TM 10-3930-671-24 6. Cam Rollers and Shoes Check each roller in its shoe for  freedom  of  rotation.  Inspect  the  top  edge  of  each shoe,  where  retained  by  the  leaf  spring,  for  chipping  or excessive   wear.   Inspect   roller   and   shoe   for   abrasive wear patterns as illustrated (Figure 4.6). FIGURE 4.6. 7. Leaf Spring and Screw Check for excessive wear at points  where  the  spring  contacts  the  radii  on  the  rotor and  along  the  steps  that  retain  the  roller  shoes  (Figure 4.7). Check the adjusting screw for tightness in the rotor. FIGURE 4.7. 8.  Cam  Since  only  the  working  portions  of  the  lobes  on the inside diameter are ground, any tool marks between lobes should not be considered as damage. The mottled appearance  of  the  cam  is  from  heat  treatment  rather than from operation. Carefully inspect the cam lobes and edges of all flat surfaces. If there is evidence of spalling or flaking out, replace with a new cam (Figure 4.8). FIGURE 4.8. 9. Governor Weights Check pivot points (heel and toe) of all weights for excessive wear (Figure 4.9). FIGURE 4.9. 10. Transfer Pump Blade Inspect with the utmost care. Check for chipping on any of the edges, including spring bore edges, pitting, imbedded foreign particles or scoring on    the    rounded    edges.    Determine    blade    wear    by measuring  the  length  (0.538"  min.  [13.67mmD.    Inspect flat surfaces visually for deep scores (Figure 4.10). f any discrepancies  are  noted,  replace  both  blade  sets   and springs. FIGURE 4.10. F-234