M983 Tractor Operating Procedures (Cont)
If tractor is equipped with crane, go to step (12).
Pull out secondary lock release handle (12) and hook in out position.
Pull primary lock release handle (13) completely out.
Drive tractor forward slowly for approximately 4 ft (1.2 m) and stop.
Check clearance between kingpin and rear frame crossmember of
tractor. Adjust trailer height as needed by lowering landing gear, if
kingpin will catch on crossmember.
Drive tractor forward slowly until semitrailer is clear of tractor and
semitrailer landing gear is on ground.
Soldier A checks semitrailer kingpin to be sure kingpin clears rear
frame crossmember while Soldier B drives vehicle forward [para