Tm 9-731B M4A2, 1943

Embed Size (px)

Citation preview

  • 7/28/2019 Tm 9-731B M4A2, 1943

    1/405

  • 7/28/2019 Tm 9-731B M4A2, 1943

    2/405

    RDEPARTMENT,

    anuary13,1943

    onofthe

    sherBodyDivision,GeneralMotorsCorporation)

    UCTIONS

    -53-17

    andcontrols...6-1318-34

    4

    4

    28-3075-76

    orusingarms... 31-3277-85

    ualconditions...3386-91

    2-95

    3596-99

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    3/405

    NSTRUCTIONS

    ance

    ndequipment...

    rtsandaccessories

    ks

    andinstrument

    unit

    mandcontrols...

    mentandstorage..

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    4/405

    RIAGEM10

    shaft,transmission,differentialandfinal

    ntpanelandmanyotherunitsandaccessories

    areidenticalwiththose usedinthe3-Inch

    yOperator'sManualforMediumTank

    erinformationmaybeusedasa reference

    servicingthose unitswhicharecommonto

    raryOperator'sManualTM9-752Aforthe

    ,M10,isrevised.

    applytobothvehiclesin mainorinpart.

    ndcontrols...............6-12

    ........'............16-21

    22-30

    ualconditions...............33

    .......................34

    35

    ance.......................36-37

    ndequipment...............38-39

    41-72

    .......................73-78

    .........79-84

    -94

    .........95-97

    .......................99-109

    s..........................110-115

    andinstrumentpanel.117-123,125-131,

    145-150

    mentandstorage.............151-153

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    5/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    6/405

    UCTIONS

    t................2

    kM4A2.........................4

    .5

    tendedtoservetemporarily(pending

    ompleterevision)togive informationand

    heusingarms chargedwiththeoperation,

    epairofthismateriel.

    GEMENT.

    ghX)containsinformationchieflyfor

    personnel.

    ughXXVI)containsinformationin-

    anceoftheusing armspersonneldoing

    ofPart II,listsall StandardNomen-

    anuals,andotherpublications,alsoTraining

    erieldescribedherein.

    TANKM4A2(figs.1,2,3,and4).

    nkM4A2isa heavilyarmoredfull-

    eredbytwinsix-cylindertwo-cycleliquid-

    hiefarmamentisa 75-mm.guninacast

    mountedon anall-weldedhullofarmor

    retcarriesacombinationmountfora

    machinegun.The turretplatform,orbasket,

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    7/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    8/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    9/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    10/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    11/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    12/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    13/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    14/405

    chmaybetraversedthrough 360degrees

    electric-hydraulicdrive.Thecombination

    to beelevated25degreesabovethehori-

    egreesbelowthehorizontal.Theturret

    vatedordepressedbyoperatingthe elevating

    o-stabilizerisinoperation,thegunis elevated

    olledbytheelevatinghandwheel,andthe

    allyholdsthegunsteady,atanyquadrant

    it hasbeenlaid,whilethetankis inmotion.

    steelturrethasa thicknessof3inchesat

    desandrear,and 1inchontop.The all-

    te,2inchesthickatthe front,1^inches

    %inchontop.

    are mountedinacompartmentatthe

    neisacompleteunit,withits ownfuelsystem,

    gsystem,andradiator.

    oinedbymeansofaheavyjunctionplate

    bleclutchhousingandpowertransferunit

    nginedriveshafts carrygearsmeshedwith

    nedrivenshaft,whichisconnectedto

    chenginehas itsownclutch,betweenits

    earunit.In normaloperation,thetwo

    thesingleclutchpedal,buteither clutch

    ontrolonthehandthrottlepanel.The tank,

    dwithonlyoneengineshouldthe otherengine

    tof thepowerunitis 375horsepower.

    trolthefuelfeed,toli mitmaximumengine

    oad.Withthisgovernorsetting,the tank

    withboth enginesrunningat2100rpm.

    ating,atankspeed of20mphmaybe at-

    egenerousmarginofpowerinreserve when

    gatfull governedspeed.

    eredby meansoflevers,whichoperate

    piecedifferentialhousing.Brakingiseffected

    ngbrakeleversat once.Ahand-operated

    adrumon thetransmissionoutputshaft.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    15/405

    ransmissionparkingbrakeis eliminated

    versmaybe lockedinappliedpositionby

    missionhasfive forwardspeedsandone

    dditiontothetwo generatorsofthetwin

    ygeneratorunit,consistingofa generator

    ledgasolineengine,isprovidedforusein

    entheDieselenginesare notrunning,andto

    urret-traversingmechanism,gyro-stabilizer,

    yloadonthe electricalsystem.

    75-mm.gunandcal..30machinegunon

    theturret,thetank carriesacal..30machine

    ntinthefrontplateof thehull.Acal..50

    aftfireiscarriedinside theturret,tobe

    cketon theturrethatchring,whichpermits

    al..45 Thompsonsubmachinegun,carried

    ed throughthepistolportin theleftside

    crewconsistsoffivemen.The driver

    ank,tothe leftofthetransmission.The

    sin therightbow,tothe rightofthetrans-

    dthebowmachinegun.Thetank commander

    theturret,justto therightofthe 75-mm.

    ationis almostdirectlyinfrontofthe com-

    onisto theleftofthe75-mm.gun.

    nkisprovidedbytwo hatchesinthebow

    e turret.Forusein anemergency,aquick-

    ovided,inthetankfloor directlybackof

    vecrewstationsthereisa periscope,all

    tedsothattheymaybe rotatedforobserva-

    ed toraiseorlowerthe lineofvision.The

    ectedtothegunmountby linkagethatkeeps

    ntalinementwiththegunasthe gunis

    egunner'speriscopeisfittedwitha telescopic

    aybemoved,independentoftheperiscope

    .Forthedriverand assistantdriver,direct

    ntalslots inthehullfront plate.The

    protectivecovers.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    16/405

    gsystem,Dieselfueloil tanks,and

    powerunit, andthegasolinetankofthe

    e,arefilledfromthetop ofthehullon right

    ftheturret. Eachfilleropening(seefig.26)

    atehavingraisedletters,sothat theymaybe

    nkisequippedwithtwo-wayradiofor

    andwithatelephonesystem(interphone)

    w.

    eld.Aremovablefoldinghood,withsafety

    edfortheprotectionof thedriver.Itmaybe

    cialfittings,tocovertheopenedhatchover

    shieldhasan electricwiperandanelectric

    heircurrentthroughaflexiblecablethatcan

    socketontheinstrumentpanel.

    s.AllM4mediumtanks(M4A1,M4A2,

    megeneraldesignand size,andcarrythe

    denticaltransmissions,volutespringsus-

    hoetracks(steelor rubber).Otheridentical

    rretplatform,gyro-stabilizer,combination

    gun (cal..30)mount.AllM4A2's,produced

    vethesametwinDieselpowerunit,and all

    hulls ofweldedconstruction.M4A2'sare

    orthree-piecedifferentialhousings.The

    differfromtheM4A2in theirpowerunits

    differenttypes).

    hM4A2MediumTankhasaserial

    hecrewcompartmenttotheleft ofthe

    etankserial numberandmanufacturer's

    data.Referto theplatebeforeordering

    onfusionofmodelsandmanufacturers.

    476Ibs.

    reinch(withrubbertracks)13.2 Ibs.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    17/405

    racks)83in.

    t.11%in.

    el

    wo-cycleengine(6cylinderseach)

    46,Series71

    ..U. S.ArmySpec.No.2-102B,Oct.2,1941

    engine)6

    x5in.

    ne)425cu.in.

    sureat1000rpm500Ibs. persq.in.

    Nearesttofan

    4-2-6-3-5

    lutionsfor100crankshaftrevolutions...137

    ginescombined)375

    lershaft880Ibs.-ft.at1500 rpm

    dduringhalts 600rpm

    espeed2100rpm

    speed2250rpm

    4490Ibs.

    andcoolingsystem,withcoolant.5120I bs.

    eachengine,

    ors15gal.

    ntorear ofgenerator)65^in.

    includingaircleaners)59%in.

    adeto bottomofoilpan

    090Ibs.

    sion,differential,andfinaldrives,

    emblies)8035Ibs.

    wearlymodelM4A2MediumTanks

    l..30machinegunsin afixedmountinthe

    mamentlistedhere.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    18/405

    tedincombinationgunmountM-34).

    1919A4(combinationturretmount).

    1919A4(flexibleballmountinfrontplate).

    2HB(flexibleracemountonturrethatch

    5Thompson,M1928A1(carriedonbrackets

    gun,M1928A1,cal..30,M2.

    ercentH.E.,40per centA.P.,

    s

    ercentA.P.,20 percentTracer.300rounds

    ercentA.P.,20 percentTracer.6,750rounds

    660rounds

    ntationM2,2OffensiveM3w/

    mite12rounds

    ont3in

    360degreestraverse.

    SCR-528orSCR-5381

    5061

    cover1

    orange,green3

    l-steel).

    2^6in.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    19/405

    ertracks)4832sq.in.

    hicle148gal.

    4^gal.

    torfueltank)17.3qt.

    completewithtankeach32qt.

    each24qt.

    each8qt.

