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ARMY TM 9-2815-257-24 AIR FORCE TO 38G1-128-2 MARINE CORPS TM 10155A/2815-24/3 3-18 3-14.  FUEL INJECTOR MAINTENANCE This task covers removal, inspection, and installation. INITIAL SETUP Tools: Equipment Condition: Tool Kit, General Mechanic’s Automotive Engine cool (Item 2, App. B, Sect. III) Bolt, M8 or M9 x 100mm, minimum length A.    REMOVAL. 1. Disconnect fuel supply line from fuel injector (3, Figure  3-4).    Disconnect  fuel  return  hose  (2)  by loosening clamp (1). 2. Remove two nuts (4) and nozzle retainer (5) from studs (8). CAUTION When removing fuel injector, wrap it in a clean cloth to protect injector nozzle.   Do  not  place  nozzle  tip  directly  onto  a hard surface, as damage will result. 3. Carefully remove fuel injector (3) from injection port in cylinder head. 4. Remove   injector   spacer   (6)   and   gasket   (7).   Thread  M8  or  M9  bolt  into  nozzle  gasket.    Pull out bolt to remove gasket.  Discard gasket. B.    INSPECTION. 1. Inspect  fuel  injector  (3,  Figure  3-4)  for  obvious damage.      Check   for   clogged   or   dirty   injector nozzle.  Replace injector if nozzle is damaged.          Figure 3-4.  Fuel Injector Removal 2. Inspect return fuel hose (2) for cuts, tears, kinks, or crimping.  Replace hose if damaged.


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