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Page Title:
Table 1-1. Repair and Replacement Standards - continued |
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 TM 10-3930-621-34
Table 1-1. Repair and Replacement Standards
Manufacturer's
Maximum
dimensions and
allowable
tolerances in
Desired
wear and
Component
inches
clearance
clearance
Minimum Maximum
Minimum Maximum
ENGINE: Continued
Top, 2nd, 3rd ring diameter ...........................
3.250
.........
................................
................
4th ring rail diameter ......................................
3.250
.........
...................................
................
4th ring spacer diameter ................................
3.304
.........
3.329
0.025
Top, 2nd, 3rd ring wall ...................................
0.137
0.147
...................................
0.010
4th ring rail wall ..............................................
0.135
0.141
...................................
0.006
4th ring spacer wall ........................................
0.136
.........
...................................
................
Top, 2nd, 3rd ring width .................................
0.0930
0.0935
...................................
0.0005
4th ring rail width ............................................
0.0252
.........
...................................
................
4th ring spacer width......................................
0.1715
0.1815
...................................
0.0100
Top side clearance.........................................
.............................
0.0015
0.0030
0.0015
2nd, 3rd side clearance..................................
.............................
0.0005
0.0020
0.0015
4th ring total side
clearance ....................................................
.............................
0.002
0.004
0.002
Cylinder bore diameter .........................................
3.2503
3.2507
0.0004
Main bearing running clearance ...........................
.............................
0.0005
0.0030
0.0025
Camshaft:
Front bushing bore.........................................
2.1255
2.1260
...................................
0.0005
Center bushing bore ......................................
1.8760
1.8765
...................................
0.0005
Rear bushing bore .........................................
1.5005
1.5010
...................................
0.0005
Front journal diameter ...................................
2.1230
2.1240
...................................
0.0010
Center journal diameter .................................
1.8730
1.8740
...................................
0.0010
Rear journal diameter ....................................
1.4980
1.4990
...................................
0.0010
Front running clearance .................................
0.0015
0.0030
...................................
0.0015
Center running clearance...............................
0.0020
0.0035
...................................
0.0015
Rear running clearance..................................
.............................
0.0015
0.0030
0.0015
End play .........................................................
0.002
0.006
...................................
................
Connecting rod length (center
to center) ........................................................
7.240
7.250
...................................
................
Valve (intake and exhaust):
Stem diameter ...............................................
0.309
0.310
...................................
0.001
Guide outside diameter..................................
0.501
0.502
...................................
0.001
Guide inside diameter (new) ..........................
0.312
0.313
...................................
0.001
Guide inside diameter
(pre-sized....................................................
0.313
0.314
...................................
0.001
Insert outside diameter ..................................
1.4405
1.4415
...................................
0.0010
Insert inside diameter.....................................
1.2140
1.2240
...................................
0.0100
Insert depth ....................................................
0.187
0.189
...................................
0.002
Guide ram in block ........................................
0.49950
0.50005
...................................
0.00055
Insert counterbore depth................................
0.199
0.202
...................................
0.003
Insert counterbore diameter...........................
1.4365
1.4375
...................................
0.0010
1-4
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