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Paccar Peterbilt 587 - Engine Fan Switch

Paccar Peterbilt 587
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DASH-MOUNTED FEATURES PART 4: CONTROLS AND DISPLAYS
– 46 – Y53-6032 (R05/10)
Engine Fan Switch
The engine fan switch allows you to control the engine fan
manually or automatically. With the ignition key switch ON
and the fan switch in the ON position, the engine fan will
be on regardless of engine temperature. With the engine
fan switch in the AUTOMATIC position, the engine fan will
automatically turn on when the engine coolant reaches a
temperature of about 200
°F.
WARNING! Do not work on the fan with the
engine running. Anyone near the engine fan
when it turns on could be killed or seriously
injured. If it is set at ON, it will turn on any
time the ignition key switch is turned to the
ON position. In AUTOMATIC, it could engage
suddenly without warning. Before turning on
the ignition or switching from AUTOMATIC to
ON, be sure no one is near the fan.
CAUTION: The fan or equipment near it could be
damaged if the fan turns on suddenly when you
don’t expect it. Keep all tools and equipment
such as rags away from the fan, and take care no
one turns on the ignition when someone is
working near the fan.
CAUTION: Do not operate the engine fan in the
manual (ON) position for extended periods of
time. The fan hub was designed for intermittent
operation. Sustained operation will shorten the
fan hub’s service life as well as reduce fuel
economy.
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Y53-6032.book Page 46 Monday, May 24, 2010 3:37 PM

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