4-35. FUEL  LINES, VALVES , FITTINGS (ENGINE   HOUSING).  Maintenance of the fuel lines, valves, and fittings located in the engine housing consists of inspection and replacement of the fuel  manifold  (figure  4-24). a. Inspection. WARNING To  prevent  injury,  ensure  that battery cable plug connector is disconnected from battery before performing  maintenance. (1) Disconnect battery cable plug connector  from  battery. (2) Loosen turnlock fasteners and remove  engine  housing  access  cover. (3) Inspect for signs of leakage at solenoid valve bulkhead connection. Ensure  that  connection  is  secure. (4) Inspect for signs of leakage at  fuel  manifold  and  fuel  injection nozzle connections. Ensure that connections  are  secure. A R MY TM  5-6115-612-12 MARINE  CORPS  TM  6115-12/7 AIR  FORCE TO 35C2-3-471-1 N A VY AG-320B0-0MM-000 (2) Loosen turnlock fasteners and remove  engine  housing  access  cover. (3)  Disconnect  fuel line from solenoid  valve  bulkhead  connection. (4)  Remove  lockwire,  bolts  (1), washers  (2), and spacers (3) so that fuel manifold (4) can be removed. (5)  Remove  loop  clamps  (5)  from fuel lines only if damaged. (6) Disconnect damaged fuel lines from tube cross (6). c. Installation. (1)  Connect  fuel  lines  to  tube cross  (6). (2) Position loop clamps (5), if removed, on fuel lines. (3)  Position  fuel  manifold  and spacers (3). Secure with washers (2) and bolts (1). Torque to 10-15 inch pounds (1-1.7 Nm). (4) Connect fuel line to solenoid valve. (5) Install engine housing access (5) Install engine housing access cover a n d secure with turnlock cover and secure with turnlock fasteners. fasteners. (6)  Connect  battery  cable  plug (6)  Connect  battery  cable  plug connector  to  battery. connector  to  battery. b. Removal. 4-36. FUEL  LINES, VALVES, FITTINGS (INTERNAL). Maintenance of the internal fuel lines, valves, and WARNING fittings  is  limited  to  replacement. To  prevent  injury,  ensure  that a. Removal. battery cable plug connector is disconnected from battery before (1) Gain access to fuel housing performing   maintenance. (paragraph  4-34a). (1) Disconnect battery cable plug (2) Drain fuel system (paragraph connector  from  battery. 4-34b). 4-87