TM 9-1777A HEAVY TRACTOR M1, IHC TD-18

8/10/2019 TM 9-1777A HEAVY TRACTOR M1, IHC TD-18

1/322Publ

icDomain,Google-digitized

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RDEPARTMENT

December12,1942

E

D-18)ENGINE(/:

onofthe \ \"~l~lA

.................1-62-27

andtune-up7-22 28-35

einvehicle...23-2436-37

mvehicle.....25-3638-52

...........37-7453-99

bledengine... 75100-104

disassembly,

...76-153105-230

............154-195231-285

vehicle.....196-208286-294

.........209-210295-297

pment........211-214298-302

.......215-216303-304

305-314

PublicDomain,Google-digitized

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ems4

edutiesbyechelons6

edinthismanualare fortheinformation

chargedwiththemaintenanceandrepairof

mationonthedetailedconstructionofthe

ssemblyprocedure,inspection,maintenance

fourTechnicalManualsofthe1000series,of

seinstructionsaresupplementarytothosein

nualspreparedfortheusing arm.

generaldescriptionof theengine,and

ootingandtune-up,inspection,removal,dis-

nstallationoftheengine.Removal,dis-

arts,repairandrebuildingofenginecom-

ystemstreatedinindividualsectionsare

on(sectionVII).Fits andtolerances,special

eferencesarelikewiseincludedinindividual

llinformationonall engineaccessories

describesthecoolingsystem,thefuel

ystem.

formationonthepowertrain,the track

eatsofthe HeavyTractorMl.

formationonallother equipmentof

,3and 4discussedinthis textare

metotimecertainimprovementshavebeen

etheseimprovementsaffecttheservicingof

llbegivencoveringbothoperations.Major


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derheads,injectionpump,injectionnozzles,

rpump,cylinderlinerswithpistons,cam-

eandinterchangeableonenginesofalllots.

wisewhenviewedfromtheradiatorend.

s appliedtothetransmissionthrough

lywheel.

ineserialnumberis stampedonthe

onamilledsurfacenearthetopof thecrank-

madetohavethe engineserialnumbers

erialnumbers.Engineserialnumbersare

1to TDRM2242,inclusive



mbers:

DRM4051

DRM5055

DRM4062

DRM4064

DRM4065

8toTDRM4861, inclusive.

Mltractorsisa four-cycle,fullDiesel

fersfromthegasoline engineprincipallyin

ceandignite thefuel.Figure7illustrates

eselenginegoesthroughand comparesthe

thgasolineengineoperation.

TORSYSTEMS.

Waterforthe coolingsystemispro-

galloncapacitywhichislocatedatthefront

s ofthefin-andflat-tubetypeconstruction,

ankswith sideplates.AdoubleV-typefan

vepulley atthecrankshaft,drivesboththe

hefan-drivepulleyruns onballbearingson

ft.The pumpisdrivenfromthe fanpulley

.Thus thepumpshaftassemblyisrelieved

beltload.Whentheengineis cool,water

ineonlybymeansofthe bypass.Asthe

staticallycontrolledvalvesinthehousing

ntofwatertravelingthrough theradiator.

69,70 and71).Theenginehasa front

onnectedbya watermanifold.Eitherthe


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nentsofCoolingSystem


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emovedindependentlyoftheother.While

ruction,slightmodificationsindesignprevent

heads frombeinginterchangeable.Acylinder

reachhead.Coppergasketrings arelocated

ves.Valveguidesarelocatedintheheads

e,exhaustandstartingvalves,likewiselocated

eplaceable.Theintakemanifoldandthe

eattachedtotherightside ofthecylinderheads.

ecrankcase,whichisthemainstructural

x-like,one-piececastingwhichcontainsthe

ylinderliners.Figure155 showsthecrank-

n.Themain bearingcaps,heldtocrankcase

crankcaseandcannotbereplacedindividually.

ecrankcaseforrubberseal ringstosealthe

ebottomofthecylinderliners.Thecamshaft

ofthecrankcase.

).Cylindersleevescanberemoved

vebeenremoved.Aflangeon thetopofthe

cessin thecrankcase,properlylocatingthe

achsleeveextendsoveritsentirelength.

npinsandrings canbeobtainedinmatched

to thesleevesandshouldneverbeinter-

Themainbearingsare thesteel-backed,

replaceablewithoutremovingthecrank-

psarestamped1,2, 3,etc.,tofacilitate

errespectivepositions,withstampednumber

numberonthesideof thecrankcase.Numbers

eofthe crankcasewheretheoilpanis

ecrankshaftisdrilledfor fullpressure

connectingrodbearings.Crankshaftthrust

the centermain(No.4)bearing.

sboltedtothe endofthecrankshaft

lpins. Oneoftheboltholesis offsetsothat

bledinonlyone position.Thestarterring

heel.

Rods(fig.107).

minumalloyandarefittedwithsix rings.

edoneaboveand onebelowthepistonpin.

relocatedatthetop ofthepistonandone

pperoilcontrolring andthecompressionrings.

efull-floatingtypeandareheldin the

s.An oversizepistonpinisavailableto

epistonandthe connectingrodbushing.


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illed fromtheconnectingrodcrankshaft

oprovidelubricationatthatpoint.The

pisnotfurnishedseparately.Theupperand

tingrodbearingareidentical.Theyare held

gein thenotchesintheconnectingrodand

nTiming(fig.163).Acompletely

gearsis mountedonthefrontendof the

ardrivesanidlergearwhichin turndrives

njectionpumpdrivegear. Thecamshaft

ssoridler gearwhichinturndrivesthe

Thecamshaftandinjectionpumpdrivegears

f thecrankshaft.Thecrankshaft,idler,

mpdrivegearsaremarkedsothat theengine

enoverhaulingit.

camshaftislocatedinthe right-hand

heldinplacebya thrustplateboltedtothe

.Thecamshaftrunsonfour bearings.These

eand neednoreamingafterbeinginstalled

goilpump isdrivenbythe camshaft.

nism(fig.66).Twovalveleversoneach

ustandintakevalves.Thestartingvalveis

ement.Theentirevalveandshaftassemblies

ovedasa unit.Theexhaustandintakevalve

atedthroughapassagefromtherearcamshaft

hollowvalvelever shaft.Theoildrainsback

hepushrod openings.Thevalvelevershave

solineas aconventionalgasolineengine.

perationitisconvertedtothe Dieselcycle

sel.Acompressionreleaselevermountedon

owstheoperatortoconverttheDieselengine

s donesimplybypullingdownonthe com-

umberofthingswhichwill beexplainedinthe

eplacewhenthisconversionismade.

sdown onthecompressionreleaselever

t operatinglever(A)turnsthecross shaft,

haftjawlever(B),engagingit withthe

ratingjaw(T),througha connectingrod,

nkandshiftsthecarburetorshut-offlever(I),

othe carburetorwhenstartingtheengine.At

perationtakesplace,theoperatingjaw(T)

Q)whichactuatesthestartingvalvecross

gvalveoperatingcrossshaft lever(R)

eratingcrossshaft(C) whichoperatesthe


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ftonwhichthe camrollers(L)aremounted.

wn,theyopenthe startingvalves(D)of

cylinder.Openingthestartingvalve(D)

abovethepiston,exposingthesparkplug(J)

his drawninfromthecarburetor(K).

atingcrossshaftlever (R)alsooperates

whichshifts theairvalve(G)from theseat

eair valveupperseat(H).Asthe airvalve

)makescontact,closingtheprimarycircuit

edistributor.(Theignitioncoilandthe dis-

hisillustration.)

tedtogasolinestarting, airfromtheair

sthemanifoldthroughtheair passage(O)

owsthe whitedottedlinedownthrough

asolineismixedwith it.Thegas-airmixture

r passage(P)tothecylindersthroughthe

ston(M) travelsthroughthecompression

sforcedpast thestartingvalve(D)intothe

reitisignited bythesparkplug(J). The

openat alltimeswhiletheengineis oper-

nvertedtoDieseloperationbyliftingthe

ronthedash,theoperatingjaw(T) isshifted

U) shiftsthewholestartingmechanism.

osedandremainsclosedduringthetime

ngontheDieselcycle.Theswitch(F)breaks

eignitioncoil tothedistributorsothat the

perative.Airisdrawnthrough theairpas-

nerandfollowstheblackarrowdirectlyto

nders.

selfuelflowsfromthe supplytank

oughthe watertrapmountedontheleft

uel supplypump.Thefuelsupplypumppumps

fuelfiltermountedonthecrankcase.The

ter tothefrontend oftheinjectionpump.

ectsthefuel throughpipestothenozzles.

njectionpumpthrougha checkvalveat

umpandisreturnedto thefuelsupplytank.

eddescriptionof thefuelsystem.

ectionpumpistometer thefuelin

oadandspeeddemandsandtodeliverit to

eright time.Thefuelinjectionpumpwith

speedtypegovernorisacompactunit

ginespeedfromthe timinggeartrain.This


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tside oftheengineinan accessibleposition

dandreplacedasa completeassembly.

