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Medium Duty Operator's Manual - Peterbilt Motors Company

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OPERATING THE TRANSMISSION<br />

Release Bearing Wear<br />

When you must idle your engine for any period of time,<br />

shift your transmission to Neutral and disengage the<br />

clutch (take your foot OFF of the pedal). This helps prevent<br />

unnecessary wear to your clutch release bearing,<br />

and it is less tiring for you, too.<br />

Clutch Adjustment<br />

Inspect manual clutches according to the manufacturer's<br />

recommendations. Regular maintenance should be followed<br />

to maintain correct clutch adjustment. Have your<br />

dealer's Service Department perform any adjustment necessary.<br />

Tips<br />

• Always use the clutch when making upshifts or downshifts.<br />

• Always select a starting gear that will provide sufficient<br />

gear reduction for the load and terrain.<br />

• Never downshift when the vehicle is moving too fast.<br />

STARTING AND OPERATING THE VEHICLE<br />

• Never slam or jerk the shift lever to complete gear<br />

engagement.<br />

• Never coast with the transmission in Neutral and the<br />

clutch disengaged.<br />

• To provide smooth gear engagements while shifting,<br />

use proper coordination between shift lever and<br />

clutch.<br />

Operating Automatic Transmissions<br />

An automatic transmission makes shifting much easier,<br />

however it is important to understand how to operate the<br />

transmission efficiently. Please read the transmission<br />

manufacturer’s operation manual supplied with your vehicle.<br />

There may not be a “park” position with your automatic<br />

transmission. Always be sure you apply the parking brake<br />

before leaving the cab.<br />

WARNING! Do not leave the cab of your vehicle<br />

without applying the parking brake. The truck<br />

could roll and cause an injury accident. Always<br />

apply the parking brake before you leave the cab.<br />

– 100 – Y53-6008A <strong>Medium</strong> <strong>Duty</strong> (R05/09)

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