Air-Activated Kingpin Unlock

m2+ d 17.03.003

Note:  The kingpin release will not activate if the vehicle is moving, the parking brake is not set, or if the switch is pushed for less than 3 seconds. Unless all of these conditions are met, the trailer will not be uncoupled.

If the kingpin release switch is pressed for less than 3 seconds, see Fig. will appear on the driver display. Press the back arrow to dismiss the popup.

Fig. 1, Kingpin Release Not Activated Popup, ICUC

  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. Push and hold the kingpin release switch, shown in Fig., for a minimum of 3 seconds. The system will apply air for 20 to 30 seconds to ensure the kingpin unlocks. When the kingpin is unlocked, a notification is displayed as shown in Fig.
  3. Release the tractor parking brake.
  4. Drive out from under the trailer.

    Fig. 2, Kingpin Release Alert Screen, ICUC

    Fig. 3, Kingpin Release Switch

Note:
Parent topic: Fifth Wheel Uncoupling
Document Number: 0000112984
Manual Publication Date: 2024-10-09
Topic Publication Date: 2024-05-06