M977 and M985 Operating Procedures (Cont)
Position towing vehicle so coupler hook is alined with
trailer connecting eye.
(9.1) Disengage swivel lock (7.1).
(9.2) Lift indicator lock (7.2) away from hook lock (7.3) on coupler (7.4).
(9.3) Push outward on hook lock catch (7.5) and pull on hook lock (7.3) at
same time to release coupler hook (7.6).
Do not put hands near coupler hook while alining
trailer connecting eye with coupler hook. If toting
vehicle moves suddenly it may cause serious injury to
(9.4) Soldier A and Soldier B adjust position of connecting eye (4) while
Soldier C slowly backs up towing vehicle.
(9.5) Connect trailer connecting eye (4) to coupler hook (7.6). Coupler
closes and locks.
(9.6) Secure hook lock (7.3) with indicator lock (7.2).
(9.7) Pull towing vehicle forward slightly to verify that coupler hook (7.6)
has locked in position.