LiteratureInformation
Thismanualshouldbestoredintheoperator'scompartmentintheliteratureholderorseatback literaturestoragearea.
Thismanualcontainssafetyinformation,operationinstructions,transportationinformation, lubricationinformation,andmaintenanceinformation.
Somephotographsorillustrationsinthispublicationshowdetailsorattachmentsthatcanbedifferent fromyourmachine.Guardsandcoversmighthavebeenremovedforillustrativepurposes.
Continuingimprovementandadvancementofproductdesignmighthavecausedchangestoyour machinewhicharenotincludedinthispublication.Read,study,andkeepthismanualwiththe machine.
Wheneveraquestionarisesregardingyourmachine,orthispublication,pleaseconsultyourCat dealerforthelatestavailableinformation.
Safety
Thesafetysectionlistsbasicsafetyprecautions.Inaddition,thissectionidentifiesthetextand locationsofwarningsignsandlabelsusedonthemachine.
Readandunderstandthebasicprecautionslistedinthesafetysectionbeforeoperatingorperforming lubrication,maintenance,andrepaironthismachine.
Operation
Theoperationsectionisareferenceforthenewoperatorandarefresherfortheexperiencedoperator. Thissectionincludesadiscussionofgauges,switches,machinecontrols,attachmentcontrols, transportation,andtowinginformation.
Photographsandillustrationsguidetheoperatorthroughcorrectproceduresofchecking,starting, operating,andstoppingthemachine.
Operatingtechniquesoutlinedinthispublicationarebasic.Skillandtechniquesdevelopasthe operatorgainsknowledgeofthemachineanditscapabilities.
Maintenance
Themaintenancesectionisaguidetoequipmentcare.TheMaintenanceIntervalSchedule(MIS)lists theitemstobemaintainedataspecificserviceinterval.Itemswithoutspecificintervalsarelisted underthe"WhenRequired"serviceinterval.TheMaintenanceIntervalScheduleliststhepage numberforthestep-by-stepinstructionsrequiredtoaccomplishthescheduledmaintenance.Usethe MaintenanceIntervalScheduleasanindexor"onesafesource"forallmaintenanceprocedures.
MaintenanceIntervals
Usetheservicehourmetertodetermineservicingintervals.Calendarintervalsshown(daily,weekly, monthly,etc.)canbeusedinsteadofservicehourmeterintervalsifthecalendarintervalsprovide moreconvenientservicingschedulesandapproximatetheindicatedservicehourmeterreading. Performtherecommendedserviceattheintervalthatoccursfirst.
Undersevere,dusty,orwetoperatingconditions,morefrequentlubricationthanisspecifiedinthe maintenanceintervalschartmightbenecessary.
Performserviceonitemsatmultiplesoftheoriginalrequirement.Forexample,atevery500service hoursor3months,alsoservicethoseitemslistedunderevery250servicehoursormonthlyandevery 10servicehoursordaily.
CertifiedEngineMaintenance
Propermaintenanceandrepairareessentialtokeeptheengineandmachinesystemsoperating correctly.Astheheavy-dutyoff-roaddieselengineowner,youareresponsiblefortheperformanceof therequiredmaintenancelistedintheOwnerManual,OperationandMaintenanceManual,and ServiceManual.
Itisprohibitedforanypersonengagedinthebusinessofrepairing,servicing,selling,leasing,or tradingenginesormachinestoremove,alter,ortorenderinoperative,anyemission-relateddeviceor elementofdesigninstalledonorinanengineormachinethatisincompliancewithallapplicable regulationsoftheintendedcountrytowhichithasbeenshipped.Certainelementsofthemachineand enginesuchastheexhaustsystem,fuelsystem,electricalsystem,intakeairsystem,andcooling systemmaybeemission-relatedandshouldnotbealteredunlessapprovedbyCaterpillar.
MachineCapacity
Additionalattachmentsormodificationsmayexceedmachinedesigncapacitywhichcanadversely affectperformancecharacteristics.Includedwouldbestabilityandsystemcertificationssuchas brakes,steering,androlloverprotectivestructures(ROPS).ContactyourCatdealerforfurther information.
