TM 9-2320-360-10
2-18. TRAILER CONNECTION/DISCONNECTION (FIFTH WHEEL)(CONT)
NOTE
If lock release handles cannot be moved, set trailer brakes and
move HET Tractor slight backward to relieve pressure on lock
mechanism.
(7) Pull primary lock release handle (4) and hook in out position.
(8) Pull secondary lock release handle (5) on side of fifth wheel and hook in out position.
(9) Push PARKING BRAKE control (2) in cab (6) to release parking brake.
(10) Pull out TRAILER AIR SUPPLY button (7).
(11) Drive HET Tractor forward slowly approximately 1 ft (0.305 m) until king pin is clear of lock
mechanism.
(12) Pull out PARKING BRAKE control (2) to apply parking brake.
(13) Raise trailer gooseneck (8) off fifth wheel (TM 9-2330-381-14&P).
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