Paccar PX-9 - Page 28

OPERATINGINSTRUCTIONS
functioniscontrolledbyaswitch
locatedonthedashofthevehicle.
Theengine(VGT)exhaustbrake
worksbyretardingenginespeedby
creatinghighexhaustbackpressure.
Thisbackpressureisobtainedby
restrictingairowthroughtheturbine
housingoftheturbocharger.This
restrictionthroughtheturbinehousing
iscreatedthroughpositioningofthe
slidingnozzle(1)locatedinternally
totheturbocharger.Thepositionof
theslidingnozzleiscontrolledby
theengineelectroniccontrolmodule
(ECM).Thisoptionmaynotbe
availableonyourvehicle.
WARNING!
Theexhaustbrakeisnotintended
astheprimarybrakeforthevehi-
cle,norisitanemergencybrake.
Theservicebrakesmustbeused
inanemergency.Relyingsolelyon
theexhaustbraketostoptheve-
hicleinanemergencycouldcause
anaccidentandleadtopersonal
injury.Theexhaustbrakeonly
helpstheservicebrakesbyusing
pressuretoslowthedrivetrain.
Youmustusetheservicebrakes
forquickoremergencystops.Fail-
uretocomplymayresultindeath,
personalinjury,equipmentorprop-
ertydamage.
WARNING!
DONOTusetheexhaustbrake
whenoperatingonsurfacewith
poortraction(suchaswet,icyor
snowcoveredroads).Retarders
cancausethewheelstoskidon
aslipperysurface.Youcouldlose
controlofthevehicleandjacknifeif
thewheelsbegintoskid,resulting
inanaccident.Failuretocom-
plymayresultindeath,personal
injury,equipmentorpropertydam-
age.
3-8Y53-1185-1B1(12/2014)
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