Operating Instructions
– 32 –
Y53-1030A 12/09
PACCAR
Other switches for cruise control that affect engine brake
operations are:
• Service brake air pressure switch (if service brake actua-
tor feature is selected).
• Clutch switch.
• Throttle sensor.
The ECM allows the engine brakes to operate while the
cruise control is turned on.
The two-position selector switch (standard) or three-position
(optional) is located next to the on/off switch in the cab, and
allows you to select the retarding power of one or two brakes.
LOW activates the engine brake on three cylinders, and HI
activates the engine brake on six cylinders.
Signals from the on/off switch, clutch switch, throttle sensor,
and the cruise/PTO switches are fed into the ECM.
NOTE: Any one of these switches can de-activate
the engine brakes.
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 ...
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