TM 5-4910-276-14
NOTE
The manufacturer's dimensions and tolerances are given in inches and Metric measurements. All Met-
ric units are enclosed in parenthese.
Table 1-1. Engine Repair and Replacement Standards
Mfr's
Desired
Maximum
Maximum
dimensions
allowable
clearance
allowable
and tolerances
in inches
wear in
clearance
in inches
(cm)
in
inches (cm)
(cm)
inches (cm)
Z Denotes replacement
Components
necessary if Mfr's
tolerances are
Minimum Maximum
Minimum Maximum
exceeded
CAMSHAFT
0.0037
0.0060
0.3780
0.0014
0.3747
0.3767
Bearing surface i.d.
(0.0601)
(0.0152)
(0.0035) (0.0093)
(0.9517)
(0.9568)
0.0037
0.0060
0.3720
0.0014
0.3730
0.3733
Camshaft axle dia.
(0.0152)
(0.0035) (0.0093)
(0.9448)
(0.9474)
(0.9481)
0.1770
0.1867
0.1827
Cam lift
(0.4495)
(0.4640)
(0.4742)
1.3247
1.3287
Cam lobe wear
(3.3748)
(3.3647)
0.0170
0.0070
End play
(0.0177)
(0.0431)
CRANKSHAFT
Main baring journals:
0.9395
0.0005T
0002T
0.0385
Front
(0.0012)
(0.0050)
(2.3837)
(2.3863)
Rear
0.9395
0.0005T
0.002T
0.9385
(0.0012)
(0.0050)
(2.3837)
(2.3863)
0.8750
0.9939
0.0053
0.8745
Connecting rod journal o.d.
(0.0099)
(0.0134)
(2.2212)
(2.2225)
0.0030
0.0000
End play
(0.0000)
(0.0070)
0.0020T
0.9380
0.0005T
0.9375
(0.0050)
(0.0012)
(2.3812)
(2.3825)
1.9697
0.0037T
0.0017T
1.9687
Bearing o.d. (cup)
(0.0093)
(5.004)
(5.0030)
(0.0043)
CONNECTING RODS
0.0053
0.8789
0.8798
0.0039
Large end i.d.
(0.0134)
(0.0099)
(2.2324)
(2.2346)
0.0015
0.4200
0.4205
Small end i.d.
0.0005
(0.0038)
(1.0668)
(1.0680)
(0.0012)
0.0015
0.4195
Piston pin diameter
0.0005
0.4190
(0.0038)
(0.0012)
(1.0642)
(1.0655)
0.040
0.0360
0.0200
Side clearance
(0.1016)
(0.0508)
(0.0914)
Piston pin clearance in bearing
(see
above)
PISTON
0.4200
0.0013
00010
Piston pin hole dia.
0.4195
0.0000
0.4203
(0.0025)
(1.0655) (1.0668)
(1.0675)
(0.0033)
(0.0000)
Skirt o.d.
2.2480
A-top
0.0025
2.2470
2.2475
0.0050
0.0015
(0.0063)
(5.7073)
(5.7086)
(5.7099)
(0.0127)
(0.0038)
0.0015
0.0030
2.2480
2.2485
2.2490
Bottom
0.0005
(00038)
(5.7099)
(0.0076)
(5.7111)
(5.7124)
(0.0127)
0.0025
2.2485
0.0050
2.2475
2.2480
B-top
0.0015
(0.0063)
(0.0127)
(5.7086)
(5.7099)
(5.7111)
(0.0038)
0.0015
2.2495
2.2485
0.0030
Bottom
2.2490
0.0005
(0.0038)
(5.7111)
(0.0076)
(5.7124)
(5.7137)
(0.0127)
2.2480
0.0025
2.2490
0.0050
2.2485
C-top
0.0015
(5.7099)
(0.0063)
(5.7111)
(5.7124)
(0.0127)
(0.0038)
2.2490
0.0030
0.0015
2.2500
2.2495
0.0005
Bottom
(5.7124)
(0.0076)
(0.0038)
(5.7137)
(5.7150)
(0.0127)
0.0025
2.2485
0.0050
2.2495
2.2490
0.0015
D-top
(0.0127)
(0.0063)
(5.7111)
(5.7124)
(5.7137)
(0.0038)
1-6