a. Bolster Logging Truck (M815) (Contd).
Air valve half couplings are used to connect air supply.
Airbrake hand control lever is used to control braking on a towed vehicle or
semitrailer independently. When moved down, applies brakes; when moved up,
Transfer power takeoff control lever is used to power midships winch.
b. Medium Wrecker (M816) and Tractor Wrecker (M819).
Power divider control lever is used to power hydraulic crane or rear winch.
Power divider control lever lock prevents power divider control lever from being
placed in engaged position.