singcontainsoneplunger-typeinjection

er,allplungersbeing operatedinproper

gonball bearingsinthelowerpartof the

f-regulating,piston-typesupplypump

of theinjectionpumphousingandisactu-

camshaft.Thesupplypumpdrawsfuel

underpressurethroughalargedouble

onchambersump,whichrunsthe full

p.Atone endofthesumpis anoverflow

pipingtothefuel tank.Thisvalveissetto

ureintheinjectionpump.

vernoristoserveas ameansforpre-

thincloseregulationanydesiredengine

dlingandnominalmaximumspeedrange.It

ineload.In addition,thegovernorcontrols

preventstallingandcontrolsthemaximum

enclosedunitrigidlymountedtoone

mp.A largegearismountedon theendof

aftwhichextendsintothegovernorhousing

connectedtothegovernorshaft.Through

theshaftis causedtotravelata higherspeed

mshaft.Thecentrifugalforceexertedbythe

amovementofthegovernorsleeveassembly.

dbythecompressionofthegovernorsprings.

ertedbythe governorspringsisregulated

edash.Thegovernorisinternallyconnected

rolrod.

aircleaneris locatedimmediatelyin

centerofthedashand cowlassembly.A

ppreventsflyingleaves,etc.,fromentering

oughtheair pipeassemblyandthebody

embly,whereheavyparticlesofdust and

l cup.Theairthenpassesupwardthrough

mbly,thehousedscreenandthe cleaning

retheoil-impregnatedelementremoves

mthe air.Theaircontinuesthroughthe

ntair cleanerpipetotheintakemanifold

anerwillbeservicedbytheusing arm

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ewhichin turnisdrivenby thegeartrain

Thecrankshaftgeardrivesanidlergear

tgear.Thecamshaftgeardrivestheair com-

turndrivestheaircompressordrivegear.

haftandthe aircompressorcouplingflange

ubbercouplingand acouplingcover.Should

essary,theair compressordrivecanbe

whiletheengineis installedinthevehicle.

-voltstoragebatteries,locatedunder

seriesto maintainthevoltageoftheelectrical

teriesare chargedbya12-voltDelco-Remy

dontherightside oftheengineblockand

entheengineisrunning.Thegenerator

toplights,headlights,andblackoutlights;

rankingmotorandthe ignitionsystem(used

-1777Bfor detaileddescriptionsofthe

calandstarting(ignition)systems.

em(fig.10).

dwithafullpressurelubricatingsystem.

nkcasedelivertheoil tothebearingsand

lubricated.Noexternallinesareusedexcept

lpressuregage mountedonthedash.

bricatingoilfor themainlubricating

pump(O) fromtherearofthe crankcase

P) fromthefrontofthe crankcasedeliver

ractorisoperatingat extremeanglesoftilt.

mp(N) receivesthisoilthroughafloat (R)

thesurfaceoftheoil levelinthecrankcase

throughtheoilpassage(D) fromlubricating

(C)inthe crankcase.

)mountedin thebodyofthelubri-

esthe pressureandbypassesthesurplus

s.Partof theoilfromthe oilheader(C)in

ubricatingoilfilter (E).Aftertheoilis

tingoilfilter (E),itisreturned directlyto

ypartofthe oilthatis pumpedbythelubri-

ubricatedthroughoil passages(A)

hecrankcasetothemainbearings.Oil

ages(L)in thecrankshafttotheconnecting

sare lubricatedthroughtheoilpassages

dbearingstothe pistonpins.

arelubricatedthroughtheoil passages

header(C)tothemainbearing andcam-

camshaftbearingjournal(B)thereisa slot


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switheachrevolutionofthecamshaft

othe-camshaftandmainbearingstothe

sup throughtheoilpassage(I) fromthe

hevalveleverassemblyto theoilpassage

bricatedthroughtheoilpassage(K)to

alTD-18

691

62

nkendClockwise

1,350

fullloadrpm1,350

noload,"A"seriesrpm1,465

noload,"K"seriesrpm1,500

1,350rpm103*

at650rpm

el14.2to1

line6.7to1

"(updraft)

co-Remy

ettype

ENANCEDUTIESBYECHELONS.

dwordsasusedin thislistofmainte-

nedasfollows:

neorganizationregiments,battalions,com-

helons).

ancelightmaintenancecompanies,ord-

ncecompanies,ordnancedivisionalmaintenance

ceshops.

rdnanceheavymaintenancecompanies

ops.

ometricpressure(29.92in.ofmercury)and60 F,

ngcode.


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ancebaseregiments,ordnancebases,

ers'plants.

ventivemaintenance)(par.23a.(1)

1942):Consistsofservicing,cleaning,lubri-

dnutsandmakingexternaladjustmentsof

iesandcontrol.

AR850-15.Oct.6, 1942):Consistsof

emblyorassemblyfromthevehiclesandre-

conditionedorrebuiltpart,subassemblyor

casemaybe.

and(5)inpart. AR850-15):Consists

acementof,thepart, subassemblyor

omplishedwithoutcompletelydisassembling

blies,anddoesnotrequireheavy.welding,or

gand/orbalancing.

in partand(6)AR850-15):Consists

ingandreplacinginserviceableconditionany

semblyorassemblyofthevehicle,including

ng,fitting,alining,balancing,assemblingand

BLY

adjust)X

EX

X

(recondition)E

aceX

irX

eviceandreplaceX

ace.'....X

irX

ildEX

S

replaceEX

repairX

rebuildEX

aceX

airX

uild(recondition)EX

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eorreplaceX

g,electricalreplaceX

ricalrepairEX

eplaceX

(inserts)replaceEEX

erts)replaceEEX

service(adjust)andreplaceX

sassemblyrebuild(recon-

t)andreplaceX

eplaceX

laceX

airX

ondition)EX

blyreplaceX

pairX

buildX

ce* X

X

dEX

ndreplaceX

n)andreplaceX

)andreplaceX

aceX

ud(recondition)EX

manifoldandoilpanreplaceX

aceX

viceandreplace^... X

pair~...X

page27.


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buildX

vice(adjust),replaceorrepairX

uildEX

replaceX

repairX

rebuildEX

ceX

rX

dEX

(external)replaceX

(external)repairEX

(internal)replaceorrepairX

ke,assembliesreplace....X

ke,assembliesrepair....X

ke,assembliesrebuild(re-

replaceX

repairX

rebuildX

ce(clean)andreplaceX

rX

eEEX

an)andreplaceX

repairX

replaceX

erviceandreplaceX

pairX

buildX

aceEX

airX

uildX

serviceandreplaceX

repairX

rebuildX

lyreplaceEEX

EE X

(adjust)X

X

eX

page27.


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dioxideCO.,)replace...X

dioxideCO2) service

dioxideCO2) rebuild....EX

tetrachlorideCCl.^)

X

tetrachlorideCC14)

tetrachlorideCC14)

esreplaceX

tsreplaceX

tsrepairX

tsrebuildEX

ts,truckframereplaceX

ts,truckframerepairX

eplaceX

epairX

ebuildEX

ngservice(adjust)

ngrepairX

ngrebuildEX

mbliesreplaceX

mbliesrepairX

mbliesrebuildEX

yreplaceX

yrepairX

yrebuildEX

ceorrepair. ...X

dEX

replaceX

repairX

rebuildEX

s,airservice(clean)

s,airrepairX

elservice(clean)

page27.


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)

elrepairEX

ervice(clean)

epairX

AMEASSEMBLY

tchservice(adjust)

tchrepair(reline)X

emblyreplaceX

emblyrepairX

emblyrebuildX

ereplaceX

erepairX

esservice(adjust)X

esreplaceorrepairX

esrebuildEX

rnal)replaceX

rnal)repairX

nal)replaceorrepair....X

aceX

airX

ervice(adjust)

eX

X

aceX

irX

eX

X

d,EX

X

sreplaceorrepairX

srebuildEX

ES

eplaceX

epairX

ebuildEX

eplaceX

epairX

ebuildEX

page27.


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ES(Continued)

paceX

pirX

bildEX

olreplaceX

olrepairX

bliesreplaceX

bliesrepairX

X

t,assemblyreplaceX

t,assemblyrepairX

ceX

rX

IHC)-serviceX

IHC)-rebuild(with

E

RAKE-CONTROL,AIR

yserviceandreplaceX

yrepairX

yrebuildEX

laceX

airX

semblyservice(adjust)

semblyrepairX

semblyrebuildEX

replaceorrepairX

aceX

airX

esreplaceX

esrepairX

esrebuild(recondition)...EX

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C

mblyreplaceX

mblyrepairX

mblyrebuildX

assemblyreplaceX

assemblyrepairX

replaceX

repairX

X

vice(adjust)andreplaceX

air(reline)X

placeX

replaceX

repairX

ceX

rX

laceX

airX

aceX

airX

replace.-X

repairX

rebuild(recondition)EX

X

X

EX

tedwillnormallybeperformedintheechelonindi-

eechelonsasindicatedby"E"maybeaccomplished

sinemergenciesonly.

thorizedtoremoveandreinstallengineand transmission

controlleddifferentialassemblyandotheritemsmarked

enitisnecessarytoreplacean itemmarkedbyanasterisk

subassemblyorunitassembly,theassemblymarkedby

dfromthe vehiclebythesecondechelonuntil

romahigherechelon.


