

On all models, adjust valve tappet gap cold to 0.018 inch (OAt mm) as outlined in paragraph 21 Install intake manifold and tighten retaining cap screws to 18-21ft.-lbs. (24.3-28.3 N-m). Install exhaust manifold and tighten retaining cap screws to 46 ft.-lbs (&.1.1 N-m)

Start and run engine forapproximately one hour (preferably under aload) until it reaches normal operating temperature of approximately 160°F (71.1°C), then retorqie cylinder head, intake and exhaust mainfold retaining cap screws Readjust v^alve tappet gap hot to 0.015 inch (0.38 mm) After ten hours of normal tractor operation, retor-