TM 9-2320-209-20-3-1 6-10. COOLING SYSTEM SERVICE. TOOLS : 9/16-inch wrench (2) 6-inch pliers Scraper Flat-tip screwdriver Flushing gun 5-gallon container (2) SUPPLIES : Cleaning kit (2) Preformed hose Coolant Compressed air source, 30 psi max Heavy cloth Rubber gloves Thermostat housing gasket PERSONNEL : One EQUIPMENT CONDITION : Truck parked, engine off and cool, handbrake set. . Preliminary Procedure. Open hood and right side panel. Refer to TM 9-2320-209-10. 6-49