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NGANDTUNE-UP

tarting(gasolinecycle)9

solinecycle)10

eseloperation11

or morecylinders12

operation14

rly(Diesel) 21

cedureoutlinedinthis sectioncovers

tem,coolingsystem,fuelsystemandelectrical

hparagraphinthissectiontreats acondition

iblecausesandnecessarycorrectivemeas-

inesenginetune-upprocedure.

cedureoutlinedinthis sectionshould

telyassembledtractor,beforeanypartshave

hicleortheengine.

DHARDSTARTING(GASOLINE

termineifthereissufficientgasolinein

ndsa shortdistanceupinsidethegasoline

sarythattherebesufficientfuelin thetank

e.


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NGANDTUNE-UP

HINGCARBURETOR.Removegasoline

vegasolinelineandclean.Removescreen

system,TM9-1777B)andclean.

Drainfuelandwatermixturefrom

estrainer.Draincarburetorfuelbowlby

fbowl.Fill gasolinetankwithgasoline.

ecktiming(electricalsystem,TM

NG.Seeifcarburetorfloatvalveisshutting

roubleisgasolinedrippingfrom thedrip

veseatorwornvalveseat willcauseflood-

assemblydisconnectfuellineatthe carbu-

assemblyandcheckasoutlinedinfuelsystem

H.Checkfloatlevelandadjustasout-

,TM9-1777B.

OKEDTOOMUCH.Removesparkplugs,

rythem.

TIONING.Removecoveronintakemani-

ompressionreleaselevertocheckoperation

maryCircuit.

TDUETOLOOSECONNECTIONS,DEFEC-

NTACTPOINTS,DEFECTIVEIGNITIONSWITCH

DPARTLYOPENIGNITIONCOILPRIMARY

amgiveninTM 9-777andcheckthecir-

nitioncoilswitchandignitioncoilif

CRCUITEDLowINSULATIONRESISTANCE,

E.Replacecondenser.

IES.Installfullychargedbatteries.

CIRCUITANDCOILWIRINGORDIS-

ckthewiringcircuitforgroundedcondition.

WITCH.Checkswitchforbrokencon-

ary.

aryCircuit.

IONWIRING.Checkwiringforbroken

IONSINHIGHTENSIONCIRCUIT.Check

heyare tightandclean.

OROUTSIDEOFDISTRIBUTORCAP.Re-

leancloth.

D,CRACKEDOROUTOFADJUSTMENT.

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GEACROSSCOILHEAD,DISTRIBUTOR

LUGPORCELAIN.Cleanallpointswhereleak-

OIL.Checkcoilforshortedprimaryor

enorgroundedsecondarycoil.

RING(GASOLINECYCLE).

graph42.

Draingasolineandwatermixturefrom

ine.

Manifold.Tightenmanifoldstudnuts.

emovedistributorcapanddry it.

hecksparkplugcablesforcorrect

ndat distributor.

OVERTODIESELOPERATION.

tDeliverFuel.

TANKSHUT-OFFVALVECLOSED.Refill

esure valveisopen.

AIRBOUND.Bleedsystem.SeeTM

ULED,DAMAGEDORLEAKING.Clean

eplacedamagedlines.Tightenallconnections.

.Drainentiresystemand tankandrefill

msystem.

GED.Removefilterandthoroughlyclean.

CLOGGED.Removewatertrap,glass

PUMP.Openventcocksonthewater

nnozzlesto bleedairfromsystem.

ESNOTDELIVERFUEL.Removesupply

utlinedin fuelsystemsection,TM9-1777B.

OGOVERNORLEVERLOOSEORBROKEN.

ryrepairs.

PBROKENORKEYONSHAFTSHEARED

mpshaftwillturn whenengineisstopped.

nismNotFunctioning.

LDNOTFUNCTIONING.Removehousing

controlmechanismtoseeifair valveis

TCLOSING.Removevalvehousingcover

tartingvalves.Checkclearancebetweencam


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NGANDTUNE-UP

LINKAGEBROKENOROUTOFADJUSTMENT.

parts,missingcotterkeysandpins.Check

aragraph186.

ARPED.Removecylinderheadsandreplace

ONONEORMORECYLINDERS.

UENTLY.

h14fortroubleshooting.

UNEVENOPERATION.

usesOutlinedinParagraph11.

YORSTICKING.Removedeliveryvalves,

n fuelsystemsection,TM9-1777B.

NGBROKEN.Replacesprings(TM

NGINE.Cleanairintakecapscreenand

leanerisclean.Cleanoil cupandrefillwith

).

GRAPH10TODETERMINELossOFPOWER.

BROKEN.Replacespringsasoutlinedin

ING.SeeTM9-1777C.

GRETARDED.SeeTM9-1777B.

GINE.Seeparagraph18.

E.

theoil levelisupto specifiedmarkon

eandLine.Removeoilgageand re-

curacytobesurethe oilgageisfunctioning.

tingRodBearingsforExcessiveWear.

bearingwearasoutlinedin paragraphs98,

e.Removelubricatingoilpumpand

101).

gulatingValveSpringBrokenor

utlinedinparagraph102and check.Replace

ecttension.

oilpumpanddisassembleas outlined

kforwear.


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nExcessively.Removecamshaftfrom

llnewbearings.See paragraph158.

ON.

.Valveleversholdvalvesopenslightly,

sion.Ifsettingclearance(par.193)doesnot

dvalves.

dcarbononvalvestemsandin valve

fromclosingproperly.Removecylinderheads.

ms(par.80).Grind orlapvalvesif necessary.

PistonRingsandStickingPiston

embliesandcheckwearon,pistons,piston

estickingrings.Replacewornsleeves.

orinNeedof Grinding.Remove

raph79.Replacewarpedvalvesandvalves

heretheycanbe ground.Seeparagraph85.

.Removecylinderheadsandreplace

Usefuel asspecifiedinTM9-777.

tlyTimedtoEngine.Checktiming

nctioningProperly.

properly adjustedororificeinnozzle

venozzleandtestas outlinedinTM9-1777B.

AKS.Removeandtestfor leakingasout-

RodStopPlateAdjustmentIncorrect.

tadjustment.

olingSystem.Checkwaterleveland

AUTION:Donotputcoldwaterin ahot

engine isrunning.

ktensiononfanbelt andadjustas

section,TM9-1777B.

d.Flushoutradiatorandengine.

deofRadiator.Cleanalldirtand

diatortubefins withairorwaterpressure.

netimingis advancedexcessively',

tlinedinTM 9-1777B.

e.Removeandtestthermostatsasout-

tion,TM9-1777B.


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NGANDTUNE-UP

Filloilpan withtherequiredamount

gshavenotbeenburnedor thecylinderscored

ON.

an.

dbracket.

arendsof crankshaft.Ifoilsealatrear

befoundin clutchcompartment.

seatendofcamshaft.Ifthisplugleaks,

owntherearsupportplateof theengine.

ves,PistonsandStickyPistonRings.

fromthebreatherpipeontheside ofthe

nexcessiveamountofoilisbeingused.Check

ndreplaceif necessary.Oilcontrolrings

essivewearintheintakeandexhaust

hoil consumption.Checkforwearbetween

msandreplaceif necessary.

FENGINE.

istedinparagraph11.

Low.Checkthermostats.Remove

coolingsystemsection,TM9-1777B.

.Seeelectricalsystemsection,TM

EPROPERLY(DIESEL).

y,SluggishorStuck.Removegovernor

ntrolrod.

Replaceplungerspring(TM9-1777B).

ndedinBarrel.Removeandfree

9-1777B.

SleeveDamagedDuetoBroken

onorreplacesleeveasoutlinedinTM

veryValves.Removedeliveryvalves,

edin TM9-1777B.


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E

D-18)ENGINE

ingScrewLoose.Alinemarkontoothed

trolsleeveandtightenscrewsecurely.See

netheoperationswhichshouldbe

-up.Thesestepspointout thevariousparts

ed,cleaned,timedorrepaired,as needed.

umpfromtheengine,placeit oninjec-

alibrationtestonthepump.Test thefuel

TM 9-1777B.

injectionpump(TM9-1777B).

injectionnozzlesforleaksandopening

rasoutlinedin TM9-1777B.

cersandinspectforpitted orburned

etsandreplacespacersifnecessary.SeeTM

FDIESELTHROTTLECONTROL.Adjust

y.Checktheoperationofthe springsonthe

TM9-1777B.

nceonintake,exhaustandstartingvalves.

nedinparagraph186.

heaircleanerandconnectionsforpos-

semblyon aircleanerandscreenonair

catingoilfilterelements,cleaningtheoil

ughly.Cleanandinspectthemetalandcloth

eplacethecloth elementiftorn.SeeTM

ewatertrap.Cleanthoroughlyandinspect

M9-1777B.

