Product:WHEELSCRAPER
Model:621BWHEELSCRAPER36V
Configuration:621BSCRAPER36V00001-UP(MACHINE)
OperationandMaintenanceManual
621BTRACTOR-SCRAPER
MediaNumber-GEG05018-00PublicationDate-01/03/1974DateUpdated-10/10/2001
621Tractor-Scraper
Copyright1993-2021CaterpillarInc.
AllRightsReserved.
PrivateNetworkForSISLicensees.
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Product:WHEELSCRAPER
Model:621BWHEELSCRAPER36V
Configuration:621BSCRAPER36V00001-UP(MACHINE)
OperationandMaintenanceManual
621BTRACTOR-SCRAPER
MediaNumber-GEG05018-00PublicationDate-01/03/1974DateUpdated-10/10/2001
AfterStarting
1.Keepenginespeedlowuntiloilpressureregisters.Ifoilpressuredoesnotregister,stopengineand investigate.
2.Operateunderlightloadfor5minutes.
3.Checkenginecoolingsystemwarninglight.Iflightison,stopengineandcheckcoolingsystem.
4.Checkcrankcaseoillevelwithengineatlowidle,machinelevelandoilwarm.Oillevelshouldbe betweenADDandFULLmarksonENGINERUNNINGsideofdipstick.
5.Checktransmissionoillevelwithengineatlowidle,machinelevelandoilwarm.Oillevelshould bebetweenADDOILandFULLmarksondipstick.
6.Checkhydraulicoilfilterchangeindicator.IfREDplungerislockedinvisibleposition,havefilters serviced.
7.Checkaircleanerserviceindicator.IfREDpistonislockedinvisibleposition,haveaircleaner serviced.
Gauges
Checkgaugesfrequentlyduringoperation.AllgaugesmustindicateinNORMALoperatingrange. Theammeterreadingisnormalwhentheindicatorisatoronthe(+)sideofzero.
Copyright1993-2021CaterpillarInc. AllRightsReserved. PrivateNetworkForSISLicensees.
SatNov1310:59:48UTC+05302021
Product:WHEELSCRAPER
Model:621BWHEELSCRAPER36V
Configuration:621BSCRAPER36V00001-UP(MACHINE)
OperationandMaintenanceManual
621BTRACTOR-SCRAPER
MediaNumber-GEG05018-00PublicationDate-01/03/1974DateUpdated-10/10/2001
BeforeStarting Walk-AroundChecks
Foryourownsafety,andmaximumservicelifeofthetractor-scraper,makeathoroughwalk-around inspectionbeforemountingthetractor-scraperorstartingtheengine.Checkforsuchitemsasloose bolts,trashbuild-up,oilorcoolantleaks,conditionandinflationoftiresandconditionofcutting edges.
1.Checkcrankcaseoillevel.OillevelmustbeinSAFESTARTINGRANGEonENGINE STOPPEDsideofdipstick.
2.Checkcoolantlevel.Maintainlevel1/2inch(1cm)belowbottomoffillpipe.
3.Checkhydraulicsystemoillevel.MaintainlevelaboveADDmarkinsightgaugeortoFULLmark ondipstick.
4.Checkaircleanerserviceindicator.IfREDpistonislockedinthevisiblepostion,haveaircleaner serviced.
5.Checkfuellevel.
6.Checktransmissionoillevel.Oilshouldshowondipstick.
7.Checktirepressures.(RefertoTIREINFLATIONINFORMATION.)
8.Checkcontrolsforfreemovement.
PositioningSeat
Fastenseatbeltsecurely.Alwayscheckconditionofseatbelt.Seat adjustmentmustbecheckedatthebeginningofeachshiftandwhen operatorschange.
NOTE:Enginemustberunninganddriverseatedwellback.
1.Toadjustseatposition,pullleveroutandhold.Slideseatforwardorbackwardasdesired.Release leverandmoveseatslightlytolocklever.
2.Adjustdampingvalveforridingcomfort.
1.Moveleverupforfirmerride.
2.Moveleverdownforsofterride.
3.Forheightadjustment:
1.Moveleverforwardtoraiseseatposition.
2.Movelevertocenterdetentpositionformid-heightposition.
3.Moveleverbackwardtolowerseatposition.
Copyright1993-2021CaterpillarInc. AllRightsReserved. PrivateNetworkForSISLicensees.
SatNov1310:59:15UTC+05302021
Product:WHEELSCRAPER
Model:621BWHEELSCRAPER36V
Configuration:621BSCRAPER36V00001-UP(MACHINE)
OperationandMaintenanceManual
621BTRACTOR-SCRAPER
MediaNumber-GEG05018-00PublicationDate-01/03/1974DateUpdated-10/10/2001
Controls
TractorIndividualWheelBrakes
Pushhandleforwardtoapplytractorrightwheelbrake.
Pullhandlebacktoapplytractorleftwheelbrake.
NOTICE
Donotuseindividualtractorwheelbrakestosteertractor.
Pullleverbacktoapplyretarder.
Pushleverforwardtoreleaseretarder.
