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REMOVAL - TM-5-4210-220-34_177
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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TEST - TM-5-4210-220-34_179
TM 5-4210-220-34 2-19. ENGINE - Continued 2-19.5 Injectors - Continued INSPECTION (1) Inspect  injector  for  external  damage;  cracked  or  damaged  follower,  or  body;  uneven  movement  of control rack etc. (2) Perform  tests  on  injector  as  detailed  in  TEST  following.    If  the  injector  is  to  be  replaced,  check  new injector has passed all tests detailed in TEST following before installing in truck. (3) Inspect  the  beveled  seat  of  the  injector  tube  in  the  cylinder  head.    Remove  any  carbon  deposits  with reamer J5286-9.  Use care to remove only the carbon so that the proper clearance between the injector body and the cylinder head is maintained.  Pack the flutes of the reamer with grease to retain the carbon removed from the tube.  If the injector tube is leaking refer to Injector Tube Repair following. INSTALLATION (1) Fill the injector with clean fuel oil be adding fuel to the inlet filter cap until it runs out of the outlet filter cap. (2) Insert injector into the injector tube with the dowel pin in the injector body alined with the locating hole in the cylinder head. (3) Slide over the injector control rack lever so that it registers with the injector rack. (4) Install the injector clamp, special washer (with curved side toward injector clamp), and bolt. Tighten bolt to 25 ft lb (34 Nm) while operating the control rack.  Do not overtighten the bolt. Make sure the clamp does not interfere with the injector follower spring or the exhaust valve springs. (5) Move the rocker arm assembly into position and secure the rocker arm assembly to the cylinder head by tightening the bolts to 100 ft lb (136 Nm). (6) Remove the shipping caps and install the fuel pipes.  Use socket J8932-01 to tighten the connections to 15 ft lb (20 Nm).  Do not bend the fuel pipes or overtighten the nuts. (7) Adjust  the  valve  clearance  as  detailed  in  para.    2-19.7  and  adjust  the  injector  timing  as  detailed  in ADJUSTMENT preceding. TEST NOTE Injector removed from truck, see REMOVAL preceding. WARNING JP-4 is a highly volatile fuel.  Extraordinary care must be taken when servicing components that use this fuel.  The truck shall be grounded to an approved grounding point if it contains JP-4. 2-182

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