Air Slide Operation
The slide feature may be operated with a dash-mounted switch that operates an air cylinder that locks and unlocks the slide.
- Press the top half of the air-slide switch to enable the air-slide feature. See Fig..
- Lower the trailer landing gear just enough to remove the weight from the tractor.
- Pull the trailer air supply knob to set the trailer parking brakes.
- Slowly move the tractor forward or backward until the fifth
wheel is in the desilocation.
Fig. 1, Air Slide Switch
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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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- Set the tractor parking brake.
- Press the lower half of the air-slide switch to disable
the air-slide feature. 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 tractor 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 tractor 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.