Module 3: Coupling and Uncoupling
Sliding Procedure
SLIDE ADJUSTMENT
Under no circumstances should a sliding fifth wheel be repositioned while the tractor and trailer are in motion. This could result in serious personal injury or death.
Do not attempt to slide the fifth wheel until all persons are clear of the vehicle.
Note: The fifth wheel must be in the locked position when changing slide positions.
To position an air sliding fifth wheel:
1. Set the trailer brakes.
2. Unlock the cab control air valve and allow the air cylinder to retract the locking wedges.
3. Ease the tractor forward or backward to move the fifth wheel to the desired position.
4. Lock the air valve.
After the fifth wheel is properly positioned, inspect the locking wedges to ensure that they are fully engaged in the slide rail pockets.
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