TM9-2320-361-10 2-59. OPERATION OF SWINGFIRE HEATER (Contd) d. Operation of Turboheater. (1) General. Swingfire heater is installed in turhoheater to provide heated air for cargo body enclosure. (2) Open wingnul (3) all the way counterclockwise. (3) Make sure gasket (2) is flat against body of heater (1). (4) Raise catch (9) and open access door (7). • • (5) NOTE Make sure swingfire heater is installed with pump lever straight up. Swingfire heater should he in operation when installed. Refer to b. oft his para. Open door (8) (refer to para. 2-51 ) and install swingfire heater (1) in turboheater (4). Tighten wingnut (3) by turning clockwise. (6) Make sure overheating switch (6) is in OPERATION position. (7) Close access door (7) and install catch (9). (8) Adjust air flow by moving diverters (11). WARNING Box assembly will become hot after continued operation. Be careful when opening acess door. Failure to do this may result in injury to personnel. (9) If swingfire heater (1) suddenly stops and fuel tank is not empty, raise catch (9), and open access door (7). Do not allow skin to contact box (5) if hot 2-218