TM 9-2320-209-20-3-2 13-29. AIR RESERVOIRS REMOVAL AND REPLACEMENT (TRUCK M764). TOOLS: 13/16-inch wrench 5/8-inch wrench 9/16-inch wrench (2) 3/4-inch wrench 7/8-inch wrench SUPPLIES: None PERSONNEL: TW O EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedures. (1) Vent air system pressure. Refer to para 13-20. (2) Remove spare tire. Refer to TM 9-2320-209-10. b. Removal. (1) Left side air tank. FRAME 1 1. Working on top of air reservoir (1) using 5/8-inch wrench, unscrew two coupling nuts (2). 2. Working at front of air reservoir (1) and using 7/8-incli wrench, unscrew coupling nut (3). 3. Using 9/16-inch wrenches, unscrew and take off two capscrews (4) and lock- nuts (5). Take off retaining strap (6). GO TO FRAME 2 13-217