    ^qt.

    ch1 qt.

    reach2^qt.

    h2%qt.

    sion,one-piecedifferential,

    sion,three-piecedifferential,

    .S.Army2-97A)

    system2^qt.

    r1qt.

    hanism(Oilgear),complete

    my2-96A)

    ers16pt.

    ch15gal.

    ustainedspeedonhardroad 25mph

    riods30mph

    gability60percent

    ngability60percent

    nkwillcross100 in.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    20/405

  • 7/28/2019 Tm 9-731B M4A2, 1943

    21/405

    SANDCONTROLS

    ntrols6

    3

    NONCONTROLS(fig.5).

    rottle.Thefootthrottle,oraccelera-

    es,isatthe leftofthetransmissionhous-

    er'srightfoot.Hand-operatedthrottle

    e,aremountedwithineasyreachof the

    aloperationthe enginesarestopped

    es.

    ringlevers(seefig. 5)aremounted

    river'sseat.To steerthevehicle,pull

    detowardwhichitisdesired toturn.Pull-

    downthe trackonthatsideandcauses

    cktobecorrespondinglyincreased.

    backwithequalforceonboth steer-

    nor stopsthetank,dependingonthe

    kingbrakeleveris locatedonthe

    smissionhousing,totherightofthe

    ratesona conicalbrakedrumattached

    shaft.Onlater modeltanks,thetrans-

    minatedandbothsteering brakesmay

    onbytripping apedal.CAUTION:Always

    ngbrake(s) arereleasedbeforestarting

    parkingbrakeisneverto beusedwhile

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    22/405

    SANDCONTROLS

    ,locatedalongthehullleft sidecon-

    foot,disengagestheclutchesofboth

    eor bothoftheclutchesmaybelocked

    tion)by depressingthepedalalltheway

    controlson thehandthrottlepanel(see

    otride theclutchatanytime,as serious

    esult.The drivermustkeephisfootoff

    uallyoperatingtheclutch.

    transmissiongearsfor speed

    ansofthegearshiftlever,mountedon the

    thedriver.(Seefig.5.)The positions

    e variousspeedsareshowninthedia-

    nis thesameasinautomobilegearshift-

    iftleveris equippedwithalatchtopre-

    tofirstspeedor reverse.Thelatchmust

    ownthebuttonon thelever,toengagefirst

    TION.

    d,thefollowingprestartinginspection

    ertrainunit,fillif necessary.

    etsof tanks,fillifnecessary.

    y,bothengines.Refillas necessary.

    valves(emergencystopbuttonsand

    onditionofportablefireextinguisher.

    szero withbatteryswitchopenand

    catenormalshut-offreadings.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    23/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    24/405

    SANDCONTROLS

    ns

    nletlineshut-offvalveon topofin-

    nlessairheaters aretobeused.Close

    air heatersareused.

    ers,clutchpedal,acceleratorpedal,

    koutsandhandthrottlesoperatefreely

    ndwatchammeterandvoltmeter.If

    edischarge,openbatteryswitchimmedi-

    voltmetershouldnormallyread251/2to 28

    wgun.

    ones.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    25/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    26/405

    SANDCONTROLS

    OR

    MP

    WITCH

    H

    TON

    GAGE

    EGAGE

    H

    GAGE

    T

    LB

    P

    MP

    FF

    C

    T)

    A

    T)

    UTLET

    LL,

    T,

    D

    A

    GHT

    nelLegend

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    27/405

    evel,fill ifnecessary.

    onditionoffixedandportablefire ex-

    ,addwaterifnecessary.

    ooroffightingcompartment.

    valve.

    etlockingmechanism.

    erationofturretweaponsandturret.

    mechanism.

    munition,flags,fieldequipmentand

    fnecessary.

    siondevicesforbreakage.

    nall visionandfirecontroldevices.

    ntsfor defectiveperformance.

    ns, sightingequipmentandaccesso-

    onofsprockets,bogies,springs,guides,

    ngrollers,andidlers.Tightensprocket

    tightness,andtension.

    rsforwear.

    earoftrackconnectorwedgesand

    e.I fnotinuse, checktoseethata

    e.

    leanandcorescompletelyopen.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    28/405

    SANDCONTROLS

    e inspectionplatesareinplaceand

    raincoversandplugsarein placeand

    nk foroil,water,andfuelleaks,

    traceisclearof anyforeignmatter

    tionofturret.

    rbreaks.

    dfuel leaksinenginecompartment,

    mentdoorssecurely.

    ies(pioneertools)arepresent.

    oolantandrefill asneeded.Besure

    penbleedervalveswhenfillingandclose

    torfuel,fillifnecessary.Testauxil-

    NS,

    nstartingmotor(seefig.23) andits

    einstrumentpanel(fig. 7).

    valve.

    pedalall thewaydown,orlockout

    rteriscrankingits engine.

    esforwarduntil theyarefelttoseat

    Lowpressureoil indicatorlightsonin-

    onwhenhandthrottlesare movedintoidle

    atatimeby pressingfirstonestarter

    Do notpressbothstarterbuttonsat once,

    nthebattery.Startingboth enginesat

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    29/405

    d)bymeansofasingle startermustnotbe

    eoverloadon.thestartermotor.Ifengine

    econds,releasestarterbuttonandcheck

    c).

    rted,itmayberun independentlyof

    edthattheclutchofthe secondenginebe

    tedand usedtostarttheseconden-

    smethodisto beusedonlywhenoneof

    tedin thenormalway.

    personnelshouldattempttostart

    owing.(Seepar.8e.)

    e'beenstarted,set thehandthrottle

    peedsat800 to1000rpmforthe warm-up

    eraturegagesread160F(71C)andre-

    nd/ortheclutchpedal.

    Whenthetemperatureisbelow40 F

    ure,whichutilizestheair heaterbuilt

    usedtostartfirst oneengineandthenthe

    s inneutral.

    (seepar.10 d).

    erfuelinletlineshut-offvalve(seefig.

    nel.

    ewide.

    gnitionswitch(seefig.7) onthein-

    ump plungerontheinstrumentpanel

    erclockwise.

    andholditin firmly,whileoperating

    mooth,evenstrokes,using afirmpressure

    hepumpingstroke.(Ifthe weatheris

    tionalstrokesoftheair heaterpumpafter

    auseaftereachstroke,willhelpwarmup

    mstalling.)

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    30/405

    SANDCONTROLS

    release,the starterbuttonand

    etoavoidracingthe engine.

    gnitionswitchpromptly.CAUTION:

    amagedifthe switchbeleftontoolong.

    umpplungerallthewayin andturn

    catchengages.

    gh(10) tostartthesecondengine.

    shut-offvalve.

    vebeenstarted,adjust handthrottle

    peedsat800 to1000revolutionspermin-

    orthewarm-upperiod,andlockthe

    ownthe lockinglever(betweenthe

    ully,releasebothclutchlockouts,

    lowly.

    achednormaloperatingtemperature

    beforestartingthetank,releasehand

    hhandleversto theidlingposition.

    Attemperaturesabove40F(5 C),

    eused.Startoneengineand thenthe

    s inneutral.

    sall thewaydown,thenmovethem

    ,orlockout theclutches.

    tonandholdit firmlyuntilitsengine

    tsecondengine.

    ninstrumentpaneltomakesure both

    thandthrottleleversto equalizeengine

    1000 revolutionsperminute,andlockthe

    y.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    31/405

    rmedup,andalwaysbeforestarting

    ndleverstoidling position.

    aseonlyoneenginecanbe startedby

    edinb andc,preceding,thesecond

    dbycrankingit withtherunningengine,

    ockedout,orclutchpedalfully

    ttleleverofthe runningengineto800to

    teonits tachometer.

    tsreleased,slowlyreleasetheclutch

    otthrottlegraduallyto maintainthespeed

    estarts,againdepress theclutchpedal

    evers toequalizethewarm-upspeedsat

    rminute,then graduallyreleasetheclutch

    rmedup,andalwaysbeforestarting

    eversto idlingposition.

    ingbytowingshould bedoneonlyin

    chinstances,thestepsoutlinedbelow

    oil,and coolingsystemtodetermine

    uldbeplacedin thelowestgear.

    edshouldbeplacedinthehighest gear.

    gineclutches,then,afterthetowed

    otherclutchshouldbe smoothlyengaged

    fuelposition.

    ningover,movethethrottletothe

    enginefires.Iftheenginedoes notstart

    pthevehicleand rechecktodetermineif

    art.Donotcontinuetotow aDieselpow-

    startreadily.

    withthethrottlein theidleposition,

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    32/405

    SANDCONTROLS

    willmovetheinjectorrackpositionto no

    rnedoverfasterthanidlingspeed.

    mperatureis40For lower,operatethe

    s engagedtoturnovertheengine.

    eby towing,starttheotherengine

    gine,observingthe ruleslistedind, pre-

    asstarted,theoilgageshould be

    notindicateoil pressurewithinone-half

    beshutdown andaninvestigationmade.

    ghts(seefig. 7)shouldcomeonwhen

    outofthe nofuelposition,andcontinueto

    heyareautomaticallyturnedoffwhen

    hedasenginespeedisincreased.Iflights

    eedincreases,stopenginesandcorrect

    ee par.45j).

    idlingatspeedof800 to1000revolu-

    stfiveminutes.

    K.

    oroughlyfamiliarwiththefunctionand

    s(fig.5) andinstruments(fig.7)before

    k.

    rmedup, andallinstrumentsshowing

    sreadyto start.

    ke.

    ypressingclutchpedaldownto the

    Disengagelockouts.)

    gear(seefig.6).NOTE:Normal

    d,aremadein secondgear.Firstgearis

    maneuveringthetankinchbyinch,orin

    tingthetank upagradeor indeepmud

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    33/405

    utchpedal,atthe sametimedepress-

    ON:Donotattemptto movethetank

    eaid ofpersonneloutsidethetankserv-

    rtedandpickedupspeed,releasethe

    eclutchagain,then movethegearshift

    gearposition.Releasetheclutchand

    pickuptheload.

    operationsisrepeatedfor eachshift.

    n thehighestgearthatwill permitthe

    overnedspeed(2100 revolutionsper

    ketheDieselenginelabororlug; shift

    theenginespeedup.CAUTION:Donot

    mustkeep hisfootofftheclutchpedal

    ousdamagetothe clutch.

    r,thetank mustbeata deadstandstill.

    dling speed,holddowntheclutchpedal,

    onthegearshiftlever,and moveleverto

    g.6). CAUTION:Backingthetankshould

    utanobserveroutfrontto directthe

    right-handsteeringlevertomakea

    dleverforaleftturn. Thisactionslows

    e oftheturnand speedsuptheother

    erisneeded.Asthe driveranticipates

    readytoopenthe footthrottletoagreater

    harpnessoftheturn.

    esstheclutchpedal,releasethethrottle,

    th steeringleversatthesametime.

    atedonthetransmissionhousing,

    rkingneverwhilethetankisinmotion.

    watertemperaturegage,andtheoil

    stsatisfactoryindicationsofengineper-

    cationsofanyoftheseinstrumentsappear

    shouldbethrottleddownandthecause

    eratureshouldnotexceed190F(88C)

    ditions(seepar.83b).

