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 TM 55-1905-220-14-4
Table Of Specifications. (continued)
ENGINE PARTS
MINIMUM
MAXIMUM
LIMITS
(Standard Size, New)
(inches)
(cm)
(inches)
(cm)
(inches)
(cm)
Piston:
Height (centerline of
bushing to top) ......................
3.5430
8.9992
3.5480
9.0119
Diameter (above compres-
sion rings) ..............................
4.2225
10.7252
4.2255
10.7328
Diameter (at skirt).........................
4.2428
10.7767
4.2450
10.7823
Clearance-piston skirt-
to-liner....................................
.0045
.0114
.0083
.0211
.0120
0305
Out-of-round.................................
.0005
.0013
Taper ...........................................
.0005
.0013
Compression rings:
Gap (top-fire ring) .........................
.0230
.0584
.0380
.0965
.0600
.1524
Gap (No. 2, 3 and 4).....................
.0180
.0457
.0430
.1092
.0600
.1524
Clearance-ring-to-groove:
No. 1 (top-fire ring) .......................
.0040
.0102
.0070
.0178
.0180
.0457
No. 2 ............................................
.0100
.0254
.0130
.0330
.0220
.0559
No. 3 and 4...................................
.0040
.0102
.0070
.0178
.0130
.0330
Oil control rings:
Gap ..............................................
.0080
.0203
.0230
.0584
.0430
.1092
Clearance.....................................
.0015
.0038
.0055
.0140
.0080
.0203
Crankshaft
Journal diameter-main
bearing ......................................... 4.4990
11.4275
4.5000
11.4300
Journal diameter-conn.
rod bearing ................................... 2.9990
7.6175
3.0000
7.6200
Journal out-of-round ...........................
.00025
.00064
.0010
.0025
Journal taper ................................
.0005
.0013
.0015
.0038
*Runout on journals-total indicator reading:
Crankshaft (mounted on No. 1 and No.7 journals):
At No. 2 and No. 6
journals ..................................
.0020
.0051
At No. 3 and No. 5
journals ..................................
.0040
.0102
At No. 4 journal ............................
.0060
.0152
Thrust washer
thickness ......................................
.1190
.3023
.1220
.3099
End play (end thrust
clearance) ....................................
.0040
.0102
.0140
.0356
.0180
.0457
* Runout tolerance given for guidance when regrinding crankshaft. When the runout on adjacent journals is in
the opposite direction, the sum must not exceed .003 inches (.008 cm) total indicator reading. When the runout
on adjacent journals is in the same direction, the difference must not exceed .003 inch (.008 cm) total indicator
reading. When high spots of the runout on adjacent journals are at right angles to each other, the sum must not
exceed .004 inches (.010 cm) total indicator reading or .002 inches (.005 cm) on each journal.
3-256
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