Operating Instructions
– 22 –
Y53-1030A 12/09
PACCAR
NOTE: If the “Engine Coolant Temperature” warning
light comes on and the audible alarm sounds show-
ing an overheat condition, or if you have any other
reason to suspect the engine may be overheating,
DON'T TURN OFF THE ENGINE unless a low water
warning device indicates a loss of coolant. Follow
these steps:
• Reduce engine speed or stop. When stopped,
place the transmission in Neutral and set the park-
ing brake. See the Truck Operator’s Manual for
instructions on transmission shifting and parking
brake information.
• Check to ensure that the oil pressure gauge reads
normal.
• Increase the engine speed to about one–half of
full operating speed, or 1,100 to 1,200 rpm, maxi-
mum.
• Return the engine speed to normal idle after two
or three minutes.
• Monitor the engine temperature. After the temper-
ature returns to normal, allow the engine to idle 3
to 5 minutes before shutting it off. This allows the
engine to cool gradually and uniformly.
• If the overheating came from severe operating
conditions, the temperature should have cooled by
this time.
• Check the sight gauge (glass level indicator) on
the side of the coolant expansion tank.
CAUTION: Never leave the engine idling when
the vehicle is unattended. If the engine should
overheat, immediate action is required to correct
the condition. Failure to take immediate action
may result in serious engine damage. If you
must leave your vehicle unattended, shut down
the engine.
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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