TM 9-2320-361-10 2-4. CHASSIS CONTROLS AND INDICATORS (Contd) Key 1 2 Key 3 4 5 6 2-8 Item and Function Front Winch Clutch Control Lever is moved to “In” position (toward right side of vehicle) to engage winch, and to “Out” position (toward left side of vehicle) to disengage winch. Front Winch Drum Lock Knob secures drum when winch is not in use. To unlock drum, pull knob out and up. Item and Function Trailer Power Outlet Receptacle provides electric power for trailer. Towing Pintle Hook is opened to attach trailer towing bar. Emergency Air Coupling is connected by an air coupling hose to emergency air coupling of trailer or vehicle to be towed. This connection permits towing vehicle to charge the brake system of trailer or disabled vehicle with air. Trailer Service Air Coupling is connected by an air coupling hose to service coupling of trailer or vehicle to be towed. This connection permits operator to engage brakes of towed load when pressing brake pedal of the towing vehicle.