Navistar ProStar+ - High Current Relay; Electrical Charging and Starting System Test; Terminal Inspection-Cleaning-Corrosion Protection

MaintenanceInstructions
HighCurrentRelay
CAUTION
Topreventpropertydamage,whenservicing
theisolationbattery,besurethatallcables
areconnectedcorrectlytopreventdamage
tothehighcurrentrelayandotherelectrical
components.
1.HighCurrentRelay
2.BatteryBox(Back)
Themainvehicle’sbatteryboxisequippedwithahighcurrent
relaytoisolateonebatteryduringtheautostart/stopcrank
operationandtostabilizepowertoelectricalsystemcontrollers.
ElectricalChargingandStartingSystemTest
AteveryPreventiveMaintenance(PM),fullychargethe
batteriesusinganautomaticoatcharger.Then,havea
qualiedtechnicianperformanelectricalsystemtestusingan
International
®
ElectronicSystemT ester(MidtronicsinTELLECT
EXPHDExpandableElectricalDiagnosticsPlatformavailable
throughyourlocalInternationaldealer)tocatchelectricalsystem
problemsbeforetheycausefurtherdamagetothebatteriesand
preventastrandedvehicle.Thetestwillcheckforalternator
amperageoutput,startercurrentdraw,andbatteryamperage
capacity.Thistypeoftestingwilldetectweaknessesthatmay
notyetbeapparentduringnormaldailyoperations.
TerminalInspection-Cleaning-CorrosionProtection
Periodicallyinspectelectricalconnectorsontheengine,battery,
andframeforcorrosionandtightness.Inspectexposedcables
forfrayingorsignsofabrasion.Exposedterminals,such
ascrankingmotor,alternator,andfeed-throughstudsshould
becleanedandrecoatedwithadielectricgrease,suchas
Fleetrite
®
472141–C1orequivalentpasteorsprayprotectant.
Theinspection/cleaning/corrosionprotectionshouldinclude
feed-throughconnections,powerandgroundcableconnections
forbatteries,engines,andthestarterstud.
Connectorsthataremoresubjecttocorrosionmaybe
disassembledandsprayedinternallywithalightcoatingof
dielectricgrease.Usegreasesparingly,astoomuchgreasewill
notallowairtoescapefromtheconnectionandthiscompressed
airwillpushoutthesealsintheelectricalconnectors.
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