TM 9-2815-225-34&P
APPENDIX F
WEAR LIMITS AND TOLERANCES
F-1. GENERAL
a.
All parts, components, or assemblies which do not meet the minimum wear standards specified in this appendix will be
replaced with new material.
b.
All used parts, components, or assemblies considered for reuse must comply with the minimum wear, fit, and tolerance
standards specified in this appendix. Parts must be closely inspected to ensure there is no damage in areas not listed in the wear
limits, which would make them unfit for further use.
F-2. REPAIR STANDARDS
MEASUREMENT
WEAR LIMIT
NEW MINIMUM
NEW MAXIMUM
CYLINDER BLOCK
SPECIFICATIONS
Camshaft Bushing
Inside Diameter
2.5023 (6.3558 cm)
2.4983 (6.3457 cm)
2.5013 (6.3533 cm)
Camshaft Bushing Bore
Inside Diameter
2.6265 (6.6764 cm)
2.6245 (6.6662 cm)
2.6255 (6.6688 cm)
Cylinder Liner Counterbore
Inside Diameter
6.5615 (16.6662 cm)
6.6255 (16.8288 cm)
Depth
0.412 (10.465 mm)
0.350 (8.89 mm)
0.352 (8.941 mm)
Liner to Block Clearance
Lower Bore
0.002 (0.0508 mm)
0.006 (0.152 mm)
Lower Liner Bore
Inside Diameter
6.124 (15.555 cm)
6.126 (15.560 cm)
Main Bearing Bore
Inside Diameter
4.7505 (12.066 cm)
4.7485 (12.0612 cm)
4.750 (12.065 cm)
Block
Height from Main Bearing
18.994 (48.245 cm)
19.003 (48.268 cm)
19.007 (48.278 cm)
Centerline
Height from Installed Alignment
16.619 (42.212 cm)
16.628 (42.235 cm)
16.632 (42.245 cm)
Cylinder Liner
Inside Diameter
5.505 (13.983 cm)
5.4995 (13.9687 cm)
5.501 (13.973 cm)
NOTE
New cylinder liner dimensions at 60-70F (16-21C); may be 0.0002-0.0006 in. (0.00508-
0.01524 mm) smaller than indicated due to the lubricating oil coating.
Protrusion (installed)
0.003 (0.076 mm)
0.006 (0.152 mm)
Crankshaft
Connecting Rod Journal
Outside Diameter
3.122 (7.930 cm)
3.1235 (7.9337 cm)
3.125 (7.938 cm)
Main Bearing Journal
Outside Diameter
4.4975 (11.4237 cm)
4.4985 (11.4262 cm)
4.500 (11.4 cm)
Thrust Bearing Surface-to-Rear
Counterweight
3.006 (7.635 cm)
3.001 (7.623 cm)
3.003 (7.628 cm)
F-1
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