TM  10-3930-638-24&P 4-3.   FUEL   SYSTEM   MAINTENANCE   (cont) b. Fuel Injection Pump (cont). STEP LOCATION INSPECTION   (cont) 18 (cont) ITEM f.  Cam  rollers and shoes (118 and 119) g. Leaf spring and screws (120 and 121) EXAMINE FOR SPECIFICALLY INSPECT Check each roller in its shoe for  freedom  of  rotation. Inspect top edge of each shoe,  where  retained  by leaf spring, for chipping or excessive  wear.  Inspect  for abrasive  wear  patterns  as shown Check  for  excessive  wear  at points  where  spring  con- tacts the radii on rotor and along steps that retain roller shoes (see illustra- tion).  Check  adjusting screw  for  tightness  in  rotor 4-109