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    34/405

  • 7/28/2019 Tm 9-731B M4A2, 1943

    35/405

    E.

    ethe footthrottle,andletengineslowto

    otions,pushthehand throttlesdownand

    thewayupto theoffposition.

    RATION.

    fficultiesarelargelyeliminatedbythe

    .53 a),providedthatthelubricatingoil

    radeforthe existingtemperature.

    onditionsitmaybenecessary,inorder

    xercisespecialprecautionsinlubricating

    mament.TM9-850givesinformationcov-

    tofsuchequipmentduringextremelycold

    ationinextremecold,seeSectionVIII.

    RUNIT(figs.143and144).

    rygeneratorisusedto keepthetank

    eDieselenginegeneratorsarenotoperat-

    outputof theDieselenginegenerators

    nit,turret-traversingmotor,gun-firing

    relectricalinstallations,imposeaheavy

    nit, whichismountedinthehull compart-

    o theleftrearof theturretplatform,or

    lt1500-wattgeneratordirectlydrivenby

    gasolineengine.Agovernorcontrolsthe

    oads.Onthecontrolbox,in frontofthe

    hindicatesthechargingrateof thegen-

    he starterbutton,andachargingcircuit

    thecircuitbreaker.Thenormalcharging

    eryis 50amperes.Withafullycharged

    eratorammeterreadingshouldbe3to 5

    wn fuel(gasoline)tank,holding17.3

    ghthe fillerport(seefig.26) marked

    o theleftrearof theturret.

    rproperlubricationofthe unit,%pint

    ustbe thoroughlymixedwitheach

    efuelis putintothetank.Thorough

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    36/405

    SANDCONTROLS

    ubricatethe unitproperlyandtopre-

    ug andtheintakeandexhaustports.

    ble,useSAE50.)

    onthefuel filteratthebottomof the

    32F (0C),closethecarburetorchoke

    ontop ofthecarburetor,directlybehind

    penwhenthe leverisagainstthestop

    henthe engineiswarm,thechoke

    in,andreleaseitas soonasthe

    y,openthechokepartway,thengradually

    itionasthe enginewarmsup.CAUTION:

    das athrottle.Theautomaticgovernor

    per speed,atallloads.

    iarygeneratorunitmaybe startedby

    sonthemagnetoshield.

    f theshield.

    counterclockwiseontheexposed

    ectricstarting(par.13c.(2).

    pulltospin theenginequickly.

    uxiliarygeneratorshouldbeinopera-

    o-stabilizerunit,turretpower-traversing

    phones,andwhenanyofthesolenoid-

    ed,if theDieselenginegeneratorsarenot

    are runningandtheammeteronthe

    catesthatthebatteryis discharging.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    37/405

    operation,theheatfromthe gasoline

    ntothe Dieselenginecompartmentby

    ratorengineblower,onwhichthe engine

    armaircanbe directedintothecrew

    thedoorattheend oftheairduct.

    engine.

    ononthebackof themagnetoand

    eenginestops.

    ockclockwiseuntilit isfullyclosed.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    38/405

    ntinstallationintheMediumTank

    gunandacaliber.30 machinegunona

    turret;aflexible-mountcaliber.30ma-

    w;acaliber.50machinegunformounting

    chring forantiaircraftfire;andacaliber

    edinside.

    ecaliber.30machinegunin theturret

    se(effectedbytraversingtheturret),

    greesabovethe horizontalanddepressed

    ontal.Elevationoftheseguns iscontrolled

    yro-stabilizer,whichautomaticallymain-

    onwith referencetothehorizontal

    n.Thegunnersitstothe rightofthe75

    elevatingandtraversingcontrols,the

    firingswitchesforboth turretguns(or

    al).Thegunnersightsthroughatelescopic

    pe(par.15e).Themountforthe gunner's

    thegunbyan armandlink,sothat the

    lychangedwithanychangeingun eleva-

    maintained(vertically)onthetarget

    controllingthegun.Calibratedcontrols

    tthe reflectingprismofthetelescopeto

    etargetwhenthe guniselevatedtothe

    e tothetarget.

    dtotheleftof the75mmgun.A per-

    atedinthetopof theturret,ina mount

    vedtochangetheangleofvision.Apistol

    sideofthe turret.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    39/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    40/405

    or-

    for-

    y"

    ound

    o

    ound

    250-

    n-

    0-

    on

    nd

    y"

    und

    y"

    .

    o

    moke.

    e,M6.

    ve

    towage

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    41/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    42/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    43/405

    orthecaliber.50 machinegunison

    ing.Thehatchring maybelockedto

    vingmountintheturrethatchis pro-

    nkcommanderwhenthehatchisclosed.

    hinegunis carriedinabracketinthe

    abovetheradio.

    .

    14).

    anisms(figs.10and148).

    canbetraversedmanuallybymeans

    nicallybymeansofahydraulicmechanism

    raversingoftheturretmaybe doneat

    erdirection,dependingonthe degreeand

    pistol-gripcontrol.A disengagingshift

    ersingmechanisminoperativeaslongas

    formanualtraversing.Thepowertravers-

    versinghandwheelaredirectlyinfront

    of theturret,withreferencetothe

    tedbyatelltalearrow(on topofthe

    spointsto thefrontendofthe tank.

    ockingclampwhich,whenengaged,pre-

    It isimportantthatthislockingclamp

    d(withthehandwheelturnedasfaraspos-

    rclockwise)beforepowerormanualtra-

    empted.

    ngthewheeloftheturret locking

    lturnno farther,tocompletelydisen-

    he turretringgear.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    44/405

    ACK

    er'sStationinRight Bow

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    45/405

    traversingmechanism,alwayscheck

    ersesfreelywithoutbinding.Pushdown

    handtraversinggripwhileslowlyturn-

    oengagethe handtraversinggears.

    eesby hand,tomakecertainitdoesnot

    echanismmaynowbeengagedand

    anismdisengagedbypullinguponthe

    ingthe handle.

    onthefaceoftheturret master

    heswitchstarts themotor,whichdrives

    draulicpowertothe traversingmechan-

    izer.

    rotatedbyturningthepistol-grip

    eddirection.Thetraversingspeedis in

    to whichthehandleisturnedfromits

    efartherthe handleisturned,thefaster

    thepowertraversingmechanism

    emotorswitchto theoffposition.

    g theturretclamphandwheelall

    ckwise,rotatingtheturretslightly,if

    clampintheturret gear.

    .138;148-150).

    e75 mmgunwiththetankin motion,

    heldataconstantangleof elevation,with

    ontal,bymeansof thegyro-stabilizer

    ydraulicelevatingcylindertooffsetthe

    nk.CAUTION:Donotoperatethe

    nkisstandingstill, toavoiddrainonthe

    hestabilizeroilgage(fig. 149).The

    hereservoirshouldshowat leasttwo-

    oilifneeded.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    46/405

    ggearsout ofmeshbypushingin on

    oftheelevatinggearclutchlever(fig.

    urledlever totheleftand releasingthe

    erwithgyro-stabilizerpowerswitchon.

    abilizercontrolbox(fig.150)mounted

    negunbracketto leftof75mmgun, to

    N:Donotturnon currentorattemptto

    tilcontrolboxhasbeenplacedin correct

    ertical,thegunwillmoveandmay seri-

    rret.

    gplug(fig.150)isconnectedtothe

    mentknobon therecoilandstabilizer

    o.

    urntheturret switchtotheonposi-

    ertoggle switchtotheleftor onposition.

    condsforthe gyrostoreachtopspeed.

    owone-halfminuterunningtimefor

    tmentknobslowlyto therightasfar

    rates,indicatingtoostiffanadjustment,

    yuntilmovementstops.Failureofthe

    sitionindicatesinsufficientstiffness.If

    sthestiffnessrheostatknobis adjusted,

    sitedirectionuntilthevibrationis elimi-

    maybenecessarytomakeslight changes

    knobfromtimeto timeasconditions

    siredelevationbyturningtheelevat-

    coiladjustmentknobonthecontrol

    rfiringthefirst round,changethe

    eknobto theright,orclockwise.Ifthe

    to theleft.Checktherecoilsettingafter

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    47/405

    andadjustuntilthecorrectsettingis

    hestabilizer,certaincautionsareto

    anddownrapidlybyhand,toavoid

    aroundthe pistonrod.

    evation,avoidturningthehandwheel

    ts limitofelevationordepression.Con-

    wheelwillcausethe motortolabor,and

    tight,andmovingpartsproperly

    whenturningonthestabilizer.There

    .Changeinoillevelwhenstabilizer is

    ceofairin thesystem.(Forremedy,see

    speedof thetankwillcausethegun

    g,it isessentialthatthespeedof the

    s possible,withtheenginerunningatfull

    etankat reducedspeed,shifttoalower

    nespeed,ratherthan runonpartthrottle

    heauxiliarygeneratorshould always

    stabilizerorthepowertraversingmechan-

    ingstill,thegunshouldbe controlled

    abilizerexceptwhenthe tankisinmo-

    .30machinegun.

