TM 9-2320-209-20-3-3 18-82. EARTH BORING REPLACEMENT . TOOLS : 3/4-inch 3/4-inch SUPPLIES : None PERSONNEL : One MACHINE DRIVE SHAFT ASSEMBLY REMOVAL AND open end wrench box wrench EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal. 1. Using 3/4-inch open end wrench, hold two nuts (1). Using 3/4-inch box wrench, unscrew and take off two nuts and screws (2). 2. Let end of drive shaft (3) down slowly. 3. Using 3/4-inch open end wrench, hold four nuts (4) . Using 3/4-inch wrench, unscrew and take off four nuts and screws ( 5). 4. Take out drive shaft (3) . END OF TASK 18-438