ProductIdentificationNumber
EffectiveFirstQuarter2001theProductIdentificationNumber(PIN)haschangedfrom8to17 characters.Toprovideuniformequipmentidentification,constructionequipmentmanufacturersare movingtocomplywiththelatestversionoftheproductidentificationnumberingstandard.Non-road machinePINsaredefinedbyISO10261.ThenewPINformatwillapplytoallmachinesand generatorsets.ThePINplatesandframemarkingwilldisplaythe17characterPIN.Thenewformat willlooklikethefollowing:
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Illustration1g03891925
Where:
1.WorldManufacturingCode(characters1-3)
2.MachineDescriptor(characters4-8)
3.CheckCharacter(character9)
4.MachineIndicatorSection(MIS)orProductSequenceNumber(characters10-17).Thesewere previouslyreferredtoastheSerialNumber.
MachinesandgeneratorsetsproducedbeforeFirstQuarter2001willmaintaintheir8characterPIN format.
Componentssuchasengines,transmissions,axles,andworktoolswillcontinuetousean8character SerialNumber(S/N).
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Product:TRUCK
Model:773ETRUCKASK
Configuration:773EOff-HighwayTruckASK00001-UP(MACHINE)
OperationandMaintenanceManual
773EOff-HighwayTruck
MediaNumber-SEBU8394-08PublicationDate-01/02/2015DateUpdated-26/08/2020
AirConditionerFilter-Clean
SMCS-7320-070-FI
Ifareductioninaircirculationisnoticed,cleanthefilterelementfortheairconditioner. Thefilterelementfortheairconditionerislocatedinthecompartmentonthefrontofthecab.
1.Loosenthedoorretainingscrewsandopenthedoor.
Illustration1g00520692
2.Removethefilterelement.
3.Washthefilterelementinanonsudsingdetergent.
4.Rinsetheelementincleanwater.Allowtheelementtoairdry.
5.Installthecleanelement.Tightenthedoorretainingscrews.
i00981882
Note:Whenripsortearsarenoticedinthefilterelement,orareductionofaircirculationisnoticedin thecabaftercleaningthefilter,installanewelement.
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OperationandMaintenanceManual
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AirDryer-Check
SMCS-4285-535
Theairlinestoandfromtheairdryermustbeatatmosphericpressure. Iftheairlinesarenotatatmosphericpressure,personalinjurycould result.Releasetheairpressurefromtheairsystemcompletelybefore performingmaintenance.
Illustration1g00793361
Theairdryerislocatedbehindtherightfrontsuspensioncylinder.
Illustration2g01151714
Theairtankfortheservicebrakeandfortheretarderislocatedontherightplatform.Theparkingand secondarybrakeairtankislocatedinthecompartmentbehindthecab.
Illustration3g01151802
Thedrainvalvefortheairtankoftheservicebrakeandoftheretarderislocatedontherightsideof theairtank.
Thedrainvalvefortheparkingandsecondarybrakeairtankislocatedundertheenginecoveronthe rightsideofthecabnearthewasherfluidbottle.
1.Openthedrainvalvesfortheairtanks.
Note:Smallamountsofmoisturemaybeinthesystemduetointernalcondensation.Moisture mayalsobeinthesystemifanairdryerisinstalledonamachinethathasbeenoperating withoutanairdryer.Severalweeksmayberequiredinordertocompletelyremovethemoisture fromthesystem.
2.Checkformoistureintheairtanks.Closethedrainvalvesfortheairtanks.
3.Ifthereismoistureintheairtanks,replacethedesiccantcartridgeorrebuildthedesiccant cartridge.ConsultyourCaterpillardealerforinformationaboutreplacingthedesiccant cartridgeandforinstructionsforrebuildingthedesiccantcartridge.
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Model:773ETRUCKASK
Configuration:773EOff-HighwayTruckASK00001-UP(MACHINE)
OperationandMaintenanceManual
773EOff-HighwayTruck
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AirDryerDesiccant-Replace
SMCS-4285-510-DSS
Personalinjuryordeathcanoccurifpersonnelaretrappedbetweenthe wheelandtheframe.
Thesteeringsystemishydraulicallycontrolledandwheelscancrush personnelduringmovement.
