Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...
Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...
Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...
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PART 4: CONTROLS AND DISPLAYS<br />
By placing the switch in the unlock position, you can slide<br />
the fifth wheel to various positions to adjust weight distribution.<br />
There is a guard over this switch to protect you against<br />
accidentally activating or releasing the lock.<br />
Parking Brake Valve and Trailer Air Supply Valve<br />
Parking Brake Valve and Trailer Air<br />
Supply Valve<br />
WARNING! Do not move the fifth wheel while<br />
the tractor-trailer is in motion. Movement of the<br />
fifth wheel while a tractor-trailer is moving can<br />
cause a serious accident. Your load could shift<br />
suddenly, causing you to lose control of the vehicle.<br />
Never operate the vehicle with the switch<br />
in the unlock position. Always inspect the fifth<br />
wheel <strong>after</strong> you lock the switch to be sure the<br />
fifth wheel is engaged.<br />
02908<br />
Single Valve<br />
Your parking brake valve is a yellow diamond-shaped knob<br />
located on the right-hand control panel. It controls the parking<br />
brakes for either straight truck or tractor-trailer combinations.<br />
• At a right-hand drive station, a second single valve is<br />
located on the dash to the left of the steering wheel.<br />
R(08/<strong>07</strong>) Y53-6015 – 35 –
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