ARKPLUGS.Replacebrokenplugs.See

.Cleanandadjustdistributorpoints.See

NITIONCOIL.Checkcondenserandreplace

oncoil,replacingifnecessary.SeeTM9-1777B.

TIONS.Checkallelectricalconnections

ndlowtensioncircuitsofthe ignitionsystem.

SOLINECYCLE.Seeelectricalsystem


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NGANDTUNE-UP

ONTROLANDLINKAGE.Checktheentire

em.Seeparagraph186.Checkstartingvalve

186.

vethescreenretainerandcleanit.Remove

evel.Adjustif necessary.Checkthefloat

e.SeeTM9-1777B.

ushradiatorwithcleanwater,drainand

ilable.Checkwaterpumppacking,adjust

ackingas needed.Checkthefanbeltsfor

ary.Checkfanbelttension.Seecooling

7B.


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CE

O-18)ENGINE

NEINVEHICLE

neinthevehicle24

NS.

veninTM 9-777forthefollowinginspec-

TION.

.Procedureisoutlinedforinspections

400hoursofoperation.

LLEDENGINEINTHEVEHICLE.

leOperatingonGasolineCycle.

onsperminutewithatachometerplacedon

.Seeparagraph14ifrevolutionsperminute

leOperatingonDieselCycle.Change

ionand allowittooperatefor fourorfive

ree-quarteropenthrottle.

NS.Listenforanyunusualnoises,such

heengine.Thismayindicatethata connecting

burnedout.Piston slapalsoproducesasimilar

utlinedinparagraph16andchecktolocate

kingnoiseindicatesthat thepistonpins

heconnectingrodbushingsandpistons.Re-

outlinedinparagraph107and inspectforwear.

oiseatthefront oftheengineindicates

wornexcessively.Removefrontcrankcase

aphs131and 132andinspectforwear.

ngnoiseindicatesinadequatelubrication

eneratorbearingsandbushingsforwearas

oilpressureatfullthrottle.If low,see

dicatorneedleshouldbein whiteareawhen


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39/322

NEINVEHICLE

ationofthemotorindicatesstickingvalves.

rear cylinderheads,orboth,asindicated

linderheadasoutlinedin paragraphs78,79,

see thattheyarenotsticking.

Whitesmokeattheexhaustwhenengine

gunderload indicatesthatthenozzleis

owopeningpressure.Openbleedervalvesone

ozzlestolocatethedefectivenozzle.

achometertocheckthemaximumand

ttheyconformwithspecifications.

Observetensiononthethrottlecontrol

holdthe throttleleverinpositionselected.

kforexcessivesmokeattheoutletofthe

andrear sideofthecrankcase.Excessive

ngs,pistonsandsleevesare wornorpiston

ongrooves,orthatopeningsinoil controlrings

onassembliesasoutlinedinparagraph107

veontheammeterthechargingratewhen

highandlowpositions.If thegeneratoris

pecified,seeTM9-1777B.

rviceandblackoutswitchinallpositions

efunctioning.Replaceanyburned-outbulbs.

ckoutstoplights.


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E

D-18)ENGINE

OMVEHICLE

engine30

31

movalwithengine32

emoval33

tion?34

e35

portandplacingofengine36

ovedfromthe vehicle,anadequatesup-

othe enginecanbereadilyworkedupon.An

supportcanbebuiltasoutlined inparagraph

re removedassembliesundercovershould

ONS.

movedfromthe tractorexceptforcom-

sor replacementswhichcannotbemade

din thevehicle.

Diesel fueltanksisclosed.

estrainer isshutoff.

emis drainedbeforeremovingradiator.

n,TM9-1777B.

efrombatteries.Batteriesarelocated

beforeremoval.Itisimportantthat the

andalldirtremovedfromall exteriorparts

eengineisremovedfromthetractor.This not

perationsbutpreventsdirtfromcomingin

ingsubsequentoperations.

movalofwinchasoutlinedin TM


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41/322

OMVEHICLE

m.

ndcapscrewwhichholdmufflerclamp

fmuffler.Removesecondmufflerinsame

moval

AL(fig.11).

open-end,s/8-in.

n.

LLERCAP.Fillercapis locatedatleft

beremovedbyhand.

SFROMTopOFHOODSHEET.

n.

w.Therearefourcapscrewsatrear of

nt.Eachcapscrewhasflatwasherandlock


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E

TD-18)ENGINE


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43/322

OMVEHICLE

OTTEDSCREWS.

open-end,s/s-in.

rews,lockwashersandnutswhichsecure

ners.

ORFROMENGINE.

edincoolingsystemsection,TM9-1777B.

REMOVAL(fig.12).

,l5/16-in.,

dle

GUARDONJACK.

owerisavailabletolowercrankcase

rankcaseguardonjacksothat guardwillnot

ts areremoved.

DLOCKWASHERSFROMEACHSIDEOF

,l5/16-in.,

ut bolts.

UARD.Lowerjacksothatcrankcase

orfloor.

dbecarefultobe outofwaywhen

L(fig.95).

NCH,box,^-in.

magneticdrainplugs.

UTCHFORREMOVALWITH

heengine,the engineisremovedwith

d.Theclutchisthenremovedfromtheengine.

RINGFROMTRANSMISSIONFLANGE.Fol-

chprocedureinTM9-177 7C,untilclutch

ransmissionflange.


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E

TO-18)ENGINE


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OMVEHICLE

FT.

dlockwasherwhichhold theclutch

ft.Thenremovethe clutchlever.Removethe

ofthe shaft.

GINEFORREMOVAL.

nd,%6-in.

open-end,5^-in.

RENCH,open-end,"/^-in.

m.WRENCH,open-end,^-in.

G-in.WRENCH,ratchet,with

n.socket

SWHICHSECUREDASHANDCOWL

NDERHEAD.

m.

sandlockwashersfromdriver'sside

y.Thenremovespacerbetweendashand

OIR.SeeTM9-1777D.

CONTROLRODFROMBELLCRANKAT

iftrod fromtopholeofbell crank.Push

GRODFROMBELLCRANKATREAROF

3).

thenremoverod frombellcrank.Push

NGSWITCHTOSTARTINGMOTORCABLE

ig.13).

m.WRENCH,ratchet,reversible,

asherwhichholdcableto starter.Re-

washerwhichholdcableclipandcranking

ort.

COILTOIGNITIONSWITCH)(fig.13).

n.

asherwhichholdcableto coil.


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46/322

E

D-18)ENGINE

MPRESSORTOGOVERNOR)(fig.13).

n.

eachendoftube.Thenremovetube.

LEANERPIPE(fig.13).

6-in.WRENCH,open-end,%6-in.

seclip.Removefourcapscrewsandlock

etointakemanifoldhousing.Removepipe

CABLE(AMMETERTOVOLTAGESHIELD,

RACER)REGULATOR-BLACKANDREDTRACER),HEAT

gCablesfromGenerator

SERVICESWITCHTOGENERATOR)FROM

open-end,%6-in.

leybrace.Pushgeneratortowardengine

nd thenremovefanbeltsfromidlerpulley.

bleswithoutremovingheatshield,pull

ne.Removenutholdingserviceswitchto

cer).Removeammetertovoltageregulator

ckandredtracer).

removecable.


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OMVEHICLE

/PIPE,FUEL

UELSUPPLY

nsorLeftRearofEngine


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48/322

E

D-18)ENGINE

ATORPLUGFROMREARCYLINDERHEAD

n.

enremoveplug.

RESSIONRELEASERODFROMCROSSSHAFT

5).

rodfromlever andmoverodupward,

N

SCREW,CAP"* >13779

welBoltfromRearEngineSupport

CONTROLROD(fig.15).

chholdsrodto governorcontrollever.

vecotterpinfrompinwhichholdsadjusting

orcontrollever.Thenremoverod.

CATINGOILINDICATORPIPE(fig.15).

.WRENCH,open-end,%-in.

eachendofpipe.Removecapscrewand

pecliptocrankcase.


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49/322

MVEHICLE

NPIPE(fig.15).

eachendof pipe.

YPIPE(fig.15).

n.

eachendof pipe.

CONNECTION,

%-in.,

R-in.withspinnertypehandle

arEngineSupportCap

ngine

NGINESUPPORTFROMMAINFRAMESIDE

in.WRENCH,socket,T/8-in.,

sed),nut andlockwasherfromeach

t.Holdnuts withopen-endwrenchwhile

twrench.

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D-18)ENGINE

NT

0

eSlingonLeftSide ofEngine

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OMVEHICLE

PULLEY,FANDRIVE

eSlingonRightSide ofEngine

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D-18)ENGINE

GINESUPPORTFROMMAINFRAME(figs.

%-m.,

tswhichlineup engineandclutchwith

ssideofdashandcowlassembly,removenut

elboltin leftsideofrearengine support.

ebolt,lockwasherand nutfromcorrespond-

frearenginesupport.This boltalsoholds

ltprevioustoTDR-3752dowelpinswere

s foraliningtheengineto themainframe.

