MODEL 330 OPERATOR'S MANUAL - Peterbilt Motors Company

Operating the Transmission
Release Bearing Wear
When you must idle your engine for any period of time, shift
your transmission to Neutral and disengage the clutch (take
your foot OFF of the pedal). This helps prevent unnecessary
wear to your clutch release bearing, and it is less tiring for
you, too.
Clutch Adjustment
Inspect manual clutches according to the manufacturer’s recommendations.
Regular maintenance should be followed to
maintain correct clutch adjustment. Have your dealer’s Service
Department perform any adjustment necessary.
Tips
• Always use the clutch when making upshifts or downshifts.
• Always select a starting gear that will provide sufficient
gear reduction for the load and terrain.
• Never downshift when the vehicle is moving too fast.
• Never slam or jerk the shift lever to complete gear
engagement.
• Never coast with the transmission in Neutral and the
clutch disengaged.
Operating Instructions
• To provide smooth gear engagements while shifting, use
proper coordination between shift lever and clutch.
Operating Automatic Transmissions
An automatic transmission makes shifting much easier, of
course. But because your truck pulls a heavy load, it is important
to use it efficiently. For correct automatic transmission
operation, also see the transmission manufacturer's Operator’s
Manual.
• On most automatic transmissions there is no “PARK”
position, so you will need to apply the parking brake
before leaving the cab. See page 72.
WARNING! Do not leave the cab without applying
the parking brake. The truck could roll and
cause an injury accident. Always apply the parking
brake before you leave the cab.
The MD Automatic Transmission
The MD (electronic) Series of transmissions have four, five,
or six forward speeds, a Neutral position, and one reverse
speed. Pressing the appropriate button selects the desired
gear—a beep will sound and the mode select window on the
control unit will display the gear selected.
– 68 – PB1318 3/01 Model 330