NOTICE
Anticipatetheuseoftheretarder.Threeorfoursecondsareneededto engagethehydraulicretarderoncetheleverismoved.Handleposition determinestheamountofretarding.Thefartherbackthehandle,the morebrakingaction.Usetheretarderatleastonceaweektokeepseals lubricated.
DifferentialLock
Depresspedaltolockdifferential.
This is the sample of the manual Click on the download link for complete Manual
Releasepedaltounlockdifferential.
NOTICE
DonotattempttoturnthetractorwhenDifferentialLockisapplied.
TransmissionHold
Depresspedaltolocktransmissionindesiredgearrange.
Releasepedaltoallowtransmissiontoshiftautomatically.
NOTICE
DonotdownshiftwhenTransmissionHoldisdepressed.
LightSwitch
O-OFF
D-DASHLIGHTS
H-DASHANDHEADLIGHTS
Parking/EmergencyBrakeControl
R-RELEASE
E-EMERGENCY
P-PARK
CushionHitch
L-LOCKDOWN
C-CUSHIONRIDE
Bowl-Apron(Singlelevercontrol)
H-HOLD
L-LOWER-Pushhandleforwardtolowerapron.
Bowl
R-RAISE
H-HOLD
L-LOWER
Q-QUICKDROP
R-RAISE
H-HOLD
L-LOWER
F-FLOAT-Controlwilllockinthispositionuntilmovedmanually.
R-RAISE
H-HOLD
L-LOWER
Ejector
Apron
F-FORWARD
H-HOLD
R-RETURN
L-LOCKOUT-Controlwilllockinthispositionuntilejectorreturnstorear,oranothercontrolisengaged.
NOTICE
Donotmoveejectorforwardwhenbowlisfullandapronisclosed.
Copyright1993-2021CaterpillarInc. AllRightsReserved. PrivateNetworkForSISLicensees.
SatNov1310:59:03UTC+05302021
Product:WHEELSCRAPER
Model:621BWHEELSCRAPER36V
Configuration:621BSCRAPER36V00001-UP(MACHINE)
OperationandMaintenanceManual
621BTRACTOR-SCRAPER
MediaNumber-GEG05018-00PublicationDate-01/03/1974DateUpdated-10/10/2001
Foreword
Thisguideisareferenceforthenewoperatorandarefresherfortheexperiencedone.Read-studyandkeepithandy.
Illustrationsguidetheoperatorthroughthecorrectproceduresofchecking,starting,operatingand stoppingthevehicleandattachments.
Operatingtechniquesoutlinedintheguidearebasic.Skillandtechniquesdevelopastheoperator gainsknowledgeofthevehicleanditscapabilities.
Yoursafetyandthesafetyofothersdependsuponcareandjudgmentintheoperationofthisvehicle. Acarefuloperatorisgoodinsuranceagainstanaccident.
Mostaccidents,nomatterwheretheyoccur,arecausedbysomeone'sfailuretoobserveandfollow simpleandfundamentalrulesorprecautions.Forthisreasonmostaccidentscanbeavoidedby recognizinghazardsandtakingstepstoavoidthembeforeanaccidentoccurs.
Regardlessofthecareusedinthedesignandconstructionofanytypeofequipment,thereare conditionsthatcannotbecompletelysafeguardedagainstwithoutinterferingwithreasonable accessibilityandefficientoperation.
Somephotographsinthispublicationmayshowdetailsorattachmentsthatmaybedifferentfrom yourunit.Also,theROPS,forsomephotographs,hasbeenremovedforillustrativepurposes.
Continuingimprovementandadvancementofproductdesignmaycausechangestoyourmachine whichmaynotbeincludedinthispublication.Eachpublicationisreviewedandrevised,asrequired, toupdateandincludethesechangesinlatereditions.
WhenaquestionarisesregardingyourCaterpillarproduct,orthispublication,pleaseconsultyour Caterpillardealerforthelatestavailableinformation.
Copyright1993-2021CaterpillarInc. AllRightsReserved. PrivateNetworkForSISLicensees. SatNov1310:58:11UTC+05302021
Product:WHEELSCRAPER
Model:621BWHEELSCRAPER36V
Configuration:621BSCRAPER36V00001-UP(MACHINE)
OperationandMaintenanceManual
621BTRACTOR-SCRAPER
MediaNumber-GEG05018-00PublicationDate-01/03/1974DateUpdated-10/10/2001
MovingTheTractor-Scraper
Donotmovemachinewithoutnormalairpressure(lowairpressure lightmustbeoff).
1.Besureseatbeltisfastened.
2.MovelevertoEMERGENCYpositionforatleast3secondsbeforemovinglevertoRELEASE. (Seepage26foradditionalinformation.)
3.Depressbrakepedal.Pulllevertoraisebowl.
NOTE:Itispossibletostarttheenginewhenthetransmissionselectorleverisinotherthan NEUTRAL,butthemachinewillnotmove.Shouldthishappen,movetheselectorleverto NEUTRAL,thentothedesiredspeedrange.