AMERAPD1Z782

nginefromVehicle

enuton dowelpinandtightenasfar asit

acewashersunderit andagaintightennut.

welpinhasbeenremoved.

wsandlockwashersfromrearengine

screwsmustberemovedfromdriver's side

y(fig.17).

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OMVEHICLE

edonBlocks

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D-18)ENGINE

VEHICLE.

size,

ENGINE(figs.18and19).

g

Frontloop ofropeshouldbeplaced

tto frontenginesupport,withloopinfront

d Dieselfueloilfilter onleftsideofengine.

nt loopshouldrunbetweenidlerpulleyand

ouldbeplacedbackofNo. 6nozzleonleft

oilpan,nexttorear enginesupport.Onright

ould bebackofrearexhaustmanifold.Tie

e inpositionsothatweightof engine

TION:Ropeshouldbeattachedtohoistno

p ofengine.

0).

weightofengineis offmainframeside

lcompleteclutchclearsmainframe.

yfrom vehicle,placingengineonblocks

6.

GINESUPPORTANDPLACINGOF

in.BLOCKS,wooden,2x4x12 in.

nona 2by4by 12-inchwoodenblock

eavyblockoruponequivalentbaseofplanks.

rton heavyblockoruponequivalentbase

ertsmallblocksunderoilpanflanges at

erJo.keepenginewith accessoriesinarigid

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removal39

dwithcarburetorattached40

1

l42

kplugremoval44

removal46

7

val48

elfilter removal50

ateroutletremoval52

val53

ywithvibrationdamperattached....54

oval55

56

7

ontrolremoval59

l60

val61

removal62

3

val64

ngremoval65

mblyremoval66

emoval68

oval70

spartsfromsidesofcrankcase71

al72

al73

4

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D-18)ENGINE

shouldbeavailablefor thedisassembly

edpartsmustbeprotectedfromthe elements

ybecoveredandprotectedfromdust and

ovedfromthe tractorandsupportedon

dinsectionIV.

altoolslistedinsectionXI,a complete

dbe available.Allthetoolsneededforeach

atthe beginningofeachparagraph.The

hparagrapharelikewiselistedatthebeginning

ssarytomovetheengineto thevariousposi-

time intheprocessofdisassembly.

ONS.

yofenginesubassembliesandsubsequent

derlinessandcleanlinessshouldbemain-

eengine.

embletheengine,it shouldbecarefully

rt,oilorother accumulationshavebeen

removalofenginefromtractor,sectionIV,

theenginebe thoroughlysteam-cleaned

xtremecareto protectinteriorofassemblies

ovedfromtheengine.

hnewones.Alltracesof oldgasketsshould

sketsareinstalled.

atedto removeallpartshavingatight

ould notbepriedoffwith screwdriversor

cted.

ersmoothworkingsurfaceswithcare,

orpossiblescoring.

edvalves,pistonsand connectingrods.

mallpartsin receptacles.Tosimplify

embledpartsinorder.

RCLEANERREMOVAL(fig.22).

open-end,^-in.

ANERFROMINTAKEMANIFOLD.

.

sandlockwasherswhichsecureair

manifold.

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D-18)ENGINE

PRESSORAIRCLEANERFROMAIRCOM-

clampofair compressorinletpipelower

efromair compressorairinletelbowand

inlet pipeandtwohosesattached.NOTE:

mpressoraircleanerisfasteneddirectlyto

oslottedscrews.Usea screwdrivertoremove.

MANIFOLDWITHCARBURETOR

l3/1G-in.,

.withspeeder

.

VECONTROLROD(fig.136).

mpinwhichconnectsairvalvecontrol

ollever.Removepinand removerodfrom

ASSEMBLYFROMIGNITIONCUT-OUTSWITCH

g.136).

n.

rewsandlockwashersfromcoveratfront

emovecoverandgasket.

tswitchtodistributor)andcable(coil

enut,lockwasherandflatwasherwhich

tchterminalwithinhousing.Pull cablesout

NEPIPEFROMCARBURETOR(fig.22).

n.

utwhichholdsgasolinepipetocarburetor.

RETORCONTROLRODFROMCARBURETOR

chholdscontrolrodto leveratcar-

FOLD(fig.22).

n.,withspeeder

chholdintakemanifoldtocylinderhead.

hendofmanifoldandfourat center.Liftoff

ttached.Removethreegaskets.

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SCREW.CAPMOTOR,CRANKING

orRemoval

EMOVAL(fig.23).

NCH,socket,9/16-m.,

IPE(fig.22).

ndspeeder

sandlockwasherswhichholdbreather

vepipeandgasket.

OTORANDCRANKINGMOTORCABLECLIP.

wsandlockwasherswhichholdcrank-

upport.Liftoffcrankingmotor.

REMOVAL.

n.,andspeeder

STMANIFOLD(fig.22).

ndspeeder

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D-18)ENGINE

hsecurerearexhaustmanifoldto

anifoldandtwocoppergaskets.

AUSTMANIFOLD(fig.22).

n..andspeeder

eoutlinedinstep(1) above.

TAGNUTCOIL,GNITION

moval

VAL(fig.24).

m.WRENCH,open-end,%6-in.

DISTRIBUTORCABLEASSEMBLYFROM

fromcoil.

NCOILTOCUT-OUTSWITCHCABLEFROM

m.

scabletocoil terminal(+).Aftercable

elockwasherandnutonterminal.Also,

dof cabletofacilitatecorrectinstallation.

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D-18)ENGINE

LWITHBRACKETFROMCRANKCASE.

6-in.

sandlockwasherswhichsecureignition

Thenremovecoilwithbracketattached.

NDSPARKPLUGREMOVAL

n.WRENCH,sparkplug(IHC

o.32941-Dorequivalent)

CABLES.

n.WRENCH,socket,%6-in.,

xsparkplugs,turningcableterminal

counterclockwisedirection.Replacenutson

veruseplierstoremoveortighten spark

ugporcelainmaybecomebroken.

o.1and No.2sparkplugcablesto

screwandlockwasher.

scable(ignitioncut-outswitchtodis-

movecablefromdistributor.

esandignitioncoilcablefromdis-

S(fig.25).

No.32941-Dorequivalent)

wrenchto loosensixsparkplugs,asout-

ection,TM9-1777B.

VAL(fig.25).

box,%6-in.

WHICHSECURESDISTRIBUTORBRACKET

,box,9/16-in.

ngnut.Thenusescrewdrivertoloosen

fromdistributorbracket.

R.Liftdistributor,withbracketattached,

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ERATORREMOVAL(fig.25).

ENCH,socket,%6-in.,

.WRENCH,socket,34-in.,

PE.

ndspeeder

lockwasherwhichsecureheatshield

nkcase.Removegasolinepipe.

LET,

SSORAIRCOMPRESSORCONNECTOR

SCREW,

AP

sorRemove/

.

.WRENCH,socket,3^-in.,

lockwasherwhichholdidlerpulley

lockwasherwhichholdheatshieldand

Removeheatshield.

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TO-18)ENGINE

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n.WRENCH,socket,3/4-in.,

n.andspeeder

ckwasherwhichholdidler bracket

Holdnutwithopen-endwrenchandremove

ckwasherwhichholdgeneratorat

racket.Holdnutwith open-endwrenchand

open-endwrench.Liftoutgenerator,idler

MOVAL(fig.26).

-in.WRENCH,socket,%-in.,

speeder

m.

SSORWATERINLETTUBE.

.


SSOROUTLETTUBE.

.


SSORDRIVECOUPLINGCOVER.

n.

washersandlockwasherswhichhold

ngoncouplingflangegearanddriveshaft

SSORWITHBRACKETATTACHED.

wsandlockwasherswhichholdair com-

ase.Liftaircompressorwithbracketattached

eaircompressorbracketgasket.

REMOVAL(fig.27).

nd,s/8-m.

open-end,^-in.

n.

NJECTIONPUMPTONOZZLES).

n.WRENCH,open-end,3/4-'m.

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D-18)ENGINE

dNo.1and No.6pipesto cylinder

sateachendofsixpipes.RemoveNo.1

4,5and 6insequence.

veholderwithcaporwith tapeassoon

portantthatholdersbe coveredsothat

ctionpump.

ELFILTERTOINJECTIONPUMP).

m.

eachendofpipe.

ELSUPPLYPUMPTOFUELFILTER).

m.

eachendofpipe.

ATERTRAPTOFUELSUPPLYPUMP).

m

eachendofpipe.

NORCONTROLRODFROMGOVERNOROPER-

enremovepinandcontrolrod from

SPACER.

coversspacerbetweenadjusterand

ONPUMP.

.

wsandlockwasherswhichholdfuelinjec-

kcase.Thenliftoffpumpand bracket

AL(fig.27).

ndspeeder

ocapscrewsandlockwasherswhich

crankcase.Liftoffwatertrapwith bracket

TERSANDFUELFILTER

ndspinnertypehandle

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rcapscrewsandlockwasherswhichhold

ftofffilterbase withfiltersattached.Then

AL(fig.27).

