TM 9-2320-209-34-2-3 18-6. REAR WINCH DRIVE CHAIN REMOVAL, REPLACEMENT, AND ADJUSTMENT (TRUCK M764). TOOLS: No special tools required SUPPLIES: Cotter pin (2) PERSONNEL:Two EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal. FRAME 1 Soldier A 1. Working under truck, take off four nuts (1) and screws (2). 2. Take off four nuts (3) and screws (4). Soldiers 3. Take out earth boring machine propeller shaft (5). A and B GO TO FRAME 2 18-154