Paccar PX-9 - Page 29

OPERATINGINSTRUCTIONS
WARNING!
DONOTuseanexhaustbrake
whendrivingbobtailorwithanun-
loadedtrailer.Theremaynotbe
enoughweightontherearaxleto
providetraction.Thiscouldcause
alossofcontrolandjackknifere-
sultinginaninjuryaccident.Make
suretheexhaustbrakeisswitched
“OFF”whenbobtailingorwithan
unloadedtrailer.Failuretocom-
plymayresultindeath,personal
injury,equipmentorpropertydam-
age.
NOTE
Whentheengine(VGT)exhaust
brakeswitchisinthe“ON”posi-
tion,theengine'selectroniccontrol
module(ECM)monitorsinputs
(suchasacceleratorpedalposition
andenginespeed).Fromthesein-
puts,theECMdetermineswhento
enabletheengine(VGT)exhaust
brakefeaturewhentheproper
brakingconditionsarepresent.
Otherfeatures/switcheslikecruise
control,canalsoaffectwhenthe
engine(VGT)exhaustbrakeactivates.
Formoreinformationonhowthe
engine(VGT)exhaustbrakefunctions,
refertovehicleoperationmanualor
contactaPACCARAuthorizedRepair
Location.
WARNING!
Toreducethepossibilityofper-
sonalinjuryorpropertydamage,
alwaysbepreparedtousetheve-
hicleservicebrakesforemergency
stopping.Thesafecontrolspeed
ofavehiclewillvarywiththesize
oftheload,thetypeofload,the
grade,andtheroadconditions.
Failuretocomplymayresultin
death,personalinjury,equipment
orpropertydamage.
NOTE
Theexhaustbrakecanonlybeac-
tivatedwhentheacceleratorpedal
isatits“low-idle”position.Withthe
throttleat“low-idle”position,fuel-
ingcommandstothecylinderswill
notdetractfromthebrakingpower
ofthebrakesystem.
(12/2014)Y53-1185-1B13-9
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