TM 9-2320-361-10 2-26. OPERATION OF FUEL TANK TRUCK (Contd) (10) To drain manifold pipes (16): (a) Fasten hose (17) to gravity delivery line gate valve (15). Refer to f. of this para. (b) Push discharge valve control levers (13) forward, to closed Position. (c) Turn gravity delivery line gate valve knob (14) left, to open position, and drain hose (17) into container (6). When hose (17) is drained, turn knob ( 14) right, to closed position. (d) Remove, drain, and secure hose (17). (11) Remove ground wire (18) from container (6) and secure. h. Emergency Discharging. Do not perform this task with aviation fuel or damage to equipment may result. NOTE This task is to be performed only in emergency situations if fuel fuses are clogged. Clip wire (20), turn handle (19) to open fuel separator by-pass valve, and pump fuel (refer to d. or f. of this para.). 2-117