TM 9-2320-386-10 2-94 Change 1 2-42. OPERATION OF AIRBRAKE (TRAILER) KIT (Contd) (1) Remove cotter pin (8), lift lever (5), insert yoke (6) of trailer or artillery load into pintle hook (7) of vehicle, lower lever (5), and install cotter pin (8). (2) Connect load air line (2) to left side service air coupling (1) of towing vehicle. If towed trailer is equipped with spring brakes, connect other load air line from trailer to right emergency side air coupling (not shown). .WARNING. Air shutoff valves must be turned on to charge trailer brake system. Failure to do so may result in trailer brake failure causing injury or death to personnel. (3) Pull up handles (9) to charge trailer brake system. (4) Connect trailer brakelight cable (4) to electric receptacle (3). c. Airbrake Kit Operation. (1) Start engine (para. 2-12) and operate vehicle as necessary. NOTE Airbrake hand control should be engaged slowly to provide steady, even braking. (2) Pull down airbrake hand control (10) to apply brakes of towed load. .WARNING. • Make sure air shutoff valves are turned off after uncoupling trailer. Failure to do so may result in vehicle brake failure causing injury or death to personnel. • Hearing protection is required while towing a trailer or at speeds in excess of 40 mph. 10 1 2 4 3 5 6 7 8 9