4.PushandturntransmissionsafetylocktoOFF.Pulltransmissioncontrollevertodesiredspeed.
5.Releasebrakepedal.Depressacceleratorpedal.
Parking/EmergencyBrakeSystem
1.Ifparkingbrakedoesnotrelease,movelevertoEMERGENCYposition.Pushgovernoroverride buttontoraiseairpressureto150PSI(10,5kg/cm2).
2.ReleaseoverridebuttonandmovelevertoRELEASE.
EmergencyStops
Iflowairpressurewarninglightcomeson,oremergencywarninghornsounds,stopthemachine immediately.
Tostopmachineiftheservicebrakesdonot;pushemergencybrakelevertoEMERGENCYposition.
Brakeswillautomaticallyapplyifairpressuredropsbelowsafe operatingpressure.
Ifthetractor-scraperisstoppedonasteepgradebytheemergency system,donotreleasebrakes.
Afteranemergencystop,waituntilairpressuregaugeregisters NORMALbeforemovingthetractor-scraper.Ifairpressuregaugewill notregisterNORMAL,haveairsystemchecked.
NOTE:Inanemergencythetractor-scrapercanbemovedinfirstgearwiththeemergencybrake applied.Checkconditionofbrakesbeforeoperatingmachineagain.
ChangingGearSpeedandDirection
Machinemustbestoppedandengineatlowidlebeforepushingtransmissioncontrolleverinto REVERSE.
First,secondandreversespeedsareconverterdrive,andareselectedmanually.
Selecthighestusablespeed.Transmissionwillautomaticallyupshiftordownshiftbetweensecondand theselectedspeedduringoperation.
NOTICE
Neverdownshiftwithenginespeedabove1700RPM.Downshiftonly onespeedatatime.
DepressTransmissionHoldpedaltokeeptransmissionfromupshifting.Pedalmaybeusedwhen enteringacurve,approachingagrade,duringloadingorwhilespreading.
Improperdownshiftingcancausesuddenreductionintravelspeed.
Usehydraulicretardersand/orservicebrakestoreducespeedbefore enteringsharpturns,fillareasanddowngrades.
DonotmovetransmissioncontrollevelwithtransmissionHOLD applied.
Nevercoastdowngrade.Keeptransmissionengaged.
Copyright1993-2021CaterpillarInc. AllRightsReserved. PrivateNetworkForSISLicensees.
SatNov1311:00:00UTC+05302021
Product:WHEELSCRAPER
Model:621BWHEELSCRAPER36V
Configuration:621BSCRAPER36V00001-UP(MACHINE)
OperationandMaintenanceManual
621BTRACTOR-SCRAPER
MediaNumber-GEG05018-00PublicationDate-01/03/1974DateUpdated-10/10/2001
OperatingAdjustments Apron
Adjustaprontoclosecompletelywhenoperatinginloosematerial,suchassand.
Adjustapronformaximumopeningforeasierdumpingofheavymaterial.
1.Blockbowlandapron.
2.Removeboltandshaftassembly.
3.Alignrodendwithalternateholeinbracket.
4.Installshaftandbolt.
5.Removeblocks.
Copyright1993-2021CaterpillarInc. AllRightsReserved. PrivateNetworkForSISLicensees.
SatNov1311:00:24UTC+05302021
Product:WHEELSCRAPER
Model:621BWHEELSCRAPER36V
Configuration:621BSCRAPER36V00001-UP(MACHINE)
OperationandMaintenanceManual
621BTRACTOR-SCRAPER
MediaNumber-GEG05018-00PublicationDate-01/03/1974DateUpdated-10/10/2001
OperatingTechniques
Loading
1.Reducetravelspeedanddownshiftwhenapproachingcut.Moveejectortotherear.PushcushionhitchlevertoLOCKDOWN.
2.Openapronandlowerbowltodesireddepthofcut.Shifttransmissionto1stor2ndspeed.
3.Regulateapronopeningtokeepmaterialfrompilinginfrontofliporfallingoutofbowl.
4.Decreasedepthofcutifenginelugsbelowoperatingrange.Closeapronandraisebowltofinish cut.
Raiseandlowerbowlrapidlytopumpinloosematerial.Whenfinishinginloosematerial,raisebowl slightly,closeapronpartially,thenraisebowl.
PushLoading
1.Keepmovingwhilepushertractorismakingcontact.Pushcushion-hitchlevertoLOCKDOWN.
2.Keeptractorandscraperinlineforefficientpushloading.
3.Cutdeepaspossiblewithoutstallingtractor-scraperandpusher.
5.Allowpushertohelpmachineoutofcutareainpoorunderfootconditions.
6.Upshiftandacceleratetohaultravelspeedasquicklyaspossible.PushhitchlevertoCUSHION RIDE.
Hauling
1.MovehitchcontroltoCUSHIONRIDE.Carrybowljusthighenoughtoclearobstructions.
2.Travelathighestspeedpracticalonlevelground.
NOTICE
Watchforandobeyflagmenintraveledareas.
This is the sample of the manual Click on the download link for complete Manual
