TM 10-4320-310-145-12.INSPECT/REPAIR/REPLACE PISTON (Continued)INSPECTION:1Inspect piston, piston skirt, and piston grooves for excessive wear and damage. Replace damaged piston.NOTEExcessively worn piston, rings or cylinder may be an Indication of abnormalmaintenance procedures or operating conditions. Check for and correct anyabnormalities.2Examine piston (1) for scoring, fretting, piting, cracks(especially on the interior surfaces), damaged ringgrooves (2) or lands (3), or for indications ofoverheating. Repair slight scoring according torepair procedure. Replace damaged piston.3K piston is badly worn or damaged, check cylinder forexcessive out-of-round, high spots, or other damagein accordance with paragraph 5-11.4Measure piston diameter (1) along axis A and B. Anormal or new piston diameter should be 2.8724inches (72.96 mm). If piston is out-of-round, replacepiston.5-31
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