TM 9-2320-209-20-3-3 18-24. EMERGENCY RELEASE CABLE REMOVAL AND REPLACEMENT. NOTE Truck M49A1C has three discharge valve controls. Truck M49A2C has two discharge valve controls. This task is the same for both trucks. TOOLS: 5/8-inch wrench 1/2-inch wrench Pliers 8-inch adjustable wrench Leather gloves SUPPLIES: None PERSONNEL: One EQUIPMENT CONDTION: Truck parked, engine off, handbrake set, wheels chocked. 18-94 WARNING Smoking, sparks, or open flame are not allowed within 50 feet of fuel truck during this task. Fuel may burn, causing explosion, injury to personnel, and damage to equipment. Always wear protective gloves when handling cable. Do not let cable slip through hands. Rusty or broken wires can cause injury.