Usecautionwhenworkingbetweenthewheelsandtheframe.Ifthe wheelsmustbeturned,ensurethatallpersonnelareclearofthe machinebeforeanymovement.
Theairlinestoandfromtheairdryermustbeatatmosphericpressure. Iftheairlinesarenotatatmosphericpressure,personalinjurycould result.Releasetheairpressurefromtheairsystemcompletelybefore performingmaintenance.
Illustration2g00791701
Theairdryerislocatedbehindthefrontwheelontherightsideofthemachine.
Whenthedesiccantcartridgeintheairdryerfailstoabsorbwater,thedesiccantcartridgemustbe rebuiltorthedesiccantcartridgemustbereplaced.
1.Parkthevehicleonalevelsurface.Applytheparkingbrakeandchockthetires.
2.Theoperatormuststoptheenginebeforeworkingaroundthevehicle.Turnthedisconnectkey inordertoremovetheelectricalpower.
3.Draintheairpressurefromallreservoirsbeforeworkisstartedonthevehicle.
Note:Ifthereismoistureintheairreservoirs,replacethedesiccantcartridgeorrebuildthe desiccantcartridge.ConsultyourCaterpillardealerforinformationaboutreplacingthe desiccantcartridgeandforinstructionsforrebuildingthedesiccantcartridge.
Note:Smallamountsofmoisturemaybeinthesystemduetocondensationinthesystem. Moisturemayalsobeinthesystemifanairdryerisinstalledonamachinethathasbeen operatingwithoutanairdryer.Severalweeksmayberequiredinordertocompletelydrythe system.
Illustration3g01081795
4.Loosenbolt(2)thatisonthebottomofairdryer(1).
5.Removebolt(2)fromairdryer(1).
Illustration4g01081799
6.Liftdesiccantcartridge(3)fromairdryer(1).
Illustration5g01081801
7.RemovethetwoO-rings(4)frombolt(2).
8.InstalltwonewO-rings(4)onbolt(2).
9.Installanewdesiccantcartridge(3)ontoairdryer(1).
10.Insertbolt(2)intoairdryer(1).
11.Tightenbolt(2)toatorqueof68N·m(50lbft).
Copyright1993-2025CaterpillarInc. AllRightsReserved. PrivateNetworkForSISLicensees.
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Product:TRUCK
Model:773ETRUCKASK
Configuration:773EOff-HighwayTruckASK00001-UP(MACHINE)
OperationandMaintenanceManual
773EOff-HighwayTruck
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AirTank-Inspect
SMCS-4272-040;5505-040;7428-040
Whenlawsinthemachine'soperatinglocationrequiretheinspectionofairtanks,refertoSpecial Instruction,REHS2398,"AirTankInspectionfortheOff-HighwayTruck769-797".
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Model:773ETRUCKASK
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OperationandMaintenanceManual
773EOff-HighwayTruck
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AirTankMoistureandSediment-Drain
SMCS-4272-543-MAS
Theairtankfortheservicebrakeandfortheretarderislocatedontherightplatform.Thedrainvalve forthistankislocatedrightsideoftheairtank.
Theparkingandsecondarybrakeairtankislocatedbehindthecab.Thedrainvalvefortheairtankis locatedundertheenginecoverontherightsideofthecabnearthewasherfluidbottle.
1.Opentheonedrainvalve.
2.Checkformoistureandsedimentintheairtank.Drainthemoistureandthesedimentfromthe airtankintoasuitablecontainer.
3.Closethedrainvalve.
4.Repeatsteps1through3fortheothertank.
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BackupAlarm-Test
SMCS-7406-081
Thebackupalarmalertsthepersonnelbehindthemachinethatthemachineisbackingup.Thebackup alarmislocatedattherearofthemachine.
1.Parkthemachineonalevelsurfaceandstoptheengine.
2.Makesurethattheareabehindthemachineisclearofpersonnelandclearofobstacles.Make surethattheparkingbrakeisengaged.
3.TurntheenginestartswitchtotheONposition.
Note:Donotstarttheengine.
4.TurnthefanspeedswitchtotheOFFpositionandturnofftheentertainmentradio(if equipped).Openadoororawindow.
