TM 9-2320-361-10 2-59. OPERATION OF SWINGFIRE HEATER (Contd) (15) After heater operation, remove swingfire heater (9), from mixing pipe (refer to c. of this para.), turboheater (refer to d. of this para.), or water jacket (refer to e. of this para.) as necessary. Close fuel regulator knob (8) by turning clockwise. (16) After swingfire heater (9) stops, loosen wingnut (12) by turning counter- clockwise and remove cover (7). (17) Turn diaphragm valve (13) all the way counterclockwise. (18) Install cover (7) and tighten wingnut (12) by turning clockwise. c. Operation of Mixing Pipe. (1) General. Mixing pipe is installed on swingfire heater to thaw frozen brake lines, brakedrums, gear parts, tires, and other equip (2) Open wingnut (11) all the way counterclockwise. (3) Make sure gasket (10) is flat against body of swingfire heater (9). NOTE Swingfire heater should be in operation when installed. Refer to b. of this para. (4) Install mixing pipe (14) on swingfire heater (9) and tighten wingnut (11) by turning clockwise. Exhaust gases from mixing pipe can kill. Operate swingfire heater with mixing pipe in well-ventilated area only. Failure to do this may result in injury or death to personnel. (5) Direct hot air from mixing pipe (14) at equipment to be thawed. (6) After equipment is thawed, loosen wingnut (11) by turning counterclockwise and remove mixing pipe (14). (7) Install swingfire heater (9) in turboheater or water jacket, or stow, as of this para.). . . 2-217