Paccar PX-9 - Page 34

OPERATINGINSTRUCTIONS
CAUTION
DONOToperatetheenginebrake
untiltheengineoiltemperatureis
above86°F(30°C).Operationbe-
low86°F(30°C)couldcausese-
veredamagetotheengine.Idle
theenginefourminutesatapprox-
imately1000RPMtowarmtheen-
ginebeforeactivatingtheengine
brakes.
Toactivatetheenginebrakes,switch
the“ON/OFF”switchtothe“ON”
position.Onceactivated,theoperation
oftheenginebrakeisfullyautomatic.
NOTE
Seethe“TipsforOperation”steps
inthissectionforspecicinforma-
tionaboutenginebrakeoperation
undercertainroadconditions.
NOTE
Theenginebrakesaredesignedto
assistthevehicle'sservicebrakes
whenslowingthevehicletoastop.
Remember,servicebrakeswillbe
requiredtobringthevehicletoastop.
CAUTION
Usingtheenginebrakestoaidin
clutchlessgearshiftingwillcause
theenginetostallorleadtoen-
ginedamage.Enginebrakesused
inclutchlessshiftingcausesaddi-
tionalstrainontheenginevalve
trainandcausessevereinternal
enginedamage.DONOTuseen-
ginebrakestoassistingearshift-
ing.
TheECMwilldisabletheengine
brakeswhenenginespeedisbelow
3-14Y53-1185-1B1(12/2014)
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