Navistar ProStar+ - Scheduled Maintenance

MaintenanceInstructions
NormalMaintenance
Duringoperation,theairandoilinsidethehub/wheelcavity
expands.Itisnormalforamistofoiltobepresentontheoutside
ofthehubcaparoundtheventslitorhole.Overtime,ifnotwiped
off,thislmmaycollectdustandappearunsightly.Iftheentire
faceandendofthehubcapbecomewetwithoil,investigatethe
cause.RefertotheServiceManualforrepairprocedures.
Routinelycleanthehubcaptoensurethatthelubricantlevel
canbeeasilyobservedthroughtheclearwindowasintended.
Insituationswherethewindowiscleanontheoutsidebut
discoloredontheinside,checkthelubricantlevelbyremoving
therubberll/ventplugandinsertangerintothehole.
ThespeciedlubricantlevelforInternational
®
clearwindowtype
hubcapsisfromtheminimumlineto5/16inch(.8cm)abovethe
minimumline.
Ifthelubricantlevelsuddenlydropsdramaticallybelowthe
minimumlevel,seetheServiceManualfordiagnosticprocedure.
Alignment
Maintainingfrontaxlealignmentisveryimportanttoachieving
maximumtirelifeandvehiclecontrol.Inspectingsteeraxletires
intherst3,000miles(4,828km)to10,000miles(16,094km)
willgenerallyshowiftiresarewearingnormally.
•Rapidoutsideshoulderwearonbothtiresindicatestoo
muchtoe-in.
•Rapidinsideshoulderwearonbothtiresindicatestoo
muchtoe-out.
•Excessivewearontheinsideoroutsideofonesteertire
butnottheothercanindicateatoe-inortoe-outcondition
coupledwithamisalignedfrontorrearaxle.
•Pullingtotherightorleftcanindicatemisalignmentofthe
frontorrearaxle,unequaltirepressures,oradamaged/
mismatchedtire.
RefertotheTiressubsectionforadditionalrelatedinformation.
RearAxle
InspectionandLubrication
ChecktomakesurethattherearaxlemountingU-bolts,
attachingormountingboltsandnutsaresecurelytightened.
Looseormisalignedrearaxleswillaffectvehiclealignment,tire
wear,andhandling.RefertoSECTION8—MAINTENANCE
INTERVALSANDSPECIFICATIONSfortorquespecications.
Checktherearaxleoillevel.Properoillevelminimizesgear
wear,heatanddamagetothewheelbearingsandseals.The
oillevelshouldbeattheloweredgeofthelevelinspectionhole
whenthevehicleisonlevelground.Addoilasnecessary.
RefertoSECTION8—MAINTENANCEINTERVALSAND
SPECIFICATIONSforadditionalinformation.
LockingDifferential
Vehicleswhichhavealockingdifferentialhavetheappropriate
operator’smanualsuppliedwiththevehicle.Refertothismanual
formaintenancechecks.
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