    .Thetwo turretgunsarefiredelec-

    ng buttons(foot-operatedswitches)to

    efootswitchesoperateonlywhenthe

    switchboxistothe leftoronposition.

    whenthefiringswitchison. Theright

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    48/405

    , theleftswitchthecaliber.30machine

    befiredmechanicallybyapedalmounted

    hes.

    ndoperationofthe75 mmgunare

    07. Certainprecautionsshouldbenoted:

    escopeisperfectlycalibratedwiththe

    themachinegunby firingonatarget

    sedandLocked

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    49/405

    keanynecessaryadjustmentatthe rear

    gunwiththegyro-stabilizerinopera-

    ndrecoiladjustmentsareproperlyset.

    t5atthe start,andadjustedasnecessary

    shots.

    ndHousingDetails

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    50/405

    ervesthestrike ofhiscaliber.30

    inegunbymeansofhisperiscope.

    hineguncanbe firedthroughthepistol

    alsothroughtheperiscopeoftheloaderor

    caliber.45guncanbeused alsotosupple-

    r antiaircraftfire.

    egunis firedfromaspecialmount

    chring (fig.145),whichpermitsanall-

    tverticlefireforantiaircraftuse.

    picsight(figs.13and14).

    e,orperiscope,isprovidedfor each

    n(seefig. 4).Eachperiscope,exceptthat

    withTelescope,for75MMGunner

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    51/405

    mountedinarevolvingplatewhichpermits

    the mountcanbetiltedtoraise orlower

    wsareprovidedto holdthemountsta-

    periscopeisheldin placeinitsmountby

    .Asafetylockontheperiscopehousing

    mfallingoutif thenutbecomesloosened.

    e,pushitupwardintoplaceuntilthe

    mount.(Iftheperiscopedoesnotenter

    ertheheadguardbolts havebeentight-

    theyprotrudeinsidetheperiscopemount.)

    he backoftheperiscopeandmovethe

    emovetheperiscope,unlatchthesafety

    ut,andpull theperiscopedownbythe

    copesarereplaceable.Theyarepur-

    ragilematerialsothat,in caseofahit,

    nbecomewedgedinthe mount.Care

    dlingperiscopestopreventcrackingor

    mgunner'speriscopeislinkedto the

    ndsynchronizingrodlinkage(seefig.149)

    esinaccordwithanychangeintheeleva-

    copeincludesatelescopewhichcanbe

    deflection,toprovideforits calibration

    dby boresighting)andtopermitthe

    andthe observationofitsstrike.

    pistolportis intheleftside ofthe

    eat.It isequippedwithaheavycover,

    nor closedposition.Toopenthepistol

    o releasethelatch,thenpushdownand

    swingtheportcoverup andout.When

    will go,turntheleverhandleto engage

    ketattheleftside oftheport.

    Whenthe turrethatchisopen,a safety

    eofeachhatchcover,keepsthecover

    .Toclose,pull outthecheckreleasering

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    52/405

    ehalfcoverequippedwiththe locking

    Whenboth coversareclosed,theyshould

    tchhandleto engagethelatchwiththe

    thehatchcoverringfromrevolving,turn

    eredge oftheturrethatchring isin

    ring, thenpushthelockingbarup into

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    53/405

    on18

    20

    fficiency,tanksmustbesystematically

    alsinorderthat possibledefectsmaybe

    beforetheycauseseriousdamage.

    TION.

    membersofthecrewbe utilizedinthe

    erthedirectionof thetankcommander.

    heentiretankas wellastheengine,as

    OPERATION.

    vershouldbe alerttodetectabnormal

    Heshouldbetrained todetectunusual

    achengineshouldbe listenedtoindividual-

    t isdetected.Thedrivershouldglance

    ntpanelgagestosee whethertheengine

    unsteadyoilgagepointermayindicate

    leakin thesuctionsideoftheoil pressure

    espeedisfairlyconstant.Thedriver

    hefreetraveloftheclutchpedal (par.90).

    eversmustbe checkedtomakesurethat

    circumstancesshouldavehiclebeop-

    troublehavebeenobserved.Whenin

    tionappliestotheentire vehicle,and

    .

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    54/405

    ALT.

    orshouldmakeacarefulinspectionof

    sgeneralmechanicalcondition.Minor

    peration,anddefectsdiscoveredatthe

    eforeresumingthemarch.Ifthe defects

    gthehalt,reportto theproperauthority.

    eis asfollows:

    nashorttimeat idlingspeed.Listen

    peedupthe engineseveraltimes,again

    oilpressuresandenginetemperatures.

    or oilleaks,insideandoutsidethe

    stmentandforworn,loose,broken,

    dirtfromrollers andfrombetweenbogie

    formissing,worn,orlooseparts.

    noiltemperaturegage.

    djustment.

    eparts,connections,andleaks.

    s.(Donot useanoilyor dirtyrag.)

    PERATION.

    soperation,thecommandershouldre-

    tothat madeathalts,butmorethorough

    onshouldbefollowedbypreventivemain-

    tbecorrected,theyshouldbereported

    charge.Oilchecksshouldbemadeonlevel

    sbeenallowedto standuntiltheoil has

    kselectorvalveshouldbeclosedwhen-

    e tobemade.

    astingsorother metalpartsmayofte

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    55/405

    pletionofarun bythepresenceofoiland

    lbecoveredin theinspection:

    bogies.

    cketsforwornor brokenteethand

    tsforunserviceableunits.

    ddifferentialoillevel.

    aners.

    ageofexhaustmufflersandaccessories.

    siondevicesforbreakage.

    ntsfor defectiveperformance.

    operlyinstalled onguns,sighting

    es.

    ndfightingcompartmentsforcleanli-

    ment.

    ter,andammunition.

    tioninhotweather,batterywatermust

    eaweek.

    rrettraverse.

    xiliarygenerator.

    on commander'sreport.

    N.

    pectionsareprescribed:

    lesofoperation(whicheveroccurs

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    56/405

    ksParagraph

    orlooseparts,

    26; 64

    ndclean

    kandadjust90

    ationandback-

    rainand refill25b

    ons

    .60b(1)

    sandvalvesfor

    ubricateattwogreasefit-

    ersinggear

    se

    ksparkplug136a

    0milesofoperation(whicheveroccurs

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    57/405

    ksParagraph

    n21a

    Cleanout;correctcauseof

    ctfordirtycondition,

    36

    spect119b

    ingandlu-

    kandadjust90

    lubricate97,98

    atorsandfan

    orleaksat

    leanifnecessary..75 d

    k,andreplacefilterele-

    heck,andadjustifneces-

    49

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    58/405

    nes25

    6

    cationGuide(figs.16and17) for

    sthepointstobe lubricated,theperiods

    cantstobe used.Besidestheitemslisted

    suchas doorandshieldhinges,pistol

    es,mustbekeptlubricated.(Oilholes

    paintedredfor easyidentification.)

    romthe oilsupplytankbythe pres-

    dispumpedthroughtheengine oilcooler

    donthe outersideofeachengine.The

    hroughthe enginelubricatingoilcircuit,

    mps(frontandrear)in theengineoil

    avengerpumpsreturnit tothesupply

    passvalveintheoil cooleradapterby-

    pumpto theenginelubricatingsystem,

    heoil coolerinletbecomesapproximately

    epressure attheoilcooleroutlet.

    housedintheoilpump,and anoil

    attachedtotherear ofthecylinder

    ange.

    (seepar. 60)foreachengineare

    (fig. 30)ontheenginecompartment

    filteris bledoffoneofthe oilpassages

    dthroughthefilter element,andreturned

    an.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    59/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    60/405

    oprearofeachengine leadsfromthe

    ylinderhead.Abreatheroutletat the

    theair cleanerinlets.

    OOLER.

    r(par.104f) ismountedinthe crew

    enteroftheenginebulkhead(seefig. 74).

    irculatesthroughthecoolerandbackto

    wotubes,whicharelocatedtothe right

    ng,onthe hullfloor.

    NKSANDLINES(figs.18and19).

    telubricatingoil tankisprovidedfor

    lledthroughits ownfillerholeonthe top

    ret.Oillevelisshownby thecombination

    e(par. 122e(10))on theinstrument

    nes.

    goiltankdrainplug coverplate,below

    boxor open-endwrench).

    s(squarei/2-inchAllenwrench).

    eoilpan drainplugcoverplatesbe-

    hopen-endwrench).

    pandrain plugs,oneinthefront and

    engine.

    nes(fig.19). Engineoverheatingand

    ubrication(asoutlinedinpar. 45,Trou-

    etheneedforremovaland cleaningof

    s,andpossiblereplacementoffaulty

    emoveoil lines:

    systems(par.25b).

    utlethoses tolubricatingoilfilters,

    filters(fig.30)and atthejunctionplates

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    61/405

    seefig. 19)betweeneachlubricating

    eatherconnector.

    goilinletand outlettubes,frombe-

    pectionplatesremoved(seepar.71 b

    onnectionsfromthelowerrear outer

    nd disconnecttubesfromlubricatingoil

    ttingsthathavebeenremoved,and

    ngtheremovalprocedure.

    UCTIONS.

    oninstructionsforMediumTank

    informationandguidanceofall con-

    previousinstructions.

    mustbelubricatedinaccordancewith

    tainedinTechnicalManualsand/orOrd-

    ns.ReferenceismadetotheGeneral

    6-10)foradditionallubricationinforma-

    de section(OFSB6-2)forlatest

    16and17).Lubricationinstructions

    dbytheusingarm areshowninLubrica-

    pecifiesthetypesof lubricantsrequired

    heyare tobeapplied.Thedetailedlubri-

    owcontainthesameinformationasthe

    dataarereproducedare10 x15inchlam-

    partof theaccessoryequipmentofeach

    ntainedinthelubricationguidesare taken

    ndarebindingonusingtroops.

    bersintheLubricationGuide(figs.16

    ingnotesgivingadditionallubrication

    nindividualunitsandparts.(Cold weath-

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    62/405

    d

    Point!

    ted

    owi.

    ERloe.t.donnameplatein.idefightingeompartmnt.

    it

    achl

    OE

    gCG

    1

    /i,'[

    oss

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    63/405

    ERlocatedonnameplateinsidefightingcompartment.

    ensionSs

    of Tank

    s

    CGSuspensionsystemidler

    rackCG%

    efill

    %

    %

    %

    rpose

    ide,MediumTankM4A2

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    64/405

    iceattemperaturesbelowzeroF (-18

    IDENOTE

    er(M4A2Only)3b

    s4

    ,andfinaldrives7a,b

    7c

    nt 10

    "."11

    nly)12

    2Only)13

    enengineis removedfor

    gs15b

    tionservice16

    DLUBRICANTSTOBEUSED

    perature

    tem

    eunit)

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    65/405

    yinglubricant.Lubricateuniversal

    ndtracksupportrollers,and tachometer

    rs,untillubricantoverflowsatreliefvalve;

    newlubricantis forcedfromthebear-

    ified.CAUTION:Lubricatesuspension

    edarefornormalservice.Forextreme

    water,sand,mud,snow,dust,etc.,reduce

    e-half,ormoreif conditionswarrant.

