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Assembly After Repair (cont)
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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Fuel Injector Tube Repair (cont) - TM-5-4210-220-34_187
TM 5-4210-220-34 2-19. ENGINE - Continued 2-19.5 Injectors - Continued (32)  Rotate the Injector one complete turn and note the total runout on the dial. (33)  If  total  runout  exceeds  0.008  in.    (0.20  mm) remove the injector from the gage.  Loosen the injector  nut,  recenter  the  spray  tip  by  rotating. Then  retighten  nut  to  75  ft  lb  (115  Nm)  and repeat  the  concentricity  test.    If  the  spray  tip cannot   be   repositioned,   rebuild   the   injector with a new nut. (34)  Perform   tests   a,   c,   and   d   detailed   in   TEST preceding.    The  injector  must  pass  all  tests prior     to     service.          If     it     fails,     repeat     all disassembly, inspection, and assembly instructions. d. Fuel Injector Tube Repair NOTE Injector tube cannot be repaired.  If the tube leaks it should be replaced.  Cylinder head must be removed to carry out this task. (1) Remove cylinder head as detailed In para.  2-19-8. (2) Place the injector tube installer J5286-4B in the injector tube.  Insert the pilot J5286-5 through the small opening of the injector tube.  Thread the pilot onto the installer.  Handtighten the pilot. (3) Tap on the end of the pilot to loosen the injector tube then lift tube, installer, and pilot out of the cylinder head. (4) Discard the tube and seal. (5) Thoroughly clean the injector tube holes in the cylinder head to remove dirt, burrs, or foreign material. (6) Carefully remove burrs and foreign material.  Do not not scratch or dent the sealing surfaces. NOTE Any cylinder head resurfacing must be done prior to injector tube installation. (7) Lubricate the new injector tube seal with engine oil (item 17, Appendix B).  Place in top counterbore of cylinder head. 2-190

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