Fontaine and Holland Fifth Wheels Air-Activated Kingpin Unlock

SD DM 17.02.04
  1. Verify that both the yellow parking-brake and red trailer-air supply knobs are out, the tractor and trailer parking brakes are set, and that the trailer is prepared for uncoupling.

    2. Note: On Fontaine and Holland fifth wheels, if the tractor parking brake is not set, the air-actuated kingpin-release valve will not activate.

  2. Pull and hold the kingpin release valve (see Fig.) until the kingpin lock mechanism opens and locks in place.

    Fig. 1, Air-Actuated Kingpin Release Valve

  3. Release the pull valve.
  4. Release the tractor parking brake.
  5. Drive out from under the trailer.
Note:
Parent topic: Fifth Wheel Uncoupling
Document Number: 0000123489
Manual Publication Date: 2025-01-23
Topic Publication Date: 2025-01-23