OPERATOR'S MANUAL
Table Of Contents
OPERATINGTHEBRAKESYSTEM
WARNING
Donotrelyonyourautomatic
transmissionhydraulicretarderto
stopyourvehicle.Ifyourengine
shutsdown,thevehicle’sretarder
willceasetooperatewhichmaylead
toanaccidentinvolvingdeathor
personalinjury.Alwaysbereadyto
suddenlyapplytheservicebrakes.
ParkingBrake
1.NormalRunPosition
2.TrailerParkWithVehicle
Released
3.SystemParkorTrailer
ChargeWithVehicleParked
Parkingbrakesworkinreverseaction
oftheregularbrakes.Whenthe
parkingbrakesareengaged,airis
exhaustedfromthespringchambers
whichallowthespringtoengagethe
brakes.Thisdesignalsoprovidesfor
thesafetyfunctionifabrakecircuit
hasaleakandlosesair.Insucha
scenario,theparkingbrakeswillapply.
Thevehicle’sparkingbrakecontrols
aretheyellowdiamondshapedknob
onyourdashboard.Ifthevehicleis
equippedtotowatrailer,thentherewill
beanadditionalredoctagonshaped
knobforthetrailerparkingbrakes.
Parkingbrakeswillbeengagedwhen
eitheroftheseknobsarepulledOUT.
(Ifoneknobispulledout,theother
knobwillautomaticallypopout.)
PushingINaknobwilldisengage
therespectiveparkingbrakes.Ifyou
pushintheyellowknobonly,you
willdisengagethevehicle’sparking
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