TM 9-2320-209-34-2-3 21-22. DEEP WATER FORDING AIR PRESSURIZING SYSTEM SHUTOFF VALVE REMOVAL AND REPLACEMENT. TOOLS: No special tools required SUPPLIES: None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off and cool, handbrake set. a. Removal. FRAME 1 1. Pull up on each hood hold down latch (1) until it clears each hood catch (2). 2. Push and hold in hood latch (3). 3. Lift hood (4) and let go of hood latch (3). GO TO FRAME 2 21-177