TM 9-2320-209-20-3-4 23-7. FUEL BURNING PERSONNEL HEATER EXHAUST TUBE AND CLAMPS REPAIR. TOOLS: 1/2-inch wrench (2) 6-inch pliers. SUPPLIES: None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedure. Open hood and left side panel. Refer to TM 9-2320-209-10. b. Removal. WARNING Hot exhaust tube can cause serious burns. Let it cool before starting task. FRAME 1 1. Using 1/2-inch wrenches, unscrew and take off three screws and nuts (1) from three clamps (2). Spread clamps open and take them off. GO TO FRAME 2 23-13