TM 9-2320-386-10 2-115 2-48. OPERATION OF SWINGFIRE HEATER (Contd) d. Operation of Turboheater. (1) General. Swingfire heater is installed in turboheater to provide heated air for cargo body enclosure. (2) Open wingnut (5) all the way counterclockwise. (3) Make sure gasket (4) is flat against body of swingfire heater (6). (4) Raise catch (14) and open access door (12). NOTE • Make sure swingfire heater is installed with pump lever straight up. • Swingfire heater should be in operation when installed. Refer to task b. of this paragraph. (5) Open door (13) (refer to para. 2-43) and install swingfire heater (6) in turboheater (9). Tighten wingnut (5) by turning clockwise. (6) Make sure overheating switch (11) is in OPERATION position. (7) Close access door (12) and install catch (14). (8) Adjust air flow by moving diverters (15). WARNING Box assembly will become hot after continued operation. Be careful when opening access door. Failure to do so may result in injury to personnel. (9) If swingfire heater (6) suddenly stops and fuel tank is not empty, raise catch (14) and open access door (12). Do not allow skin to contact box (10) if hot. 10 11 12 13 14 9 15 4 6 5 6