ARMY TM 9-2815-260-24
AIR FORCE TO 38G1-126-2
MARINE CORPS TM 09244A/09245A-24
FIGURE 5-73. PISTON INSPECTION (DEFECTS EXAGGERATED)
FIGURE 5-74. CHECKING PISTON KEYSTONE RING GROOVE WEAR.
Check second and third piston grooves using new piston ring (7, Figure 5-72)
and feeler gauge, refer to Figure 5-75. Check clearance at several points. Ring
groove clearance should not exceed 0.008 in. (0.20 mm). If clearance exceeds
specification, replace piston (4, Figure 5-72) and cylinder liner (11), refer to
paragraph 5.4.6, as a set.