5.MovethetransmissioncontroltotheREVERSEpositionandlistenforthebackupalarm.The backupalarmshouldsoundimmediately.Thebackupalarmshouldcontinuetosounduntilthe transmissioncontrolismovedoutoftheREVERSEposition.
a.Ifthemachineisequippedwithanaudio-visualbackupalarm,awarninglightontherear ofthemachinewillflashwhenthetransmissioncontrolisintheREVERSEposition.A separatepersonshouldbepositionedatasafedistancefromtherearofthemachinein ordertocheckforproperoperationofthewarninglight.
6.MovethetransmissioncontroltotheNEUTRALposition.
7.Ifthebackupalarmdidnotfunction,orifthebackupalarmdidnotfunctionproperly,contact yourCaterpillardealer.
Product:TRUCK
Model:773ETRUCKASK
Configuration:773EOff-HighwayTruckASK00001-UP(MACHINE)
OperationandMaintenanceManual
773EOff-HighwayTruck
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Battery-Recycle
SMCS-1401-561
Alwaysrecycleabattery.Neverdiscardabattery.
Alwaysreturnusedbatteriestooneofthefollowinglocations:
•Abatterysupplier
•Anauthorizedbatterycollectionfacility
•Recyclingfacility
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Model:773ETRUCKASK
Configuration:773EOff-HighwayTruckASK00001-UP(MACHINE)
OperationandMaintenanceManual
773EOff-HighwayTruck
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BatteryorBatteryCable-Inspect/Replace
SMCS-1401-510;1401-040;1402-040;1402-510
Note:Whenyoureplacethebatteries,alwaysusethesametypeofbattery.Thismachinerequires MaintenanceFreebatteriesorLowMaintenanceHighOutputbatteries.
1.TurntheenginestartswitchtotheOFFposition.TurnalloftheswitchestotheOFFposition.
2.TurnthebatterydisconnectswitchtotheOFFposition.Removethekey.
3. switch.
Note:Donotallowthedisconnectedbatterycabletocontactthebatterydisconnectswitch.
4.
5.Disconnectthepositiveend"+"ofthebatterycablefromthebattery.
6.Replacethebatteryormakeallnecessaryrepairstothebattery.
7.Connectthepositiveend"+"ofthebatterycabletothebattery.
8. 9. switch.
10.Installthekey.TurnthebatterydisconnectswitchtotheONposition. Copyright1993-2025CaterpillarInc.
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Model:773ETRUCKASK
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773EOff-HighwayTruck
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Belts-Inspect/Adjust/Replace
SMCS-1357-040;1357-510;1357-025
Inspection
i01943359
Tomaximizetheengineperformance,inspectthebeltforwearandforcracking.Checkthebelt tension.Adjustthebelttensioninordertominimizebeltslippage.Beltslippagewilldecreasethelife ofthebelt.
Tocheckthebelttension,refertotheEngineSpecifications,"BeltTensionChart".Acorrectly adjustedbeltwilldeflect13to19mm(0.50to0.75inch).
Note:Thebelttensionfortheenginefanisspringapplied.Thefandrivebeltcannotbeadjusted.If thefandrivebeltisloose,seetheEngineSupplementDisassemblyandAssembly,"FanDriveRemove"forinstructionsonreplacementofthespring.Ifthefandrivebeltiscrackedorworn,refer totheEngineSupplementDisassemblyandAssembly,"FanDrive-Install"forreplacement information.
Adjustment
Alternator
Illustration1g00647560
(1)Adjustingnuts (2)Mountingbolt
1.Ifnecessary,removethebeltguard.
2.Loosenmountingbolt(2)andadjustingnuts(1).
3.Turnadjustingnuts(1)inordertoincreaseordecreasethebelttension.
4.Tightenadjustingnuts(1).Tightenmountingbolt(2).
5.Ifnecessary,reinstallthebeltguard.
RefrigerantCompressor
Illustration2g01017828
Illustration3g01017827
1.Loosentwobolts(3).
2.Loosennut(4).
3.Usenuts(5)toadjustthebelttension.
4.Tightennut(4)andnuts(5).
5.Tightenbolts(3).
Replacement
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