Air Slide Operation
The slide feature may be operated with a dash-mounted air-slide switch that operates an air cylinder that locks and unlocks the slide. See Fig..
Fig. 1, Air-Slide Switch
- Set the air-slide switch to SLIDE. See Fig..
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Locking Wedge
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Air Cylinder
Fig. 2, Air-Operated Sliding Fifth Wheel, Fontaine
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Unlocked
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Locked
Fig. 3, Jost Sliding Fifth Wheel
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- Lower the trailer landing gear just enough to remove the weight from the vehicle.
- Pull the red trailer air supply knob to set the trailer parking brakes.
- Slowly move the vehicle forward or backward until the fifth wheel is in the desired location.
- Apply the vehicle parking brake.
- Set the air-slide switch to LOCK. Visually inspect the
locking wedges or plungers to make sure that they are fully inserted
in the slide rail slots. Verify that the plungers have engaged by
tugging the vehicle forward while the trailer brakes are locked and
the tires are chocked.
Note: The fifth wheel may need to be moved slightly to enable the locking wedges to fully lock.
Notice: Ensure the trailer landing gear does not come in contact with the vehicle frame or other components, and that the front of the trailer will not come in contact with the rear of the cab or other components if they extend beyond the rear of the cab.
Warning: Check that the locking wedges have seated in the slots. Failure to achieve complete lockup may allow disengagement of the tractor from the trailer, possibly resulting in serious personal injury or death.