Navistar ProStar+ - Section 8 - MAINTENANCE INTERVALS AND SPECIFICATIONS; Lubrication and Maintenance Intervals

MaintenanceInstructions
Suspension(AirandSteelSprings)
CAUTION
Topreventpropertydamage,donotadjustair
suspensionheighttoanysettingotherthanthe
speciedsetting.Alteringtheheightsetting
willchangethedrivelineangleandmayresult
inunwarrantablecomponentdamage,suchas
transmissioncomponentdamage.
Verifydriveaxleairsuspensionheightatengineoilchange
intervals.SeetheappropriateServiceManual.
NOTE:Suspensionalignmentmustbemaintainedatall
times.
NOTE:RefertoSECTION8—MAINTENANCEINTERVALS
ANDSPECIFICATIONSforproperU-bolttorquevalues.
Periodically:
•Checkconditionofspringleavesforevidenceoffatigue,
bendingorbreakage.
•Checkconditionofsuspensionmountingbracketsand
bushings.
•Checkthatsuspensionmounts(suchasbrackets,
bushings,andfasteners)aretight.
•Checkthattorquerodmountingfastenersaretight.
•CheckU-boltsasfollows:
1.Afterthechassishasbeenoperatingunder
loadfor1,000miles(1,600km)orsixmonths,
whichevercomesrst,theU-boltnutsmustbe
re-torqued.
2.Thereafter,theU-boltnutsmustbere-torqued
every36,000miles(58,000km).Re-torque
intervalmaybeloweredto25,000miles(46,000
km)tosynchronizewithoilchangeinterval.
FrontSuspension
Thefrontsuspensionshouldberegularlyinspectedforloose,
worn,orbrokencomponents.Frontsuspensions/axles
shouldbecheckedperiodicallyforproperalignmenttopromote
maximumtirelife.
Onvehiclesequippedwiththeoptionalfrontairsuspension,the
airsuspensioncomponents,includingairbags,heightcontrol
valves,airlines,andttingsshouldbeinspectedforwear,
damage,andaudibleairleaks.
RearSuspension
Therearsuspensionshouldberegularlyinspectedforloose,
worn,orbrokencomponents.Rearsuspensions/axles
shouldbecheckedperiodicallyforproperalignmenttopromote
maximumtirelife.TheoptionalInternational
®
TruckRide
OptimizedSuspension(IROS)components,includingairbags,
heightcontrolvalves,airlines,andttingsshouldbeinspected
forwear,damage,andaudibleairleaks.
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