ARMY TM 9-2815-255-24
AIR FORCE TO 38G1-95-2
MARINE CORPS TM 2815-24/4
NOTE
Some piston pin bores are elliptical, the width being 0.0015 inch (0.038 mm) larger than the bore
specifications.
r.
Inspect exterior length of liner for pitting (A, FIGURE 3-131). Check packing step for erosion (B). If pitting or
erosion is observed, measure depth of pits and erosion with a fine wire or needle. Replace liner if (C) depth of
any pit is one-half or more of liner thickness, or (D) depth of erosion is one-half or more of the packing step. If no
defects are found, proceed to next step.
NOTE
If pitting has occurred, check condition of coolant.
NOTE
Liners are reusable if depth of pits or erosion is less than amount specified. When installing
reusable liners, rotate 90 degrees from original position. The liners should be deglazed and new
ring sets installed on pistons, refer to paragraph 3-47.1.
FIGURE 3-131. Inspecting Cylinder Liner Pitting
s.
Carefully examine cylinder liner for signs of fatigue, such as fine cracks in flange area (A, FIGURE 3-132) and
cracks in the ring travel area (B). If any defects are found, replace the piston and liner. If no defects are found,
proceed to next step. If pistons and liners have passed all previous checks, proceed to check both for proper
specifications, listed in steps t and u.
3-192
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