TM 9-2320-209-20-3-1 7-57. GROUND STRAPS REMOVAL AND REPLACEMENT. TOOLS: 9/16-inch wrench 1/2-inch wrench 7/16-inch wrench SUPPLIES: None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal. (1) Front ground strap. 1. Using 9/16-inch wrench, unscrew and take off locknut (1) and washer (2). 2. Using 7/16-inch wrench, loosen capscrew (3). Take off ground strap (4). END OF TASK 7-217