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Peterbilt 387 - Water Temperature Gauge

Peterbilt 387
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PART 4: CONTROLS AND DISPLAYS GAUGES
(R10/06) Y53-6007 – 45
If your oil pressure suddenly drops while you are driv-
ing, bring the vehicle to a stop as soon as possible in
a safe location off the road and turn off the engine.
Wait a few minutes to allow oil to drain into the oil pan,
and then check the oil level. Add oil if necessary. If the
problem persists, contact an authorized service cen
-
ter.
Water Temperature Gauge
11242A
The water temperature gauge shows the temperature of
the engine coolant. Under normal operating conditions the
water temperature gauge should register between 165°
and 210° - 225° F (99° and107° C), depending on the
engine. Under certain conditions, somewhat higher tem
-
peratures may be acceptable. But the maximum allowable
temperature is 225° F (107° C) with the cooling system
pressurized, except for certain special engines. Check
your engine manual to be sure.
Engine Overheating
WARNING! Do not remove the radiator fill cap
while the engine is hot. Scalding steam and
fluid under pressure may escape and cause
serious personal injuries. You could be badly
burned.
Wait until the coolant temperature is below
122°F (50°C).
Protect face, hands, and arms by covering
the cap with a large, thick rag to protect
against escaping fluid and steam.
Carefully and slowly turn the cap one-quar-
ter of a turn or until it reaches the first stop
(allowing excess pressure to escape) push
down and turn for final removal.

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