    61).The powerunithassixoil bath

    blowerinlethousing.Threetypes of

    t type(AC)'cleanerhasasingleoval

    (AC)cleanerhashorizontalslots.The

    anerhasverticalovalslots.All sixair

    runitmust beofthesametype.Always

    eservicingotherpartsoftank,to permit

    n dry.Thefrequencyofservicingair

    ustandsand conditionsencountered.

    ndconditions,serviceaircleanersevery

    matureenginewear.Allsix cleanersmust

    me.

    voirevery25hoursoroftener,as re-

    ions.

    moutsideofaircleaners.

    enwingbolt andremoveaircleaner

    housingports.(Donotstuffloose rags

    ofaircleanerwith elementandpour

    imentandwipecleanwithragsoakedin

    oncleaner,removesnapringand baffle

    ninstallbaffle andsnapring.)

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    66/405

    eals,andgasketsforwear,and replace

    onofairfilter elementforcloggingand

    voirwithusedcrankcaseoilorOIL,

    (CAUTION:Donotoverfilloil reservoir.)

    ening)1 qt.

    zontalslots)31/-!qt.

    valslots)2J/2Qt-

    emovecoverfromintakehousing,and

    refulnotto spilloilinto housing.Tighten

    ssecurely.

    ementevery100 to500miles,or

    wsaccumulationofdust,dirt,or foreign

    mbled,brushoffor blowoffdirtand

    lterelementor uppersectioninclean

    pper section,andblowoffordrain

    emblingthecleaner,fillingthereservoir,

    elementis notdried,fueloil drawninto

    ousdetonation.

    ter.Cleantheair filtermonthly,as

    ingairfilter(seefig.144) tocar-

    washpartsin SOLVENT,drycleaning.

    ssemblefilter.

    erscreenin OIL,engine,SAE30.

    uretor.

    s(fig.18).Eachenginehas itsin-

    kmountedonthefloor intheforward

    artment.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    67/405

    nk daily.

    urntank gageselectorswitch(see

    to eitherlubricatingoiltankposition.

    engine,grade specifiedinTableof

    dsfull.Donotoverfill.

    thertank.

    ubricatingsystemevery250milesor

    Tank

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    68/405

    erplatesunderhull floorandremove

    atingoiltank andtwodrainplugsfrom

    GOILFILTERSFILLERTUBE

    LHOUSING

    LinesandTanks

    dinstallafterunitshave draineddry.

    .

    iltankwith 32quartsofOIL,engine,

    Capacities.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    69/405

    ckoillevelin bothtanks.Addoilif

    to fullmark.

    ubricatingoilfilters(see fig.27)for

    onfilterpanel.

    tat eachoilchange(every250miles

    terdrainplug,and filterelement.

    withragsoakedinDieselfuel oil,

    nplug.

    t.

    new covergasket.

    orleaks.

    oilifnecessary.

    achenginehas alubricationoilstrainer

    e engineoilcooler.

    goilstraineron eachengineevery250

    perationcanbestbeperformedwhile

    isemptyduringoilchange.)

    tionplateinfloorof enginecompart-

    moil strainerhousingandloosen

    r.

    ethoseelbowfromengine oilpanby

    rboltwithgasket,strainer,housing,

    andoutersurfacesofelementby

    oil.Donotscrape,oruse wirebrush.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    70/405

    minsideof housingandfaceofoil

    nwithragsoakedinDiesel fueloil.

    nggasket,andreplaceifnecessary.

    centerbolt.Insertcenter boltpart

    fullyslideelementintohousing.

    ngheld inplace,firmlyseattheele-

    eradapter.Centerthehousingandtighten

    tighten.

    ingnewgasket.Makesure flatside

    onplate.

    differential,finaldrives,andengine

    al,andfinaldrives,withone-piece

    und,removetransmissionfillercap

    ndicatorrod.

    withcaprestingonfiller neck.(Do

    illevel.Add OIL,engine,gradespeci-

    fnecessary,tobring leveluptofull

    ontight.

    50 milesandevery3,000miles

    atelyaftertankhasbeenoperated.)

    drainholecoverunderhullfloor.

    drainpluganddrainplug fromeach

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    71/405

    nplugsand installafterunitshave

    illerneckstrainer.

    nerinDieselfuel oilandre-install.

    apacitywithOIL,engine,SAE10,

    to fiveminutes.

    dinstallplugsanddrain holecovers.

    erentialandfinaldriveswith OIL,

    TableofCapacities.

    nfillerneckwith quantityspecified

    .

    utesandrecheckoillevelin trans-

    bring leveluptofull mark.

    al,andfinaldrives,withthree-piece

    aldrivesinseparatehousings.

    seea (1),preceding).

    50 milesandevery3000milesthere-

    ftertankhasbeenoperated.)

    drainholecoverunderhullfloor.

    drainpluganddifferentialhousing

    meachfinaldrivehousing.

    drainplugsandinstallafterunits have

    e a(3),preceding).

    erential,andfinaldrivehousing,with

    edinTableofCapacities.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    72/405

    ferentialthroughtransmissionfiller

    edinTableofCapacities.

    meachfinaldrive housing,filltowithin

    plugs.

    utesandrecheckoillevelin trans-

    bringlevelupto fullmark.

    e.

    milesor 50hours.

    fig.21) andaddOIL,engine,SAE30,

    xmonths,oratclutchoverhaul.

    nerunderdrainplugs,bothsides, and

    dry,installdrainplugs.

    ll withOIL,engine,SAE30,toover-

    meofdisassemblyofclutchfor in-

    roverhaul,cleanandrepackclutchpilot

    androllerbearing.

    clutchpilot bearingpullertoolJ-1914

    of toolthroughbearing.Expandfingers

    gcenterstud.

    against flywheel.Turndownnut

    romturning,to pullbearing.

    lyincleanfuel oilandblowdry.In-

    norroughspots onballsorraces.Replace

    bt.

    withGREASE,ballandroller bearing.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    73/405

    ftapproximatelyhalffullofGREASE,

    o boreofflywheelbyhand.

    ngdriver,J-1910,or othersuitable

    outerraceofthebearing,anddrive bear-

    aceofflywheel.

    tersat extremeendsoffilterpanel

    tersonside ofengineatflywheelend).

    daryfuelfilters(see fig.27)daily.

    ersfor oneengineonly.

    ddry,close draincocks.

    untilevenfuelflowhas beenrestored.

    toperations(1), (2)and(3)for

    elementevery1000miles or100hours.

    valve(fig. 83)tooffposition.

    t topoffilterand removebowland

    nDieselfuel. Donotscrape,oruse

    withcleanDieselfuel.

    welementgasketandbowlgasket.

    to onposition,startengine,and

    hrough(6)for otherprimaryfuel

    filterelementevery5000milesor500

    to offposition.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    74/405

    of bowl.Dropbowl.

    ndcleaninside ofbowl.

    tand reassemble,usingnewgaskets

    attopandbottonTof filterelement.

    nection,turnfueltankselectorvalve

    ch,andrun otherenginetofillfilter bowl

    oseconnection.

    artengine,andcheckforleaks.

    othly,replacefilterelementonother

    nt (figs.97and98).Every1000

    haftuniversaljointsandslip joint.

    thousingfrontcover.

    yGREASE,generalpurpose,seasonal

    ing(see fig.97)untilit overflowsthe

    tslipjointplug (seefig.97)and

    ting.

    lpurpose,seasonalgrade,untilit

    ingandinstallplug.

    ousingcover.

    rearpropellershafthousingcovercan

    tplatformhatchdoor.

    ovebolts,andremovecover.

    lpurpose,seasonalgrade,topropeller

    eefig. 97)untilgreaseoverflowsrelief

    cationofclutchselectorlevershaft,

    edatthis time.

    ousingrear cover.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    75/405

    (seefig.92).Every1000 miles,lubri-

    shaft.(Thisoperationcanbestbeper-

    e rearpropellershaftuniversaljointis

    tchdoor.

    tting throughholeinleftside of

    rearof batterybox.

    yGREASE,generalpurpose,seasonal

    138).The hydraulicoiltankforthe

    nismismountedatthesideof theturret

    acityoffour quarts.

    0miles.

    ttwo-thirdsfull,asindicatedonglass

    ofoilreservoir.

    vis47,untiltwo-thirdsfull,and

    m.

    vel.

    appingswitchon andoffuntilsystem

    wlyturnoperatinghandle firstin

    er.

    singmechanismuntilmovementis

    thesystem.

    ecessary,tomaintainlevel.

    43and144).Thetwo-cycleair-cooled

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    76/405

    vestheauxiliarygenerator,mountedon

    erear,islubricatedbyOIL,engine,

    eron outsideoftankupperdeckat

    removefillercap.

    IL,engine,SAE 30,witheach

    ouringmixtureintofuel tank,which

    e.

    seefig.144)and strainer.

    strainer.

    trainer andbowl,thenopenfuel

    mfollowerfeltevery200hours.

    magnetoshield.

    eortwodropsof OIL,engine,seasonal

    wick.Donot over-lubricate.

    iles,lubricatedoorand shieldhinges,

    tolport covers,escapehatchleverand

    ushings,controlrodpins,clevises,clutch

    ntrolshaftbearingsgearshiftleverlinks

    nd controls;steeringbrakelevers,

    ports,controllevers,andpins;machine

    eriscopeholderpivots,races,andcover

    partsnotspecificallycoveredinthe

    L,engine,SAE30.

    enengineis removedforinspectionor

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    77/405

    flywheelhousingandfill hinged-cap

    30.Replaceplug.

    fstarter motorhousingatoilercap

    mmutatororbrushes.

    ngs.

    earingsandcleaninDiesel fuel.

    EASE,generalpurpose,No.1,and

    packgreasechannelsfullbefore

    pipeplug,whichwillforceadditional

    tionservice.Waterpumps,clutch

    bogiewheelsuspensionlinkageandslides

    naldrivesprockethubbearings,hy-

    ndturretelectricalmotorbearings.

