TM 9-2330-398-10
2-14. UNCOUPLING SEMITRAILER FROM PRIME MOVER (continued).
6.
Open drain valves (9) on front and rear reservoirs (8 and 10).
7.
Release landing gear operating crank (12) from clip (13), and engage crank (12) on shaft (11).
8.
Rotate crank (12) counterclockwise to lower landing gear (14) until shoes (4) are firmly on the ground or ground
boards (1).
9.
Replace crank (12) in clip (13) and secure.
10.
Pull out lockjaw handle to release semitrailer kingpin from prime mover's fifth wheel hook. If hook is binding and
will not release, pull hook harder to force release.
11.
Drive prime mover forward until semitrailer is disengaged from prime mover and is resting on semitrailer's landing
gear (14).
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