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 317 of 596
TM 9-2815-205-34
TABLE 3-6. PISTON RING SPECIFICATIONS
MINIMUM
MAXIMUM
RING GAP
Compression Rings
0.0200 in.
0.0460 in.
(0.508 mm)
(1.168 mm)
Oil Control Rings
0.0100 in.
0.0250 in.
(0.254 mm)
(0.635 mm)
CLEARANCE (RING TO GROOVE)
Top Groove
0.0030 in.
0.0060 in.
(0.076 mm)
(0.152 mm)
Second Groove
0.0070 in.
0.0100 in.
(0.178 mm)
(0.254 mm)
Third and Fourth Grooves
0.0045 in.
0.0070 in.
Model 5063-5299
(0.114 mm)
(0.178 mm)
Third and Fourth Grooves
0.0050 in.
0.0080 in.
Models 5063-5395 and 5063-5398
(0.127 mm
(0.203 mm)
Oil Control Ring Grooves
0.0015 in.
0.0055 in.
(0.038 mm)
(0.140 mm)
CAUTION
File or stone both ends of fire
and compression rings from
outer surface to inner surface
to prevent chipping or peeling
of chrome plating on rings.
(2) File ends of fire or compression ring if
ring gap is too small. Ends of ring must
remain square and chamfer on outer
edge must be approximately 0.015 inch.
(3) Using thickness gage, measure ring side
clearance. Refer to Table 3-6 for ring
side clearance specifications.
3-187
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