    RDS.

    structionsarecloselyfollowed,proper

    tisfactoryresultsarenotobtained,a

    ordnanceofficerresponsibleforthemain-

    cordoflubricationservicingwillbe

    themateriel.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    78/405

    30

    ofeachmotorvehicleissuedbythe

    ustbekeptintheOrdnanceMotorBook

    erallycalledLogBook,whichisissuedwith,

    any,thevehicle.TheMotorBook,keptup

    ecordthatprovidesvaluableinformation

    ancecosts,replacements,etc.,andorganiza-

    quirethatentriesbemadecorrectlyand

    istobe keptinacanvascovertoprevent

    d.

    ns.Beforeavehicleentersthecombat

    ebearingarecordof assignmentmustbe

    stedreferencestotheidentity oftheorgan-

    removed.

    hechiefsourcesofwearto amotorvehicle.

    reallowedto accumulate,particleswill

    rfaces,causingabnormalwearand,if the

    emedied,resultinginseriousdamage.

    are toberemovedinmakingrepairs or

    everworkingjointsorbearingsurfacesareto

    painstakingcaremustbeusedto protect

    ddirtthatmight finditswaytothe exposed

    oved.Toolsmustbeclean.The possibility

    theopeningwith thesleeveorotherpart

    minated.

    dgrit, hardenedgrit,orroadoil,use

    ppliedwithcloths(notwaste)orbrushes.

    powerplantsand electricalinstallations,

    ferewiththeiroperation.Cloggedoilholes

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    79/405

    e(neverwith wood,whichmightbreakor

    clogthepassages).

    cleaningisincludedin TM9-850.

    URETOGAS.

    xposedtogasrequirespecialcleaningand

    ent,describedinSectionIX,Decontamination.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    80/405

    FORUSINGARMS

    epartslists31

    32

    NDSPAREPARTSLISTS.

    carriesaset ofpioneertools,mostof

    utsideof thehullbybracketsandstraps;

    rtools,carriedinsidethetank;andspecial

    sidethetank,forgasdecontaminationand

    ghtingandfire controlequipmentforuse

    aliberguns.

    from dataavailableattimeofpublica-

    n VehicleMaterielListissuedbyOfficeof

    andfurnishedwitheachvehicle.Listsof

    andequipment,withnumberper tank,are

    arriedoutsidethetank.Quantity

    aruse1

    ,5Ib.)1

    8076orD48067isused)....26

    uthandle)1

    45ft 1

    bleface,10-lb1

    1

    kset.Quantity

    bayonettype1

    hydraulictype,fitting1

    ^in.sq.drive,5in. long...1

    e,10in.long 1

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    81/405

    et(continued)Quantity

    g........................1

    (pressure).................1

    peen,2Ib.................1

    drive,12 in.long(with

    uty,15in.(buttonheadfit-

    oint,8in.................1

    ..........................1

    n.sq.drive,9in ...........1

    s5in.blade ..............1

    urpose,1%in.blade.......1

    urpose,\yzin.blade.......1

    ve,*/s in.sq............1

    rive,% in.hex...........1

    ive,yz in.hex...........1

    ve,% in.hex...........1

    ve,% in.hex...........1

    ive,% in.hex...........1

    ive,y8 in.hex...........2

    ive,% in.hex..........2

    ve,1 in.hex............1

    ive,\.VK in.hex..........1

    ve,iy8 in.hex..........1

    ve,iy2 in.hex..........1

    17in. long...............1

    x3J O.D.,15yardslong____ 1

    0 ft.roll.................1

    drive,11in. long.........1

    .drive,17in. long.........1

    .drive ................1

    gleend,8in.long...........1

    gleend,12in.long..........1

    blehead,alloysteel,

    1

    blehead,alloysteel,

    blehead,alloysteel,

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    82/405

    FORUSINGARMS

    et(continued)Quantity

    blehead,alloysteel,

    blehead,alloysteel,

    blehead,alloysteel,

    (fortransmissionandoil

    (differentialfilleranddrain

    %in.hex1

    sin.hex1

    %in.hex1

    %in.hex1

    %in.hex,.1

    %in.hex1

    %in.hex1

    airtoolscarriedintank.Quantity

    .30machinegun.

    nts)1

    on,Ml2

    6;2

    rrelbearingplug1

    .50machinegun.

    1

    mm.gun. Quantity

    oint,4 in.long1

    point,6in. long1

    moving1

    1

    lpeen,20oz1

    nt,4 in.long1

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    83/405

    mm gun.(continued)Quantity

    0in. long1

    351)1

    nts)1

    pinretainer,1

    ng1

    ehandle,12in.long1

    blehead,\Yin.x1^in.(for

    t)1

    tainer1

    ories.Quantity

    er,forspareuse1

    ating,\y2qt.,Mil2

    M19365

    0212)1

    w/spout,8qt 1

    eandstabilizer,"inblack

    pandcoverM19105

    !

    QMCStandardA-353)...2

    ,C02(fixed)2

    C02(portable)2

    C-273(red)

    1FLAG,MC-275(green)

    ModelC5

    -chart)1

    8,7ys,7%,7%5

    orleftfrontonly)1

    1

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    84/405

    FORUSINGARMS

    es(continued)Quantity

    ,M.G.M1919A4FM23-50.1

    ,S.M.G.M1928A1FM23-401

    ,M.G.M2FM23-651

    enadesFM23-301

    mm.gun,M3TM9-3071

    erator,TM9-7581

    canB101420)1

    ommandtanksonly1

    8,SCR-528,orSCR-538...1

    men,cans60

    men,cans2

    eM19411

    ER

    s8^in.high,4^f6in.diam.

    pment.Quantity

    M6,forspareuse15

    SOPE,M38)1

    SOPE,M38)forspareuse1

    use4

    n,M3 1

    .

    1

    quadrant,Ml1

    er's,complete1

    ewels

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    85/405

    din tank.Quantity

    urnishblockinaccordancewith

    -end12

    lepin)2

    owshacklepin)2

    onnection12

    PMENT.

    ystem.

    andaroundtheengines,afixedtype fire

    videdfortheenginecompartment.Thesys-

    undcarbondioxidecylinderscompanion-

    etsontheleftside ofthetankhullto therear

    necteddirectlytodischargenozzlesin the

    e enginecompartment.Whenturnedon,

    dintothe enginecompartmentinclouds,

    ION:Ifpossible,stopenginesincaseof fire.

    lindersareoperatedby eitheroutsideor

    eoutsidehandles(fig. 26)areunderneath

    rret ontheleftsideof thetank,forwardof

    ilfiller pipecovers.Theinsidehandlesare

    chedtothehull roof,totheleftrear ofthe

    ssibleforservicingthroughthehatchinthe

    sall thewayoutandlet go.Afteruse,

    erswithfullychargedextinguishers.

    mustbeexercisedinhandlingcylinders

    eunderhighpressure.Donotdrop,strike,

    lindersawayfromexcessheat.

    ftener,weigheachfire extinguisher

    xedtype)weighslessthan9^2pounds,

    gedcylinder.

    inguishers.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    86/405

    FORUSINGARMS

    nguisherandControls

    dsfromcylindervalvebybackingoff

    arofcylindervalves,supportingtheheads

    matelynormalpositionbywiringthem to

    rt.

    nnectingtubefromeachextinguishervalve

    emovecylinderswithconnectingtube

    tvalves.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    87/405

    vecylinderclamps.

    lly.

    guishers.

    vedfromcylinder,removecover,expos-

    screwstomakecertainclampis tightand

    amp.Totightensetscrews,usea slender

    e)thatwillfollowscrewintohole.

    andlebyinsertingpin incontrolhead

    lockwiseuntilclutchpinandarroware

    pinandseal wire,ifnecessary.

    dischargenozzlesand otheropenings,

    fforeignmatter.

    ngcylinderson bracketandpartlytight-

    mlooseenoughtopermitcylinderstobe

    ectcontrolheadsandtubing. NOTE:When

    utletsfaceinoppositedirections.

    connecting)tubetovalveoutlet.

    cylindervalves.Makecertainheadsare

    dup witharrow)beforeinstallation.Tighten

    s.

    ers.

    ndcarbondioxidefireextinguishersare

    onsonbeside thedriver,oneinthe turret

    on.

    xtinguisherin thelefthand,graspcone

    thebaseofthe coneatthehoseconnection,

    of dischargeisdeterminedbytheposition

    ischargeatbaseofflame,withtheconeas

    me.Increasetherateofdischargefromthe

    iminishes.Afteruse,replacecylinderwith

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    88/405

    FORUSINGARMS

    ftener,weigheachcylinder.If theex-

    weighslessthan3^pounds,replaceit with

    er.

    efireextinguishingsystemrequiresno

    insureits properoperation.Asthesystem

    st bekeptinoperatingconditionatall times;

    ctionshouldbemadetoinsurethatapparatus

    safetyoutlet ofvalve.Ifnotintact,cylinder

    hargedandmustberechargedimmediately.

    willbeperformed:

    es.Inspectentiresystemfor anymechan-

    nthatshieldednozzlesarefreeof foreign

    ys.Weighcylinderstodeterminethe

    onotattempttodeterminecontentbymeans

    weightandcarbondioxidechargeare stamped

    oceedasfollows:

    btractfromthisweight theemptyweight

    vebody.Emptyweightincludescylinder

    esnotincludethe controlhead.Iftheresult-

    ylinderislessthannine pounds,cylindermust

    edcapacityoftenpounds.

    saredisassembledfromcylinders,remove

    m.Checkcableclampsetscrewstomake

    pull outofclamp.Afterreplacingcover,

    tomakecertainthatcabledoes notbind.

    dshouldrotate,andthe pinshouldadvance.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    89/405

    SUALCONDITIONS

    NS.

    .

    equivalentsoftheFahrenheittempera-

    ,seetableparagraphf(2),following.

    tenanceofautomotivevehiclesatlow

    torswhichdonotexistatnormaltemperatures,

    nancepersonnelmustspendmoretimein

    ailuretogivethis extraservicewillresultin

    saryandunwarrantedexpense,andfailureto

    ebeendividedintotworanges,minus

    elowminus30F.Enginesand lubricants

    hysicalpropertiesbelowminus30F. In

    quipmentforsupplyingheattobatteries,en-

    ir willberequired.

    derU. S.ArmySpecification2-102B

    snecessarytoprocureacommercialfuel

    verifythatthepourpoint is10degrees

    peratureanticipated;otherwisethefuel

    rature.

    zero,iffuel doesnotflowfreely,dilute

    ry.

    rmicecrystals,whichwillinterferewith

    utiontopreventwaterfromgettingintothe

    ayskeepthefuel tankfull.Thiswill

    aterfromthefreeairspaceabovethe fuel.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    90/405

    SUALCONDITIONS

    mperaturesaboveminus10F. iscovered

    onInstructions.Thefollowinginstructions

    ntthisinformationandapplyonly toinstances

    lsbelowminus10F.for longperiods.

    epingengineoilsufficientlyfluidfor proper

    esbelowminus10F.arelisted below.Pref-

    he differentmethodsintheorderlisted,

    vailable.

