4-39. ENGINE FUEL TANK ASSEMBLY. (cont) b. Installation.   (cont) (8)  Install  engine  housing  and plenum access covers and secure with turnlock  fasteners. (9)  Connect  battery  cable  plug connector to battery. (10)  Remove handbrake. 4-40. SECONDARY Maintenance  of (fluid) filter is chocks and release FUEL (FLUID) FILTER. the secondary fuel limited  to  servicing and replacement. Filter element replacement is recommended every 300 hours minimum. a. Service. (1) Gain access to fuel housing (paragraph  4-34a). (2)  Unscrew filter bowl    (1, figure 4-28) from filter housing (7). Discard fuel in filter bowl. from with (3)  Remove filter element  (2) filter  housing  and  discard. (4)  Thoroughly  clean  filter  bowl P-D-680. (5)  Remove packing (3) from filter housing (7). (6) Install new preformed packing (3) in filter housing (7). (7) Install new  filter  element (2) in filter housing (7). (8)  Screw  bowl  (1)  into  filter housing (7) hand tight. (9) Close fuel 4-31C). housing   (paragraph ARMY TM  5-6115-612-12 MARINE  CORPS  TM  6115-12/7 AIR  FORCE TO 35C2-3-471-1 N A V Y AG-320B0-0MM-000 b. Removal. (1) Gain access to fuel housing (paragraph  4-34a). (2) Drain fuel system (paragraph 4-34b). (3)   Tag   and   disconnect   filter inlet and outlet fuel lines. (4) Remove nuts (4), washers (5), and capscrews (6) that secure filter housing (7) to filter bracket (8). c. Installation. (1) Install washers (5) on capscrews (6). Insert capscrews through  filter  housing  (7)  and  secure to filter bracket (8) with remaining washers (5) and nuts (4). Torque to 40-60  inch  pounds  (4.5-6.8  Nm). (2)  Remove tags and connect filter inlet and outlet fuel lines. (3) Close fuel housing (paragraph 4-34C). 4-41. ELECTRICAL  HIGH  PRESSURE  FUEL PUMP. Maintenance  of  the  electrical high pressure fuel pump is limited to replacement. When testing/trouble- shooting procedures isolate the high pressure   pump   as the   cause   of   a malfunction, remove the pump and send to direct support for repair. a. Removal (1) Gain access to fuel housing (paragraph  4-34a). (2) Drain fuel 4-34b). system  (paragraph 4-95