TM 9-2320-209-20-3-3 18-61. WATER DISCHARGE HOSES, DISPENSER NOZZLE, AND SUCTION STRAINER REMOVAL AND REPLACEMENT (TRUCKS M50A1, M50A2, AND M50A3). TOOLS: Spanner wrench 2 11/16-inch wrench SUPPLIES: None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedure. Open rear compartment doors. b. Removal. FRAME 1 1. Using spanner wrench, unscrew and take off two hoses (1 and 2). 2. Using spanner wrench, unscrew and take off reducer (3). 3. Screw on and tighten two covers (4 and 5) to gate valves (6 and 7). GO TO FRAME 2 18-339