    ,drain enginelubricatingoilfromtanks

    ndstore inawarmplaceuntil vehicleisto

    evehiclein aconspicuousplaceinthedriving

    sonnelthatcrankcasesareempty.Ifwarm

    attheoil beforerefillinglubricationsystem.

    heatonlytothe pointwherethebarehand

    rning.)

    eptoutdoorsandif theoilcannotbe

    swithatarpaulin.Aboutthreehours before

    lacefire potsunderthetarpaulin.TheVan

    typeblowtorchmaybeused.

    atingoil.(Oil maybedilutedwithDiesel

    wsthequantitiesof diluenttobeadded

    bedintheLubricationGuide(seepar.26)for

    uantitiesofdiluentwillformmixturesfor

    temperaturesindicated.

    rstdilutedturntheengine overseveral

    and diluentthoroughly.Diluentshouldbe

    r mixedwithoilbeforefilling.

    percentageoflightdiluentwillincrease

    isreason,theoil levelshouldbechecked

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    91/405

    al,andfinaldrives.

    e lubricantsprescribedforuseatminus

    eneor gasoline,or15percentDieselfuel.

    edilutionofthelubricants,heatthegearcases

    orchlightlyoverthe entiregearcase;

    atinone spot.

    cribedforuseat minus10F.willfurnish

    temperaturesaslowasminus30F. for

    elowminus30F.,greasescomparableto

    perature,orGREASE,0.D.No.00,

    cannotbeappliedat temperaturesbelow

    ildings.In anemergency,whenheated

    ,useoil,and inspectandlubricatefrequently.

    tems.

    anentantifreezesolutionsshouldbe used,

    pedwitha high-pointthermostatthatbegins

    ndis fullyopenat185F. (85C.).Alcohol

    lywiththisthermostat,becausealcoholboils

    estone),isprescribedforuseasananti-

    ,ethylene,isnotobtainable,othermate-

    wingtable liststhequantityofPrestoneor

    obeaddedtopreventfreezingat theindi-

    ciation

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    92/405

    SUALCONDITIONS

    ntifreezesolutions.

    onsshouldbetakenbeforeputtingin the

    oroughly.Theradiatorsandcylinder

    eparatelyinordernot totransferanyresidue

    eaks;tightenthe hoseconnectionsand

    tthatwaterand theantifreezesolu-

    eforetheyarepouredinto thecoolingsys-

    separately,thewatermayfreezebeforethe

    solutionbecomesthoroughlymixed.

    thermostatsarefunctioningproperly,

    Checkthebrushes,commutators,and

    mutatorsareclean.Thelargesurgesof

    tingthecoldenginesrequire goodcontact

    mutators.

    nallconnections,especiallybattery

    akenthatthereare noshortcircuits.

    cyofbatteriesdecreasessharplywith

    ,andbecomespracticallyzeroatminus40 F.

    withthebatterywhenit hasbeenexposed

    nus30F.withoutfirst warmingupbattery

    enerator.Keepauxiliarygeneratorinopera-

    runningsmoothly.Seethatthebatteryis

    hydrometerreadingbetween1.275and

    terywillnotfreezeattemperatureslikelyto

    cticclimates,butafully-dischargedbattery

    start,removeanyicefromwiringor

    t.

    40F.i tisnecessarytopreheatthe ingoing

    ginesintheM4A2tank(seepar. 8b,Cold

    atestarting.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    93/405

    easureforDieselengines istodirecta

    takemanifold.Heatedairis oneofthe

    esel engines.Airheaters(seepar.8b)

    ngactioncontinuedfora shortperiodafter

    all cylindersarefiring.

    0F.to- 30F.

    start,seethateverythingisin readiness

    rtonthefirst cranking.Haveoneengine

    ttemptingtostarttheotherengine.

    ginemustbeturned overasrapidlyas

    acriticalcrankingspeed;theymustbe turned

    oreany firingispossible.ForGeneralMotors

    chanicalcondition,thiscriticalspeedmay

    utionsperminute.Belowthisspeedtoomuch

    ylinderwallsandengineswillnotfire.

    started,run at800-1000revolutionsper

    medupto 160-180F.

    30F.

    paulin,tent,orportableshed. Placeoil

    hecoveringaboutthreehourspriorto time

    elteredareasshieldedfromwind.Cold

    ficulties.

    ollectin thefuellines.Ifthe enginedoes

    noughfuel,heatthefuellinesand filters

    offire.

    estmechanicalcondition.

    ervicedprior totheadventofcold

    s,ifnecessary,soitwill pourfreely.

    inespeedmomentarilybeforemovinghand

    on.As theenginecoaststoastop, itwill

    roductsofcombustion,includingwater

    theengine.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    94/405

    SUALCONDITIONS

    es.

    terielis atthediscretionofofficersin

    lapsibleshedsareuseful ascovers.

    or VanPragblowtorches,ordinaryblow-

    beused forheatingvehicles.

    itiesfor changingbatteriesquicklyare

    emetal standsareusefulforheating

    necompartmentdoorcoverscanbe

    lptokeeptheenginerunning atnormal

    s.

    4A2isbuiltand equippedforoperation

    emperature,andovervariedterrain.There

    recautionswhichtheoperatingcrewand

    houldobserve,withrespecttolubricationand

    rain,andother componentsofthevehicle.

    temperatures.

    olingsystemisfunctioningefficiently.

    ges.

    gSystem.

    erplantis adequatetomeetperformance

    udes.However,thesameprecautionsasfor

    tionshouldbeobserved.

    andoperationunderotherextremely

    ynecessitatecleaningtheaircleanersas

    hours(par.64).

    k(withrubber tracks)inmountainous

    andsnow,wheresufficienttractionisnot

    rsareprovided,whichshouldbeinstalledas

    5.NOTE:Grousersarenotnecessarywith

    ldbeperiodicallycleanedofmud,snow,

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    95/405

    nation34

    CONTAMINATION.

    nstantdangerofgasattack,unpainted

    ttouchtheopticalpartsof instruments

    mstobe protectedbyoilfromchemical

    butammunitionisexcluded.Carewillbe

    ttouchtheopticalpartsof instruments

    s.Materielnot inusewillbe protected

    ble.Ammunitionwillbekeptinsealed

    racticallynoprotectionagainstmus-

    rand oilcloth,forexample,willbepene-

    The longerarticlesofclothingareex-

    gerin wearingthem.Rubberbootsworn

    ithmustardgasmayoffera gravedanger

    evenseveraldayslater.Impermeablecloth-

    or anhour,butshouldnotbe worn

    teriel.

    tsof materielthathavebeenexposed

    andlewisitemust becleanedassoonas

    rycleaning,orALCOHOL,denatured,

    ould thenbecoatedwithengineoil.The

    atetheexteriorsurfaces,thebore,the

    dallporous attachmentssuchasstraps,

    ecesexposedtogas.

    beenexposedtogasmustbe thor-

    anbeused.To cleanammunitionuse

    noncorrosive;ifthisagentisnot obtain-

    oolwater.Aftercleaning,wipeall ammu-

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    96/405

    CAUTION:drypoweredAGENT,decon-

    e),usedfordecontaminatingcertain

    ustnotbe usedonornear ammunition

    sflamingwhenitis broughtintocontact

    theremovalofliquidchemicals(mus-

    ateriel,thefollowingstepsshouldbe

    acompletesuitofimpermeablecloth-

    kwillbeworn.Immediatelyafterremoval

    hwithsoapandwater(preferablyhot)

    omesin contactwithanyskinareas,if

    stardgets intotheeye,orif thevaporof

    perativethatcompletefirst-aidtreatment

    hirty minutesafterexposure.(First-aid

    M-91850andFM-21-40.)

    stardwillbe decontaminated.Ifim-

    eenexposedtovaporonly,itmay bede-

    intheopenair,preferablyin sunlight,for

    e cleanedbysteamingfortwohours.If

    hasbeencontaminatedwithliquidmus-

    ht hourswillberequired.Varioussteam-

    sedfrommaterialsavailableinthe field.

    aterielofdirtthroughthe useofsticks,

    urnedorburied immediatelyafterthis

    uldberemovedfrommaterielbefore

    ,bymeansofSOLVENT,drycleaning,or

    roil,appliedwithrags attachedtosticks.

    tedsurfacesofthematerielwithbleach-

    gonepart AGENT,decontaminating

    partwater.This solutionshouldbe

    .Washoffthoroughlywithwater,then

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    97/405

    and instrumentsexposedtomustard

    aminatedwithAGENT,decontaminating,

    partsolidto15parts solvent(ACETY-

    thismixtureis notobtainable,use

    achingsolutionmustnotbeused,because

    rumentlensesmaybecleanedonlywith

    asmallquantityofALCOHOL,ethyl.

    tlywithengineoil.

    contaminating(chlorideoflime),is

    ybetemporarilycleanedwithlargevol-

    er,mustardlyinginjoints orinleather

    movedbythis procedure,andwillremain

    eruntilthe materielcanbeproperlyde-

    dwashedfrommaterielinthismanner

    nd,necessitatingthatthecontaminated

    hwarningsignsbeforeabandonment.

    minatingofmaterielcontaminatedwith

    ompoundsintothesoil,poisoningany

    tyfor bothmenandanimals.

    ngthathasbeen contaminatedshould

    thbleachingsolution.Intheeventthat

    nt,itmaybe necessarytoburnorbury

    econtaminationiscontainedinFM

    8,1941,Decontamination.

    automotivemateriel.

    ensubjectedtogasattackwiththe

    anersshouldbe servicedbyremovingthe

    ndelementswithSOLVENT,dryclean-

    propergradeofoil.

