TM 9-2320-360-10
(12) Continue backing slowly until fifth wheel jaws (12) lock around kingpin (10) on trailer.
NOTE
Light should not show between top of fifth wheel plate and bottom
of trailer when kingpin is properly locked in fifth wheel.
(13) Inch HET Tractor forward to check coupling and rock tractor back and forth until kingpin
(10) is locked in fifth wheel (2).
(14) Put HET Tractor transmission in N (neutral) position and set parking brake in cab when
kingpin is locked.
(15) Check that primary lock release handle (6) and secondary lock release handle (5) are in
locked position.
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