MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company

Operating Instructions
• During the time it takes you to drink a cup of coffee, your
engine can cool as much as 60° F (33° C) below normal
operating temperature. To keep the engine warm during
a short break, turn it off. Do not allow your engine to idle
longer than five minutes.
Engine Fan Switch (Option)
Your Model 330 may have an engine fan switch installed as
an option. The switch, which is mounted on the accessory
switch panel, 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 (93°C)
Operating the Engine
WARNING! Do not work on or near the fan with
the engine running. Anyone near the engine fan
when it turns on could be seriously injured. If it
is set at MANUAL, the fan will turn on any time
the ignition key switch is turned to the ON position.
In AUTO, it could engage suddenly without
warning. Before turning on the ignition or
switching from AUTO to MANUAL, be sure no
workers are near the fan.
CAUTION: The fan or equipment near it could be
damaged if the fan turns on suddenly when you
do not expect it. Keep all tools and equipment
away from the fan.
NOTE: Do not operate the engine fan in the MAN-
UAL 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.
Model 330 PB1318 3/01 – 61 –