TM 5-4310-451-145-36. PISTON REPAIR (Con’t).WARNINGCompressed air used for cleaning or drying purposes, or for clearing restrictions, should neverexceed 30 psi (207 kPa). Wear protective clothing (goggles/shield, gloves, etc.) and use caution toavoid Injury to personnel.4.Dry parts with compressed air.5.Inspect all parts for damage. Replace damaged parts.NOTEPiston, sleeve bearing, and piston pin are a matched set and must be replaced as an assembly.6.Measure diameter of piston skirt (14) and checkfor out-of-round. Diameter must be at least4.2428 in. (10.7767 mm) at any point.7.Check piston skirt-to-cylinder sleeve clearanceas follows:(a)With cylinder sleeve (18) installed Inengine crankcase (19), install piston skirt(14) up- side down into cylinder sleeve.(b)Using feeler gage and spring scale, deter-mine feeler gage thickness required towithdraw feeler gage from between pistonskirt (14) and cylinder sleeve (18). Pullshould be 6 lb (2.72 kg).(c)Minimum clearances will be 0.001 in.(0.025 mm).(d)If clearance is greater than 0.0120 in.(0.3048 mm), replace piston skirt (14).5-112
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