Regional Haul Model Operator's Manual - Peterbilt Motors Company

DASH- AND DOOR-MOUNTED FEATURES
Fifth Wheel Lock (Slider Adjustment) Switch
.
CONTROLS AND DISPLAY
the fifth wheel to various positions to adjust weight distribution.
There is a guard over this switch to protect you
against accidentally activating or releasing the lock.
Parking Brake Valve and Trailer Air Supply
Valve
Before you leave the cab, apply all parking brakes.
FIFTH WHEEL
WARNING! Do not move the fifth wheel while
the tractor-trailer is in motion. Movement of
the fifth wheel while a tractor-trailer is moving
can cause a serious accident involving death
or personal injury. Your load could shift suddenly,
causing you to lose control of the vehicle.
Never operate the vehicle with the switch
in the unlock position. Always inspect the
fifth wheel after you lock the switch to be sure
the fifth wheel is engaged.
Vehicles having an air slide fifth wheel have a fifth wheel
slider lock controlled by a switch on the instrument panel.
By placing the switch in the unlock position, you can slide
1. Apply all parking brakes. Pull out the Yellow Parking
Brake Control knob (1) located on the dash. In tractors,
the Red (octagon-shaped) Trailer Air Supply
Control knob (2) will automatically pop out.
Full Truck Parking Brake Valve
– 62 – Y53-6033 Regional Haul (R05/10)