TM 9-2320-209-20-3-3 18-22. GATE VALVE REMOVAL AND REPLACEMENT (TRUCKS M49A1C AND M49A2C). 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. TOOLS: 3/4-inch wrench (2) SUPPLIES: Gate valve gaskets (2) PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal. FRAME 1 1. Using wrenches, unscrew and take out four screws (1) and nuts (2) from flange (3) on left side of gate valve (4). 2. Do step 1 again for the four screws and nuts on flange (3) on right side of gate valve (4). 3. Take away gate valve (4) and two gaskets (5). END OF TASK 18-90