ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
5-75
FIGURE 5-73. PISTON INSPECTION (DEFECTS EXAGGERATED)
FIGURE 5-74. CHECKING PISTON KEYSTONE RING GROOVE WEAR.
2
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.
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