TM 9-2320-361-10 2-26. OPERATION OF FUEL TANK TRUCK (Contd) WARNING • Keep at least 25 ft (7.6 m) between fuel tank vehicles during fueling operations to avoid congestion. Failure to do so may result in injury or death to personnel. • Fuel tank sections should only be top loaded when bottom loading is not possible. Top loading causes static electricity, which may cause fire, resulting in injury or death to personnel. b. Gravity Filling the Fuel Tank Sections. NOTE Drain compartments and piping system, including filter/separator, when changing to a fuel or grade different from the one last earned. Flush with 50 gallons of new product, and circulate new product back to each compartment twice. Circulate new product through all fuel handling components, including meter, filter/separator, and hose reels when applicable. Get rid of this fuel in the approved area after flushing. (1) Park truck at least 25 ft (7.6 m) from fuel supply. (2) Attach ground wire (7) to suitable ground (task a.1). (3) Ensure discharge valve control levers (6) are pushed forward, to closed position. (4) Turn delivery pump draincock (14), meter drain knob (10), pump delivery line gate valve knob (11), gravity delivery line gate valve knob (2), manual drain valve knob (13), and automatic dump valve knob (12) clockwise, to closed position. (5) Remove fuel level gage (1). Change 2 2-105