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TM 10-4320-324-14
Table 6-1. Wear Limits, Fits, and Tolerances - CONT.
Component
Minimum
Maximum
Piston Rings - continued:
4th ring clearance in groove
0.0015 in.
0.0028 in.
(0.04 mm)
(0.072 mm)
4th ring maximum clearance in groove
0.0059 in.
(0.15 mm)
Gap: 1st ring - normal
0.0137 in.
0.0216 in.
(0.350 mm)
(0.550 mm)
Gap: 2nd ring - normal
0.0079 in.
0.0177 in.
(0.20 mm)
(0.45 mm)
Gap: 3rd ring - normal
0.0098 in.
0.0197 in.
(0.25 mm)
(0.50 mm)
Gap: 4th ring - normal
0.0098 in.
0.0157 in.
(0.250 mm)
(0.40 mm)
Gap: 1st, 2nd, 3rd and 4th rings - maximum
0.0315 in.
(0.80 mm)
Connecting Rods:
Hole for connecting rod pin bushing
1.496 in.
1.4966 in.
(38.0 mm)
(38.016 mm)
Rod bearing bore diameter, less bearing
2.5196 in.
2.5204 in.
(64.0 mm)
(64.019 mm)
Rod bearing inside diameter
2.3622 in.
2.3637 in.
(60.00 mm)
(60.039 mm)
Rod pin bushing outside diameter
1.498 in.
1.4992 in.
(38.050 mm)
(38.080 mm)
Rod pin bushing inside diameter - pressed in
1.3795 in.
1.3813 in.
(35.040 mm)
(35.086 mm)
Rod pin-to-bushing clearance
0.0015 in.
0.0035 in.
(0.040 mm)
(0.091 mm)
Rod pin-to-bushing maximum clearance
0.0059 in.
(0.150 mm)
Rod bearing width
0.9763 in.
0.9842 in.
(24.80 mm)
(25.00 mm)
6-5
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