NCH,open-end,7/16-in.

capscrews.

R.

6-in.

ousingandWaterOutletRemoval

sandlockwasherswhichsecurehour

ear housing.Thenremovehourmeterand

RDRIVENGEARASSEMBLY.Liftassembly

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D-18)ENGINE

NGANDWATEROUTLETREMOVAL

box,^-in.

OUTLETHOSEFROMWATERPUMP.

mp.

AHOUSINGANDWATEROUTLET.

wsandlockwasherswhichholdwater

movehousingwithwateroutletattached.

gasket.

PREMOVAL(fig.28).

PUMPFROMCRANKCASE.

ngcapscrewsandlockwasherswhich

rankcase.Thenremovewaterpumpand

PBODYGASKETANDTwoWATERPUMP

VEPULLEYWITHVIBRATION

ket,2%-in.,and

bspinnertypehandle

UT.

ket,2}i-in.,

spinnertypehandle

ginefromturning overwhenstarting

ovestartingnutin samemannershownin

artingnutlockwasher.

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ULLEYWITHVIBRATIONDAMPER

b

dvibrationdamperfromcrankshaft.

ORTREMOVAL.

bWRENCH,open-end,7/16-in.

OMCRANKCASEFRONTCOVER.

b

port.

blyRemoval

6-in.

mfrontenginesupport.

MOVAL(fig.29).

ndspinnertypehandle

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D-18)ENGINE

BACKPLATEFROMFLYWHEEL.

andspinnertypehandle

wsandlockwasherswhichholdclutch

LUTCH.Liftcompleteclutchfromflywheel.

eelRemoval

MOVAL(fig.30).

nd

nd

OCKS.

cksfromheadsofcapscrews.These

insin place.

SWHICHSECUREFLYWHEELTOCRANK-

nd

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don outsideofflywheel,tokeepfly-

apscrewsarebeingremoved.Removesix

vethreecapscrewlocks.

eelfromCrankshaft

WITHRINGGEARATTACHED.

%-in.,and

crewsintopuller holes.Thentighten

eachoneaquarterturn atatime,untilfly-

shaft.CAUTION:Becauseofweightof

usedto liftitawayfromengine.Otherwise,

kenwhenliftingtheflywheelby hand.

OVAL,

.

and

nd

SINGCOVER(fig.63).

.

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TD-18)ENGINE

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opperwasherswhichholdcoverto

er;removegasketandfelt.

SHAFTOPERATINGRODFROMCROSSSHAFT

mpinwhichholdsadjusting yoketo

pin.

TSPRING(fig.32).

onnectsinnerlevertospringanchor

RSHAFTBRACKETSTUDNUTS(fig.32).

.

centerstudswhichholdend andinter-

derheads.

ROMRIGHTSIDEOFVALVESHAFT

dspinnertypehandle

SFROMSTUDSWHICHHOLDHOUSING

ndspinnertypehandle

SFROMCROSSSHAFTANDFRONTCENTER

ndspinner typehandle

wsfromcrossshaftbracketandfourcap

rackets.Thesecapscrewsholdbracketsto

THVALVELEVERASSEMBLIES(fig.32).

offcylinderheads.Removehousinggasket.

FOLD(fig.32).

n.

sandlockwasherswhichholdmanifold

Removewatermanifoldandgasket.

(fig.67).Liftpushrodsfromcrankcase

HHOLDCYLINDERHEADSTOCRANKCASE

ndspinnertypehandlewithextension

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TD-18)ENGINE

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securecylinderheadstocrankcasestuds.

oneachsideof cylinderheadsandalsoa

twocylinderheadshasflatwasherbetweennut

EADS(fig.69).

rearstudorcap screwoffrontcylinder

dsused.Thenlift cylinderheadupward

eadinsamemanner.

gasketsandgasketrings.

ERATING

eratingLeverRemoval

OVERNORCONTROLREMOVAL

.

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D-18)ENGINE

TOPERATINGLEVER.

in.

eremovenutandlockwasherfrom

vertocross shaft.

pin.

DCONTROLLEVER.

ndspinnertypehandle

wsandlockwasherswhichholdbracket

ase.Thenliftoffbracketandcontrollever

moval

T(fig.35).Fromrightsideofcrankcase,

peratingrodandconnectingpartsattached.

G(fig.35).

g.35).

.*

Thenliftoff latch.

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KET(fig.35).

ndspeeder

asherwhichholdlatchbracketto crank-

hbracket.

NTf^y,(CRANKCASE

N.x 3FT.~~~RAPD17IO4

einHorizontalPosition

REMOVAL.

SLING,rope

9/16-in.,

ypehandle

CASEANDATTACHEDPARTSONITSLEFT

PLANK,2-in.

romleft sideofcrankcase.

attachedpartsonhoistby meansofrope

dedforusewhenremovingenginefromvehicle.

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D-18)ENGINE

er rearofoilpan andanotherloopunder

enblocksapproximately12-inchby12-

t,asa base,andcoverthemwith2-inch

ttachedpartsonplank,pushingassembly

cksunderupperpartof crankcaseto

horizontalposition.

PumpRemoval

ILPAN.

ndspinnertypehandle

,remove32capscrewsandlockwashers

old oilpantocrankcase.Therearethree

onein front.Removeoilpan.

ILPANGASKET.Takegasketoffoilpan.

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MPREMOVAL.

nd,%G-in.

ox,WRENCH,open-end,^-in.

ETURNPIPE(fig.96).

d,WRENCH,open-end,%G-in.

lockwasherwhichholdpipebracket

pipefromoilpumpcover,removingtwocap

Liftofffrontoilreturn pipeandremove

TURNPIPE(fig.96).

d,WRENCH,open-end,%6-in.

odBearingCapRemoval

lockwasherwhichholdpipebracketto

ectpipefromlubricatingoil pumpupper

pscrewsandlockwashers.Liftoutpipe

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D-18)ENGINE

OILPUMP(fig.37).

nd,54-in.

ksdrilledcapscrewsthatholdpump

pscrewsandlockwashers,thenlowerpump

TINGRODREMOVAL,

CH,socket,54-in.,

andle

nnectingRodandPiston

CTINGRODBEARINGCAP(fig.38).

CH,socket,^-in.,

andle

chlockfourconnectingrodboltnuts.

ngrodboltnuts.

dbearingcapwithlowerconnectingrod

sary,tapcaplightlywithrawhidehammer.

NECTINGRODANDUPPERCONNECTING

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onnectingrodbearingjournalis inup-

providemaximumclearanceforremovalof

.Toturnovercrankshaft,firstinstall inend

rewswhichwereusedtohold flywheeltoend

shaftbyplacingbarbetweentwocapscrews.

and piston,takingcarenottodamage

ISTONSANDCONNECTINGRODSBYFOL-

E.

E-SE-654

vePullerToolInstallation

MOVAL.

pen-end,

HC

EEVEPULLERTOOL(fig.40).

e-WRENCH,open-end,

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TO-18)ENGINE

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uller.First,run pullernuttotop of

ugendofrod intocylindersothatlugcan

eeve.Legsof tool"spider"shouldreston

er,sothattoolnutisin centerofcylinder.Then

EEVE(fig.41).Continuetighteningnut

fromcrankcase.Liftouttoolandcylinder

eRingRemoval

EEVERING(fig.42).

free andthenremovering.Ringis

erwall.

SLEEVESINSAMEMANNER.Whenremov-

t isimportanttomarkor systematically

eplacementincounterboresfromwhich

ed.Whensamesleeveistobe installedagainin

eincrankcaseshouldalsobemarkedsothat

s originalposition.

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D-18)ENGINE

nvertedPosition

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RTREMOVAL.

ENCH,socket,9/16-in.,

1-in.,

typehandle

NDATTACHEDPARTSININVERTEDPOSI-

ST

o.3andNo.4 cylinderbores,tying

hhoistto ropeslingatcrankshaftsideof

asefromitssupport.

SealRetainerP/ateRemoval

by12-inchby3-footwoodenblocks(or

used)paralleltocrankcaseandlowercrank-

etweenblocks,withblockssupportingeach

rdsacrosseachendofblocksas aprecaution

goutofposition.

ndspeeder

ewsandlockwasherswhichholddust

arengine support.Thenremovedustseal

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D-18)ENGINE

ESUPPORT.

dspinnertypehandle

ockwasherswhichholdrear engine

supportloosefromcrankcaseandthen

AINBEARINGREMOVAL.

in.

nd

KET,FRONTCOVERBOLT

ontCoverRemoval

OILSEALRETAINERPLATE(fig.44).

wsandlockwasherswhichholdoil seal

eallowerretainer.Thenremoveplategasket

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AINER.

n.

s,lockwashersandflatwasherswhich

ankcase.Alsoremovetwocapscrews,lock

whichholdupperandlower retainerstogether.

sections,twopiecesofoilseal felt,tworetainer

.

