ARMY TM 9-2815-260-24
AIR FORCE TO 38G1-126-2
MARINE CORPS TM 09244A/09245A-24
FIGURE 5-75. MEASURING PISTON RING GROOVE CLEARANCE.
Measure piston pin bore inner diameter. Piston pin bore inner diameter should be 1.6254
- 1.6258 in. (41.285 - 41.295 mm). If piston pin bore inner diameter exceeds
specifications, replace piston and cylinder liner, refer to paragraph 5.4.7, as a matched
Measure and record piston skirt diameter (1, Figure 5-76) 90 degrees off piston pin bore
and 1.1 in. (28 mm) from bottom of piston (2). Piston skirt diameter should be 4.188 -
4.189 in. (106.38 - 106.40 mm). If piston skirt diameter exceeds specifications, replace
piston and cylinder liner, refer to paragraph 5.4.6, as a set.
FIGURE 5-76. MEASURING PISTON SKIRT