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 TM 9-2815-220-24
PISTONS, RINGS, AND ASSOCIATED PARTS REPLACE/REPAIR
0142 00
INSPECTION (Continued)
9. Measure ring end gap.
a. Place each ring (1, 2, 3, 4) one at a time, in the appropriate ring gauge (9) (standard or
oversize).
NOTE
Ring gauges are identified according to ring size. Some gauges are
duel purpose tools; i.e., each side for a different size ring. Select the
proper ring gauge from the following table.
Gauge Identification
Ring Size Identification
Ring Gauge
5.7500 and 5.7700
Standard and 0.020 in. oversize
Item 48 (WP 0176)
5.7600 and 5.7800
0.010 and 0.030 in. oversize
Item 45 (WP 0176)
0.7500 and 5.7900
Standard and 0.040 in. oversize
Item 46 (WP 0176)
b. Measure end gap with a thickness gauge (10) (item 54, WP 0176). Replace rings that do
not meet the following limits.
Location
Sizes and Fits of New Parts
Wear Limits
inches (mm)
1. (Top compression ring)
0.0250 (0.635)
0.0350 (0.889)
0.0350 (0.889)
2. (Intermediate compression rings
0.0250 (0.635)
0.0350 (0.889)
0.0350 (0.889)
2nd and 3rd groove)
3. (Oil control ring)
0.0350 (0.889)
0.0450 (1.143)
0.0450 (1.143)
3
2
2
1
10
9
WP 0142 00-9
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