Paccar PX-7, Operator'S Manual

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engine lamp is to warn the operator of an
impending idle shutdown. When the idle
shutdown timer is 30 seconds from
expiring, the ECM begins flashing the
check engine warning lamp once per
second. When the timer expires, the ECM
will turn off the warning lamp and shut
down the engine.
Engine is Overheating
CAUTION
The cooling system may overheat if
the engine coolant is at the minimum
level. A sudden loss of coolant,
caused by a split hose or broken hose
clamp could also lead to an overheat
condition. Always inspect to ensure
hoses and clamps are not cracked,
worn, or loose. Failure to comply may
result in equipment or property dam-
age.
NOTE
The system may also temporarily over-
heat during severe operating condi-
tions such as:
•
Climbing a hill on a hot day
• Stopping after high-speed/high-
load driving
• Debris blocking air flow through
the cooling module (radiator)
If the engine coolant temperature warning
lamp comes on and the audible alarm
sounds showing an overheat condition, or
if you have any other reason to suspect the
engine may be overheating, DO NOT
TURN OFF THE ENGINE unless a low
water warning device indicates a loss of
coolant.
Follow these steps if the engine coolant
temperature is rising, or the temperature is
already above normal, and there are no
other warning alarms displayed in the
instrument cluster.
NOTE
The instrument cluster gauges may
appear, if hidden from view, change
brightness and change color to bring
attention to a particular system.
1. Reduce engine speed, or stop.
When stopped, place the
transmission in neutral (N) and set
the parking brake. Keep the engine
running. See the vehicle operator's
manual for instructions on
transmission shifting and parking
brake information.
ENGINE OPERATION - Emergency - What To Do If
12 Y53-1183-1G1 (05/19)
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