RONTCOVER(fig.45).

box,orsocket,

sandlockwashersandeight bolts,nuts

oldcrankcasecovertocrankcase.

ankcase.Thenliftoffcoverand remove

ruffkeysandoilflinger fromtheendof

inBearingCapRemoval

MAINBEARINGCAPSANDLOWERMAIN

,1-in.,and

e,

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TD-18)ENGINE

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mtwonutswhichsecuremainbearing

studs.

oosenthem.Thenliftoffcapwithlower

bearingcapsandlowermainbearingsin

rnutsmustbe removedtoremoveinter-

.

OMCRANKCASE(fig.47).

ndandfifthcrankshaftconnectingrod

opetohoistandlift outcrankshaft.

BEARINGS.Aftercrankshafthasbeenre-

inbearingsfromcrankcase,slidingthemin

AUTION:Identifyorarrangebearingssothey

orrectpositions,ifnewbearingsarenot

ORDRIVE

rDriveRemoval

IVEASSEMBLYREMOVAL,

%-in

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D-18)ENGINE

PRESSORDRIVEHOUSINGFROMENGINE

sandcopperwasherswhichholdhousing

ewalsoholds cliptoplate.

SSORDRIVEWITHGASKETANDDOWEL

menginefrontplate andliftoffassem-

SHAFTGEAR,CAMSHAFTSCREW,CAP

gCamshaftPlatefromCrankcase

4-in.socket.

AFTPLATEFROMCRANKCASE(fig.49).

^-'m.socket

siontoremovetwocapscrewsand lock

haftplatetocrankcase.Itisnecessaryto

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CamshaftGearRemoval

ANKCASE

emoval

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D-18)ENGINE

atwrenchcanbeinsertedthrough gearholes

fig.50).Pulloutcamshaftwithcamshaft

ETS(fig.51).Withcamshaftremovedand

tion,valvetappetscannowbeliftedoutfrom

petguidesareto beremovedwithoutfully

eoftheengine,theymayberemovedat this

eonitsside.Guides canthenbetappedout

(fig.58).

PumpShaftGearHutRemoval

DRIVEREMOVAL.

ocket,1^-in.,

ertypehandle

fig.49).

box,^-in.

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kandthen removetwocapscrewswhich

rshaft.Thenliftidler gearfromshaft.

ONPUMPDRIVESHAFTGEAR(fig.52).

-in.,

typehandle

hat shaftwillnotturnwhengear nutis

sgeartoshaft.

fromendofshaft.

UMP;ASSEMBLYHOUSING,

NT

PumpDriveAssemb/yRemoval

ONPUMPDRIVEASSEMBLY(fig.53).

box,3/4-in.

wocapscrews.Then,removetwocap

gtocrankcasefrontplate.Alsoremovehousing

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D-18)ENGINE

rGearShaftfromCrankcase

MOVAL,

socket,1^-in.,

removenut.

SHAFT.

RENCH,box,yA-in.

eror improvisedmeansofpullingshaft,

mplemethod,asillustrated,isto usepieceof

slong,placingitoverendof shaftand

ewashersand%-inchNationalFineby

ythreaded,screwingcapscrewintoendof

ewuntilshaftis pulledfromcrankcase.

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ATEREMOVAL.

^-in.

LOCKSFROMCAPSCREWS(fig.55).

dsof fivecapscrews.

S.

swhichsecurefrontplatetocrankcase.

E.

omcrankcase.Thenliftoffplateand

.

ontPlateRemoval

LANEOUSPARTSFROMSIDESOF

n.

G-in.

e

nd

and

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TD-18)ENGINE

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EELBOW(fig.56).

6-in.

htsideof crankcase.

BRACKET.

ndspeeder

sandlockwasherswhichholdbracketto

movebracket.

ASESIDEPLATES.

ndspeeder

emovetwocapscrewsandlockwashers

ankcase.Thenremovetwosideplatesand

IDECOVER.

ndspeeder

mrightsideof crankcase,removingfour

ers.Thenremovesidecovergasket.

ELBOWANDCOCK.

e

htsideof crankcase.

AGESLEEVE(fig.57).

oving(steelbar)

movingtoolofasizewhichwill fitover

o crankcaseanddriveoutsleeve.

OILGAGEPIPEELBOW(fig.57).

n.

ftsideof crankcase.

TCONTROLDISKPIN(fig.57).

e

de ofcrankcase.

ETURNPIPE(fig.57).

e

pipe frominsideofcrankcase.

MFRONTENDOFCRANKCASE(fig.57).

sandlockwasherswhichholdplateto

moveplateandgasket.

REMOVAL(fig.58).

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O-18)ENGINE

ATESCREW,CAP

GageSleeve

HAFTBEARING

GuideRemoval

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NITSSIDE.

hsecondand fifthcylinderbores,use

asefromitsbaseandlowercrankcaseagain,

eforeremovinghoistandrope,blockup

evelposition.

ETGUIDES.

ofcrankcaseandtap12guidesloose.

ofcrankcase.

REMOVAL.

fcamshaftbearings,asoutlinedinpara-

forreplacementofoneor morecamshaft

beremovedfromcrankcase.

cold

AMSHAFTBEARINGPLUG(fig.58).

aringisto beremoved,itisnecessaryto

haftbearingplug.Thisstep isnotrequiredfor

tbearings.Toremoveplug,insertsteelbar

andtapplugout ofcrankcase.

.59).

earingandtapchiseluntil onesideof

ntapedgeof bearinguntilbearingisremoved.

erberemovedunlesstheyare tobereplaced,

issible.CAUTION:Donotallowchiselto

CRANKSHAFTBEARINGSINSAMEMANNER

OVE.

MOVAL.

,itshouldnot benecessarytoremove

ceptwhencrankcaseinspectiondisclosesbroken

ds.Inabsenceofstandardstudremovers,

forremovalofmainbearingstudcanalso be

ercrankcasestuds,providingnutswhich

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D-18)ENGINE

tBearingRemoval

StudRemove/

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n.

mainbearingstud,proceedasfollows:

ARINGSTUDNUTSTOSTUDWHICHIsTO

n.

dthreadastightas possible.Then

f firstoneassecurelyas possible.

m.

ud nut,pullingincounterclockwisedirec-

.


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D-18)ENGINE

MBLEDENGINE

ssemblies75

ESUBASSEMBLIES.

nshouldbemadebeforethesubassemblies

mustbethoroughlycleanedin suitable

dshouldbeinspectedforwear,galling or

smustbereplacedandallmovingpartscovered

foreassemblytoprovideinitiallubrication.


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pectbearings

ectdrive


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DISASSEMBLY,REPAIRAND

EMBLIES

n77

y79

fdisassembledcylinderheadparts...80

s85

eforeinstallation86

87

rassembliesandhousing88

veleverassemblies89

sembliesandhousing90

rassembliesandhousing91

fvalveleverassembliesandhousing

semblies93

erassemblies94

elever housing95

ssembliesandhousing96

nkcaseoilpan97

l98

gandinspection99

ion100

val101

sembly102

ction103

haul104

pump105

lation106

removal107

disassembly108

nspection109

overhaul110

onnectingrods^ 111

ectingrodassembliesbefore


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D-18)ENGINE

nstallation113

moval114

spection115

stallation116

18

19

20

n121

arfromthecrankshaft122

nkshaft124

5

ndtappetguideremoval126

7

etappetandtappetguideinspection..128

ndtappetguideinstallation129

ondamperoverhaul130

moval131

erhaul132

tallation133

oval134

sembly135

linginspection136

faircompressordriveparts137

ordrive138

ordrivebeforeinstallation139

lation140

erhaul141

42

bly143

andhousingparts144

fintakemanifoldandhousingparts... 145

old146

n147

l148

oldinspection149

ion150

on151

l152

ion153


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EMBLIES

ginewhicharenot majorcomponentsof

ng,electricalandstartingsystemsaretreated

mponents,refertofuel, lubrication,cooling,

emsections,TM9-1777B.

ovalfromengine,disassembly,cleaning

assemblyandinstallationonengine,asmay

nentsincluded.

vinganycomponentsfromtheenginein

nginedisassemblyiscoveredinsectionV.

orinstallinganycomponentintheprocess

blyiscoveredinsectionVIII.

STRUCTION.

chcoveringthreecylindersareusedin

elyboltedtothe crankcaseandarejoined

e watermanifold.Cylinderheadsarede-

uelinjectionnozzlesand precombustion

ntakeandexhaustvalvesarepairedto

mentandimprovegaspassage.

OVAL.

bliesdonothavetobe removedfromthe

valvespring.See paragraph90.

%6-'m.,

andle

6-in.WRENCH,socket,1-in.,

6-in.andspinnertypehandle

.WRENCH,sparkplug

.(No.32941-D,orequivalent)

T.Seeparagraph29.

FOLD.Seeparagraph142.

ANIFOLDS.Seeparagraph148.

NWIRESFROMSPARKPLUGS.

S.

