Navistar International LT Series - Automatic Traction Control (ATC) System

Operation
AirGauge,LowAirPressureBeeper,andWarningIndicator
WARNING
Topreventpersonalinjuryand/ordeath,or
damagetoproperty,neveroperatethevehicle
wheninsufcientairpressure(lessthan60psi
[414kPa])isindicatedforeithertheprimaryor
secondaryairsystem.Thevolumeofairrequired
tostopthevehiclemaybegreaterthanthat
available.Havethebrakesystemcheckedand
repairedbeforereturningthevehicletoservice.
Shouldairpressureineithersectionofthesplitairbrake
systembereducedto60-76psi(414-524kPa)thewarning
beeperwillsoundandtheREDBRAKEPRESSUREwarning
indicatorontheinstrumentpanelwillglow.Also,theairgauge
/gaugeswillindicatelowairpressureinatleastoneofthe
independentsystems.ThewarningbeeperandREDindicator
willautomaticallyshutoffwhentheairpressureinbothsystems
issufcient(approximately55-76psi[379-524kPa])to
operatethevehicle.
ShouldtheREDindicatorandbeepernotshutoffsoonafter
startup,theairpressuregauge/gaugesshouldalsoindicate
atleastonesectionofthesplitsystemhaslowairpressure.
IftheREDindicator,beeper,andgaugeindicatealossof
pressurewhiledriving,thevehiclestillhasaportionofthe
brakingcapability,becauseone-halfofthesplitsystembraking
capabilityisretained.However,thedistancerequiredtostop
thevehiclewillbeincreased.
ReservoirMoistureDraining
TheBendix
®
AD-HF
®
airdryerautomaticallydrainsthewettank.
Dailydrainingisnotrequired.
Moisturetakeninwiththeairthroughthecompressorinlet
valvescollectsinthereservoirsandnecessitatesdrainingeach
reservoirperiodically.Thisisdonebyopeningthedraincocks
locatedattheendofalltanks(optionalpull-cableoperateddrain
valvesmaybepresent).Ifthedraincockisopenedintheend
ofthetank,theremustbesomeairpressureinthesystemto
ensureproperdrainage.Besuretoclosethedraincocksafter
allmoisturehasbeenexpelled.
Onvehiclessoequipped,thereservoirautomaticdrainvalve
ejectsmoistureandcontaminantsfromthereservoirinwhichit
isconnected.Itoperatesautomaticallyandrequiresnomanual
assistanceorcontrollinesfromothersources.Thereservoir
shouldbedrainedandthevalveshouldbeexaminedperiodically
toensurethatthedrainpassageisnotobstructed.
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