Paccar PX-9 - Page 31

OPERATINGINSTRUCTIONS
CompressionBrakeSystem
Theamountofbrakingpoweravailable
inagivenengineseriesvaries.Braking
powerdependsonturbochargerboost
pressure,enginespeed,compression
ratio,injectortiming,andwhenthe
enginebrakesopentheexhaust
valves.
Enginebrakecontrols,withthefuel
system,consistsofthefollowing:
•Atwo-positionselectorswitch
standard(three-positionselector
optional).
•AnON/OFFswitch.
•Aclutchswitch.
•Athrottlesensor.
WiththeON/OFFswitchinthe“ON”
position,thebrakeautomatically
createsitsbrakingeffectwhenyou
removeyourfootfromtheaccelerator
pedal.
(12/2014)Y53-1185-1B13-11
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