TM 9-2320-386-10 2-117 (2-118 blank) 2-48. OPERATION OF SWINGFIRE HEATER (Contd) (5) Allow swingfire heater (5) to run until temperature gauge reads 190°F (88°C). (6) When temperature gauge reads 190°C (88°C), loosen wingnut (9) by turn- ing counterclockwise and remove swingfire heater (5). Start engine (para. 2-12). (7) Install cap (11) on end of water jacket (10). (8) Install swingfire heater (5) in mixing pipe (refer to task c.), turboheater (refer to task e.), or stow (refer to task f.), as necessary. f. Stowage of Swingfire Heater and Mixing Pipe. (1) General. Swingfire heater and mixing pipe are stowed under companion seat. (2) Shut off swingfire heater (5) (refer to task b.). WARNING Mixing pipe will become hot after continued operation. Do not remove mixing pipe until cool. Failure to do so may result in injury to personnel. (3) Position mixing pipe (12) on stowage brackets (17). Place straps (18) over mixing pipe (12) and install latches (16) on stowage brackets (17). (4) Position swingfire heater (5) on stowage brackets (15). Place strap (13) over swingfire heater (5) and install hook (14) on stowage bracket (15). 13 5 14 12 18 17 16 15 5 9 8 5 10 11