TM 5-4310-386-14
(4)
Inspect cylinder walls for cracks, scoring or damage. Replace if cracked, scored or damaged.
(5)
Inspect piston rings (1) for cracks, or excessive wear. Replace if cracked or worn excessively.
NOTE
Maximum wear limit of cylinder diameter is 1.2634 inches (32.09 mm).
(6)
Using micrometer, measure cylinder diameter in four places A, B, C, and D.
(7)
Place each piston ring in cylinder and measure piston ring gap with feeler gage. Gap must be between
0.01
to 0.25 mm.
(8)
Install four piston rings (1) on piston (2).
(9)
Measure piston ring clearance in the groove. The clearance should be between
0.00197 to 0.00393 (0.05 to
0.1 mm).
(10) Install 3rd stage cylinder and piston (para. a. above).
FOLLOW-ON MAINTENANCE
Install 3rd stage compressor valve head assembly (para. 5-22).
6-21
