Quantcast FUEL  INJECTION  PUMP  REPAIR  (Contd) - TM-9-2815-237-34_122

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WARNING TM 9-2815-237-34 2-32.  FUEL  INJECTION  PUMP  REPAIR  (Cont’d) 36. Using a micrometer, measure drive shaft (2) at point “A” to determine wear. Inspect drive shaft (2) seal  area  for  nicks,  burrs,  scratches,  or  damage.  Replace  drive  shaft  (2)  if  measurement  at  point  “A” is  less  than  0.305  in.  (7.75  mm)  or  if  any  nicks,  burrs,  scratches,  or  damage  is  present. 37. Inspect dowel pin (1) in drive shaft (2) for damage. If damaged, replace dowel pin (1). Apply sealing compound  to  replacement  dowel  pin  (1). CAUTION Hydraulic  head  and  rotor  are  matched  sets  and  must  be  replaced as  an  assembly  or  injection  pump  damage  may  result. 38. Inspect fittings (4) in hydraulic head (3) for damage. Replace hydraulic head (3) and rotor (13) if any fittings  (4)  are  damaged. CAUTION Do  not  handle  precision  ground  surface  of  rotor  to  prevent contamination. 39. Inspect hydraulic head (3) and rotor (13) for damage. Replace both if either is damaged. 40. Inspect charging ports (11) and discharge port (12) on rotor (13) for chipped edges. Replace hydraulic head  (3)  and  rotor  (13)  if  any  chipped  edges  are  apparent. 41. Inspect rotor (13) for scratches. Replace hydraulic head (3) and rotor (13) if scratches are present. Do not allow solvents to get on skin or clothing. Solvents can burn easily and give off harmful vapors. Keep away from open fire and use  in  a  well-ventilated  area.  If  solvent  gets  on  skin  or  clothing, wash  immediately.  Failure  to  follow  these  instructions  could  cause injury  or  death. NOTE It maybe necessary to interchange or reverse plunger position when  installing  plungers  into  rotor. 42, While holding rotor (13) under clean calibrating fluid, insert plungers (10) into bores of rotor (13). With  thumb  and  forefinger  over  roller  shoe  (9)  slots,  tilt  from  side  to  side  to  determine  freedom of movement. If the plungers (10) are sticking, but not visibly damaged, clean both plungers (10) and  bore  with  a  soft  brush  and  lacquer  thinner  or  acetone.  Check  freedom  of  movement  again. If  plungers  (10)  still  stick,  replace  them  with  the  next  smaller  size  (“A”  is  the  largest,  “D”  is  the smallest).  If  the  smallest  plungers  (10)  stick  in  rotor  (13),  replace  hydraulic  head  (3)  and  rotor  (13). 43. Inspect leaf spring contact area (14) and tang slot (7) on rotor (13) for excessive wear. Replace hydraulic  head  (3)  and  rotor  (13)  if  leaf  spring  contact  area  (14)  or  tang  slot  (7)  are  excessively  worn. 44. Inspect cam rollers (8) for freedom of rotation in their roller shoes (9). Inspect cam rollers (8) and roller  shoes  (9)  for  abrasive  wear  patterns.  Replace  cam  rollers  (8)  and  roller  shoes  (9)  if  cam rollers  (8)  do  not  rotate  freely  or  if  either  shows  signs  of  abrasive  wear  patterns. 45. Inspect top edge of each roller shoe (9) for chipping or excessive wear. Replace cam rollers (8) and roller  shoes  (9)  if  chipped  or  excessively  worn. 46. Inspect leaf spring (6) for excessive wear.  Replace leaf spring (6) if excessively worn. 47. Inspect leaf spring screw (5) for tightness in rotor (13). Replace leaf spring screw (5) if screw (5) does  not  thread  tightly  into  rotor  (13). 2-104


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