TM 9-2320-209-20-3-1 7-51. LOW AIR PRESSURE BUZZER REMOVAL AND REPLACEMENT. TOOLS: 7/16-inch socket wrench (2) SUPPLIES: None PERSONNEL: TWo EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Removal. FRAME 1 Soldier A 1. Unplug connector (1) from buzzer (2). Soldier B 2. Open engine compartment hood. Refer to TM 9-2320-209-10. 3. Using 7/16-inch wrench, Soldier A 4. Using 7/16-inch wrench, off buzzer (2). END OF TASK hold three screws (3). unscrew three safety nuts (4). Take 7-188