32941-D,orequivalent)

rench,toremoveplugs.


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EMBLIES

SHAFTOPERATINGRODFROMCROSSSHAFT

mpinwhichholdsadjusting yoketocross

OSTATHOUSINGANDWATEROUTLET

.

wsandlockwasherswhichholdwater

teroutletgasketshouldbe removedwhen

ONPUMPTONOZZLEPIPES.

.

ctorsateachendofeachofsix pipes.To

pes,itisnecessaryto removeclipwhich

head.Removecapscrewwhichholdseach

ecapsortape oninjectionfuelpumpde-

TORCABLEANDELEMENTFROMLEFT

HEAD(fig.62).

6-in.WRENCH,open-end,/8-in.

ch,useanotherwrenchto removecon-

ent.

NIFOLD(fig.62).

ndspinnertypehandle

sandlockwasherswhichholdwater

erhead.Removewatermanifoldandgasket.

SSHAFTTHRUSTBRACKETFROMREAR

.

sandlockwasherswhichsecurebracket

YLINDERHEADFROMDASHANDCOWL

.

sandlockwashersfromdriver'ssideof

Thesecapscrewsholdcylinderheadtodash

vespacersbetweendashandhead.Second

espondingpositiononotherside ofaircleaner.

SINGCOVER(fig.63).

.


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EMBLIES

opperwasherswhichholdcoverto

erandremovegasketandfelt.

ERSHAFTBRACKETSTUDNUTS(fig.64).

m.

terstudswhichholdend andintermediate

s.

FTSPRING(fig.64).

pringwhichconnectsinnerlevertospring

FROMRIGHTSIDEOFVALVESHAFT

ndspinnertypehandle

emovefivenuts.

OMSTUDSWHICHHOLDHOUSINGIN

ndspinnertypehandle

emovenuts.

WSFROMCROSSSHAFTANDFRONTCENTER

ndspinnertypehandle

typehandlewrenchto removefourcap

acketsandfourcapscrewsfromfrontcenter

wsholdbracketstocylinderheads.

ITHVALVESHAFTANDLEVERASSEMBLIES

wardandoffcylinderheads.

ODS(fig.67).Pushrodscanbe liftedout

esandhousinghavebeenremoved.

HHOLDCYLINDERHEADSTOCRANKCASE

ndspinnertypehandle

uredtocrankcasewithnutson 31crank-

w ofstudsoneachsideof cylinderheadsand

weentwocylinderheadshas flatwasher

uts.

EADS(fig.69).

rearstudoffront cylinderhead,re-

Thenlift cylinderheadupwardandoff

eadinsamemanner.

gaskets.


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EMBLIES


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MBLIES

YLINDER"APD12894

ValveSpringswithValveLifter

VALVE

keandExhaustValveandRelatedParts


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D-18)ENGINE

SSEMBLY.

PUNCH,center

ENCH,open-end,%-in.

EXHAUSTVALVESFROMFRONTCYLINDER

PUNCH,center

Removal

fterVL-500,orequivalent,placeclamp

tofonevalve.Thenturncrankof tooluntil

ollarkeys.Releasethevalvelifterand

eat.


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123/322


EMBLIES

valve.

erneathsideofcylinderhead.

muppersideof cylinderhead.

akeandexhaustvalvesinsamemanner.

numberofdotsonfaceofeachvalveto

epositioninwhichit wasoriginallyinstalled.

takeValveGuide

ALVES(fig.72).

moneofspring retainerswhichlocksre-

fstartingvalve.Thenunscrewspringre-

espring.Valvecanthen beliftedoutfrom

erhead.

rtingvalvesinsamemanner.

EXHAUSTVALVEGUIDES(fig.73).

ntil theyhavebeencleanedasinpara-

edforwear.Removeonlythoseguidesthat

ylinderheadinarborpress,or anothersuit-


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D-18)ENGINE

bar ofslightlysmallerdiameterthanguide

dethroughheadby pressingsleeveandguide

Removeremainingintakeandexhaustvalve

ALVEGUIDES(fig.73).Followsamepro-

emovestartingvalveguides.

ZZLEBODYANDNOZZLEBODYRETAINER

.

zzle,Nozz/eBodyand

ad

hholdbodyretainerto cylinderhead

zzlebodyandnozzlebodyretainerwithdust

t,spacerandsecondspacergasket.NOTE:

enozzlebodyandnozzlebodyretainerseals.

zzlesandrelatedpartsin samemanner.

NSIONPLUGS(fig.75).

xpansionplugsin nozzlesideofeach

ansionplugatone endofeachcylinderhead.

emovedexceptin rareinstanceswhenfreez-


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EMBLIES

ld blowoutorloosenplugswithoutcracking

es,plugcanbe removedwithpunch.

ULDNOTBEREMOVED.

EDURETODISASSEMBLEREARCYLINDER

.

epsoutlinedaboveindisassemblingthe

eoperatingcrossshaftthrustbracket.Itis

erheadby twocapscrewsandlockwashers.

2901

onfromCylinderHead

ONOFDISASSEMBLEDCYL-

lve


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D-18)ENGINE

MCYLINDERHEADS(fig.75).

KNIFE,putty

pecarbonfrombottomfacesofcylinder

hin electricdrilltocleancarbonthoroughly

roundvalveseatsand frominsideofexhaust

aretoseethatfaceof headisthoroughlyclean

sthatgasketringsrest (fig.75).

RTIONSOFCYLINDERHEADS.

ning

D12908

derHeadwithWater

ovealltracesofoldgasketand dirt

ad.UseSOLVENT,dry-cleaning,andbrush

omofcylinderhead.

DWITHWATER(fig.76).

sagesandwaterjacketsofcylinder

rhead,usingcompressedair,if available.

ry-cleaning

ncarbonfromvalves.Thenwashthem

ry-cleaning.

S,SEATSANDCOLLARKEYS.

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EMBLIES

inSOLVENT,dry-cleaning.

AD.

forcracks,particularlybetweenexhaust,

penings.

GUIDES.

ectric,portable,

n.

IGHT

eValveGuide

erin electricdrill.Expandtoolcleaner

guidesizeby adjustinghexagonnutonend

debymovingcleanerupand downinside

hatguidesare shinywhenoperationiscom-

y shiningflashlightintovalveguidefrom

.

RESSURE(fig.78).

alveandclutch(IHCNo.SE-1057

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D-18)ENGINE

SpringPressure

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EMBLIES

yforrustand pits.Pitsinvalvesprings

see.soextremecaremustbegivenininspect-

gevidenceofpittingmustbereplaced.

inspecialvalve andclutchspringtester,

Placespringonplatformas nearcenteras

heel,compressingspringtodesiredheight,

ide ofplatform.Thisscalereadsfrombottom

edtodesiredheight,moveoneof knurled

ro toreleaseanyfrictionthatmayexist

rmovinghandle,recheckheightonscaleat

collardirectlybelowhandwheelmaythenbe

tingsnugly,andthe thumbscrewincollar

maythenbe removedandotherspringstested

eeluntilstopcollarcomesup againstbody

edureisthenfollowedinbreakingfrictionand

chintakeandexhaustvalvespringshould

compressed,with50to56poundspressure.

asure1%inchwhencompressedwith26^

g doesnotmeetstandards,itshouldbe re-

ength ofexhaustandintakevalvespring

s.Freelengthofstartingvalvespring should

ever,afteritisout,spring may"set"andbe

ssible,providingspringmeetscompression

takeandexhaustvalvespringshavebeen

typemeasures3V16inches,freelength, and

dswhencompressedto2l/2inches.

prings.

respectiveguideandcheckforexcessive

atvalveguidesshouldbe replaced,providing

dition.

ringfrommovementinguidesand re-

ceofvalveforpitting.Alsoexaminevalve

headforpitting.

n, inchuckofvalverefacinggrinder

rue,otherwiseit iswarpedandshouldbe

RHAUL,

stable,tee

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130/322

E

D-18)ENGINE

LINDERHEAD.Followprocedureoutlined

LLPARTS.Followprocedureoutlinedin

(fig.77).Seeparagraph80b (7).

VEGUIDES(figs.79and80).

eVa/veGuideintoCylinderHead

nedinparagraph80,disclosesneedfor

ouldbepressedinto topofcylinderhead.

chamferedendout.Placebrassdriftof

hanguideoverguideand pressguideinto

veguidesshouldbe pressedintocylinder

topof guidetotopofcylinderhead meas-

veguidesshouldbe pressedbelowthesurface

mtop endofguidetotop surfaceof

16inch.

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EMBLIES

ES(fig.81).

WRENCH,adjustable,tee

dle

or replacementservicearefurnished

alveguide hasbeeninstalledinthe head,it

meterinsidethe valveguidehasbeen

ereit setsinthecylinderhead.Usea reamer

starttakingacutwhenit isrunthrougha

GVALVERAPD12906

itionofStartingValve

en installedintheengine.Insertthe reamer

Documents

TM 9-1777A HEAVY TRACTOR M1, IHC TD-18