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Page Title: REPAIR INJECTION PUMP (Continued)
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TM 5-4320-305-24 4-4.  REPAIR INJECTION PUMP (Continued) a.      Measure   and   record   height   of   screw   (147)   above tappet (148). b.    Loosen  nut  (149),  and  remove  screw  (147)  and  nut. Remove guide pin (150). c.  Press stud (151) from bushing (152) and tappet (148). Remove bushing from roller (153). d.  Inspect screw (147) for thread damage and for worn or crushed end.  Replace if damaged. e.    Inspect  tappet  (148)  for  pressure  marks  or  scoring. Remove light marks and scoring using crocus cloth. f.  Inspect stud (151) for grooving.  Replace if grooved or bent. g.  Inspect nut (149), guide pin (150), bushing (152), and roller (153) for heavy wear.  Replace damaged parts. h.  Press bushing (152) into roller (153), and position roller in tappet (148). i.  Press stud (151) through tappet (148) and into bushing (152). j.    Install  guide  pin  (150),  nut  (149),  and  screw  (147).    Turn  screw  to  height  above  tappet  body  as  recorded  in  step  a above. k.  Tighten nut (149) to secure screw (147). 3  Inspect camshaft (82) for cracks or distortion.  Inspect threads for damage.  Inspect cam lobes for chipping, scoring, grooving, or cracks.  If damaged, replace camshaft. 4  Inspect bearing cups (80 and 84) and bearing cones (86 and 89) for flat areas, pitting, cracks, or chipping. Inspect bearing cones for cracked races.  Replace mating bearing cups and bearing cones as a pair if either is damaged. 4-16

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