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Operating Instructions
PACCAR
Y53-1030A 12/09
– 35 –
To activate the engine brakes, switch the on/off switch to the
ON position. Once activated, the operation of the engine
brake is fully automatic.
NOTE: See the “Tips for Operation” steps in this
section for specific information about engine brake
operation under certain road conditions.
NOTE: The engine brakes are designed to assist
the vehicle's service brakes when slowing the vehi-
cle to a stop.
Remember, service brakes will be required to bring the
vehicle to a stop.
CAUTION: Using the engine brakes to aid in
clutchless gear shifting will cause the engine to
stall or lead to engine damage. Engine brakes
used in clutchless shifting causes additional
strain on the engine valve train and causes
severe internal engine damage. Do not use
engine brakes to assist in gear shifting.
The ECM will disable the engine brakes when engine speed
is below 850 rpm or when an electronic fault code is active.
Summary of Contents for PX 8
Page 1: ......
Page 2: ......
Page 3: ...Y53 1030A 12 09 Operator s Manual ...
Page 6: ...Foreword ...
Page 16: ...Introduction 10 Y53 1030A 12 09 PACCAR ...
Page 50: ...Operating Instructions 44 Y53 1030A 12 09 PACCAR ...
Page 58: ...Maintenance Guidelines 52 Y53 1030A 12 09 PACCAR ...
Page 60: ...Service Literature 54 Y53 1030A 12 09 PACCAR ...
Page 78: ...Maintenance Specifications 72 Y53 1030A 12 09 PACCAR ...
Page 93: ......
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