TM-9-2815-205-34

ENGINE WITH CONTAINER; MODELS 5063-5299, 5063-5392, 5063-5393, 5063-5395, 5063-5398, 5063-539F, 5063-539L

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

AUGUST 1992

TM-9-2815-205-34 - Page 319 of 596

TM 9-2815-205-34

NOT E

Clean piston surface around

piston pin retainer before

measuring retainer leakage.

(f) Check each piston pin retainer for

proper sealing with leak detector (23).

Place suction cup over retainer and

hand operate lever to pull a vacuum

of 10.0 inches of mercury on gage. A

drop of more than 5.0 inches of

mercury in age reading over 10

seconds indicates air leakage at

retainer.

(2) Installation - Piston Rings

(a) Lubricate piston rings and piston with engine oil before installing rings.

CAUTION

•

Do not overlap ends of oil control ring expanders. An overlapped expander will cause

oil control ring to protrude beyond allowable limits and result in breakage when

inserting piston in ring compressor.

(b) Install wavy ring expander (15) in oil control ring groove (C) in piston (13).

(c) Install spiral ring expander (14) in oil control ring groove (D) in piston (13).

3-189

•

Do not cut or grind ends of expanders to prevent overlapping. Cutting or grinding ends

will decrease expanding force on oil control rings and result in high lubricating oil

consumption.