    ldbecleanedin thesamemanneras

    shionswillbediscarded.

    mentsthoroughlywithbleachingsolu-

    edonein thefield.Operatorsshouldcon-

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    98/405

    enrunningunderconditionsofhightem-

    zationofthemustardorl ewisite.

    icleswillbedecontaminatedwith

    ntingmaybenecessaryafterthisoper-

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    99/405

    REL

    henthe lossofatankto theenemy

    rippledtankmust beabandonedduring

    nkis disabledonthebattlefieldandits

    ankwillbe destroyedbyitscrew.

    tancespermit,machinegunsandtri-

    ,andtheantiaircraftgun,togetherwith

    rtheseguns,shouldbe removedfromthe

    distancebeforedemolitionofthetank.

    teriel.Thetankcrew,besidesbeing

    onofitsowntank,may becalleduponto

    thervehiclesandmaterieleitherthat

    s,orabandonedorcapturedenemymate-

    ed.Ingeneral,enemymaterielshould

    wnequipment.

    arlyvehiclesthatarebeingsetafire,

    royedona bridge,inadefile,or atleast

    heenemy,unlesssuch actionwouldalso

    riendlytroops.

    vehicles.

    ntitankweapons.

    randrocket,or

    enadelauncherandrifle,or

    nkgun.

    andonedvehicle.

    nintothevehicle,aimingat thefuel

    oad.Ifagoodfire isstarted,thevehicle

    yed.Ifnot,theengine,suspension,and

    agedbyantitankfire,inthe ordernamed.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    100/405

    REL

    LightTanks)using TNT.

    fTNT.(CAUTION:Donotusenitro-

    vethanTNT.)

    twominutes'length).

    .

    ehicle.

    eldedorboltedin placeinsidetheen-

    tthebulkheadandnearthegastank.

    oconnecttheenginecompartmentwith

    ,soastopermitinsertionof thecapand

    sholeshouldbeas smallaspossible,and

    earemovableplug.Thismodification

    cepersonnelunderthesupervisionof an

    ksofTNTin theimprovisedbracket

    t.Carrythefuzeandcrimpedcapin the

    destroytank,insertcapandfuzeinthe

    last willsetthevehicleonfire and

    redvehicles.

    eforeachrubbertiredesirable,but

    able,butnotmandatory.)

    nadeundereachtire.

    neaccessorieswithaxeor sledge.

    plug.

    eincendiarygrenades.Theensuing

    ndmostofthevehicle.

    rgencies,action(a)and(b)will

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    101/405

    eaponsof75mm caliberorlarger.

    pter(forcalibersof155mm orlarger)

    eapproximatelycenteredinthetube.

    eacha slittrenchorotherprotection.

    rtire).

    .PlacethearmedM9A1grenade

    ottouching)thenoseof theshellwhen

    nademustpoint towardthebreech.In-

    Takecover.Fire.(Thiswilldestroy

    echanism,anddosomedamagetothe

    ncendiarygrenadeagainsteachtireand

    asbeenexperiencedinunfuzingthe

    onshouldbe performedinadvance.)

    N-M14per guntube,plusoneper tire.

    PlacefiveAN-M14grenadesinthe

    roundwheninserted.Ignite.(Thether-

    .Iftheenemyattemptstofire thisgun

    e,thegunwill bedestroyed.)Placean

    eachtireandignite.

    on.

    rrubbertire.

    rolequipmentandsmallparts.Fire

    nintorecoilsystemandother critical

    gainstricochets.Setfiretoeachtireby

    enades.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    102/405

    REL

    ndaircraftcannonlessthan 75mm

    rrubbertire.

    thmudandstonesfor alengthofat

    roundHEshell.Firefromslit trenchor

    adeagainsteachrubbertireandignite.

    paragraphf(3).

    gmuzzlewithmudand rock.Take

    ershelter.Fire.

    shagainstrocks,trees,etc.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    103/405

    NSTRUCTIONS

    ANCE

    ndLCengineparts".37

    ceandrepairsbythe crewandotherunits

    minedbytheeasewithwhichtheprojectcan

    chtimeisavailable,thenatureofthe terrain,

    onditions,concealment,shelter,proximityto

    available,andtheskill ofthepersonnel.As

    xactsystemof procedurecanbeprescribed

    sareincludedinorder thattheoperation

    erpretedbythosedoingthework.

    aning,lubricating,tighteningboltsand

    adjustmentsofsubassembliesorassemblies

    kingrepairsto,or replacementof,apart,

    y,thatcanbeaccomplishedwithoutcompletely

    emblyorassembly,anddoesnotrequireheavy

    ning,fitting,and/oralining.

    movingthepart,subassembly,orassem-

    eplacingit withaneworreconditionedor

    orassembly.

    mpletelyreconditioningandplacingin

    unserviceablepart,subassembly,orassembly,

    dingwelding,riveting,machining,fitting,

    esting).

    rsonnelisauthorizedto removeand

    wertrainunitassembly;however,thereplace-

    therengine,or thereplacementofapower

    smissionassembly,mustnotbe doneby

    rizationis receivedfromordnancepersonnel.

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    104/405

    ANCE

    intenancedutieswhichmaybeper-

    ersonnel.All otherreplacementsandrepairs

    dnancemaintenancepersonnel.

    ,SERIES71,MODEL6046

    sket46b

    Replace46candd

    Replace47

    48c

    handi

    e72b

    60b(1) (b)

    (b)

    61c

    c

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    105/405

    andAir Heater

    e

    9handi

    ssembly50b

    ng

    56c

    eplace63b

    ve66c

    e65b

    vice75 c

    eplaceelement75d

    76c

    e78

    b

    eplace70b

    82c

    eplace83c

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    106/405

    ANCE

    h

    a

    02bandc

    c

    05and106

    9

    cande

    bearings.112d

    2eandf

    aseseals.114e

    52b

    ace54c

    7f

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    107/405

    ce119b

    e119b

    faceplate122bandc

    Service(M4A2only)132

    place133j (3)

    M4A2Only)

    y)

    140

    Controls(M4A2Only)

    ervice143

    ENLAANDLCENGINEPARTS.

    powerplantareidenticalexceptfora

    semblies.Caremustbeexercisedininstalling

    surethattheyarecorrectfor theenginefor

    ssembliesaredifferenton theleft(LA)

    and inprocuringreplacementpartsitis

    hichenginetheyarerequired:

    erBodyassembly,waterpump

    vernorcontrol

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    108/405

    ANCE

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    109/405

    e

    r

    ,

    t

    eel

    norcon-

    ve

    tlet

    ction

    ction

    operat-

    throttle

    e

    t,upper

    erjunc-

    ary

    y,injec-

    ndgov-

    uregage

    to

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    110/405

    SANDEQUIPMENT

    ).

    pairtoolsforthetwinDieselpowerunit are

    nanceorganizationsasshownin thefollowing

    ETOOLSMECH.

    r;also

    -

    push

    d(set

    tor

    ompression

    epilot

    ng

    head

    sure

    assem-

    ng,twin

    ock

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    111/405PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    112/405

    SANDEQUIPMENT

    ETOOLSMECH.CO.CREWPLAT

    ntiming..XX X

    bleflare

    top

    .X

    row-

    umpXX X

    ationalspecialrepairtoolsforthe main-

    M4A2isasfollows:

    CH.CO.CREWPLAT

    bayonettype..X..X

    rtable,25lb.,

    w/HOSEand

    ngXXX

    iner,assem-

    r,assembling,

    oilretainer,

    or,removing...X..X

    compartment

    etfront

    eld (M4A2

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    113/405

    ret(M4A2

    ,w/SIM-

    djust-

    onheadtype,

    eon,assembling..XXX

    eelgudgeon....XXX

    gudgeon,

    type....X

    ete....X

    y2sq.extra

    udgeonclamp-

    ngX

    nstalling....X

    aldrive,dif-

    ugX XX

    .hexXX

    ansmission

    X

    driveXX X

    sq.drive,

    X

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    114/405

    SANDEQUIPMENT

    CH.CO.CREWPLAT

    et,%in....X

    et,%in....X

    et,%in....X

    et,%in....X

    et,%in....X

    et,%in...X

    et,%in....X

    ecial,1in.sq.

    onsistingof:

    quare ...XXX

    long,IK

    aleX XX

    eX XX

    nspection

    wheelgud-

    acket

    ubnut....XX X

    X

    X

    retainer

    supportroller

    supportroller

    ex.,bogie

    ing,special....XXX

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    115/405

    OOLSMECH.CO.CREWPLAT

    ex.,extra

    essorXXX

    tespring

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    116/405

    RTSANDACCESSORIES

    ndaccessories40

    EPARTSANDACCESSORIES.

    parepartsissuppliedto theusingarmfor

    partsmostlikelyto becomebroken,worn,

    e.Thesetiskeptcompletebyrequisitioning

    rganizationsparepartsare listedinpertinent

    arepartsis coveredinSectionVI,Care

    sincludetoolsandequipmentrequiredfor

    ssemblingastheusingarmis authorizedto

    ngandpreservationofthe armament,sight-

    ent,ammunition,etc.Theyalsoinclude

    ndotheritemsnecessarytoprotectthe

    seor whenitistraveling.Accessoriesshould

    otherthanasprescribed,andwhennotin use

    s,armament.Aseparatesetofspareparts

    mforeachsubcalibergun.Afterthe initial

    completebyrequisitioningnewpartsto

    ancesareprescribedintheSNL'sforthe

    t.Theaccessoriesaretoolsandequipment

    rcleaningandpreservingthesubcalibergun

    gacompleterecordoftheir use.

    cessoriespertank.Theissueper tankof

    hearmamentcarriedbyMediumTankM4A2

    al..30,BrowningM1919A4.

    ank.(Forcompletelistofrepairparts,

    PublicDomain,Google-digitized

    /http://www.h

    athitrust.org/access_

    use#pd-google

  • 7/28/2019 Tm 9-731B M4A2, 1943

    117/405

    ivot1

    s)1

    ontents)2

    l(w/ocontents)...2

    mbly1

    ushing1

    y2

    bly2

    2

    mbly1

    /ocontents)1

    y1

    1

    ank.(Forcompletelistofrepair part