TM 9-2320-260-10
c. Uncoupling Trailer from Vehicle.
(1) Park trailer and apply vehicle parking brake.
WARNING
Failure to completely turn off air shutoff valves (1) and (4) will
result in loss of vehicle brakes. This may cause injury to personnel.
(2) Completely turn off both service brake air shutoff valve (1) and emergency brake
air shutoff valve (4).
(3) Disconnect intervehicular service brake hose (8), emergency brake hose (5),
electrical cable (2), and safety chains (6).
(4) Remove safety pin (10) and open pintle hook lock (3).
(5) Disconnect lunette yoke (7) from pintle hook (9).
(6) Close pintle hook lock (3), close latch (11) and install safety pin (10).
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