ARMY TM  5-6115-612-12 MARINE  CORPS  TM  6115-12/7 AIR  FORCE T0 35C2-3-471-1 NAVY AG-320B0-0MM-000 Section X. 4-34. GENERAL. The fuel (figure 4-22) provides    a efficient flowing supply of fuel MAINTENANCE  OF  FUEL  SYSTEM system clean, to the turbine     engine.     The system    is supported    by    an    externally    mounted, 32-gallon (121.13 1) fuel tank. A full tank  provides  approximately  four  hours operating    time. Components  mounted  in the  fuel  housing  are  the  fuel  transfer pump,   primary   fuel   filter,   secondary fuel     filter, high pressure pump, and t  h e f u e l shutdown/drain solenoid v a l v e . These  components  combine  to control    the    fuel    flow    to    the    fuel m a n i f o ld mounted    on the turbine e n g i n e . The fuel manifold has three fuel  Injection  nozzles  that  provide  a fine mist of fuel to support combustion in  the  turbine  combustion  chamber.  The fuel system provides the turbine engine with  a  fuel  flow  at  the  rate  required to     maintain proper combustion and e n g i n e speed under all l o ad conditions. A  block  diagram  of  the fuel system is shown in figure 4-23. NOTE If not specified in procedure, apply accordance with table 1-1, Specifications. maintenance torque    in T  o  r  q  u  e a. Fuel Housing Access. (1) Remove power cable from cable support  assembly. WARNING To  prevent  injury,  ensure  that battery cable plug connector is disconnected from battery before performing  maintenance. (2) Disconnect battery cable plug connector  from  battery. (3) Unlatch and open fuel housing access door. Secure in open position. b. Draining the Fuel   system. (1) Gain access to fuel housing (paragraph 4-34a). (2) Place suitable container under drain of primary fuel filter. WARNING To prevent injury from explosion or fire, drain fuel    in    a well-ventilated area. Keep  away from all open flames and sparks. Do not up all (3) line  from line. smoke. Immediately clean spilled fuel. Tag and, disconnect inlet fuel transfer  fuel  pump.  Cap  fuel (4) Open primary  filter. stops draining. fuel  drain valve  on Close drain when fuel (5) Carefully unscrew and remove bowl of secondary fuel filter. Dump fuel  into  container. Install bowl on filter and tighten hand tight. c. Closinq  t he Fuel Housing. (1) Close and securely latch fuel housing access door. (2)  Connect  battery  cable  plug connector to battery. (3)  Stow  power  cable  on  cable support assembly. 4-84