General Description, Air Actuated Uncoupling

P4 DM Ch21; CasGen5 DM Ch20

A dash-mounted kingpin release switch (if equipped) may be used to uncouple the trailer. See Fig..

Fig. 1, Kingpin Release Switch

Note: In the event of an air system failure, air-actuated kingpins can be manually released following the instructions for manual unlocking.

Warning: Once the kingpin release switch has been pushed, the kingpin lock is released. The vehicle MUST NOT be driven with the trailer until the trailer has been uncoupled and coupled again. Failure to do so may result in separation of the trailer from the tractor, possibly causing serious personal injury or death.

Note:
Parent topic: Air-Actuated Uncoupling
Document Number: 0000112048
Manual Publication Date: 2024-05-03
Topic Publication Date: 2025-03-07