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TM 5-4320-308-13
4-19.
INSPECT/REPAIR/REPLACE PISTON (Continued)
INSPECTION
1
Inspect piston, piston skirt, and piston grooves for excessive wear and damage. Replace damaged piston
NOTE
Excessively worn pistons, rings, or cylinders may be an indication of abnormal
maintenance procedures or operating conditions. Check for and correct any
abnormalities
2
Examine piston (1) for scoring, fretting, pitting, cracks (especially on the interior surfaces), damaged ring grooves
(2) or lands (3), or for indications of overheating. Repair slight scoring according to repair procedure. Replace
damaged piston
3 If piston is badly worn or damaged, check cylinder for excessive out-of-round, high spots, or other damage in
accordance with paragraph 4-18.
4
Measure piston diameter (1) along axes A and B. A normal or new piston diameter should be 2.8724 inches
(72.96 mm). If piston is out-of-round, replace piston.
4-55
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