TM 9-2320-363-34-2
PISTON AND CYLINDER ASSEMBLY REPLACEMENT (CONT)
12.
NOTE
Increase insufficient
ring. File or stone
compression ring gap by filing or stoning ends of piston
both ends of piston ring with cutting action from outer
surface to inner surface to prevent chipping or peeling of plasma or chrome
plate.
Piston ring ends must remain square and outer edge chamfer must be
approximately 0.015 in. (0.381 mm).
MEASURE COMPRESSION RING GAP OF TOP RING AS SHOWN. REMOVE RING (11) FROM
CYLINDER LINER AFTER MEASUREMENT IS COMPLETE. REPEAT THIS PROCEDURE FOR EACH
RING (11) AND RECORD MEASUREMENTS. ALLOWABLE RING END GAP IS AS FOLLOWS:
FIRE RING
0.016-0.35 IN. (0.40-0.91 mm)
COMPRESSION RING ....................................................... 0.031-0.052 IN (0.80-1.31 mm)
OIL CONTROL RING . . . . . . . . . . . . . . . . . . . . . . . . . 0.016-0.032 IN. (0.40-0.81 mm)
12-158