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Page Title:
Table 4-1. Engine Fits, Tolerances, and Wear Limits-continued |
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 TM 5-4320-258-34
Manufacturer
dimensio
Design
clearanc
Allowable
's
ns
es
Component points of measurement
and
in inches
in
inches
wear or
tolerances
Minimum
Maximu
Minimu
Maximu
clearance
m,
m
m
Piston rings
Width
No. 1
0.1230
0.1240
0.1210
No. 2 and 3
0.1235
0.1240
0.1215
No. 4
0.2485
0.2490
0.2465
Gap
No. 1
0.0070
0.0170
No. 2 and 3
0.0070
0.0170
No. 4
0.0070
0.0170
Side clearance
No. 1
0.0035
0.0050
No. 2 and 3
0.0035
0.0055
No. 4
0.0030
0.0045
Piston pin
Length
2.8050
2.8150
Pin diameter
0.8591
0.8593
0.8607
Piston pin bushing diameter
0.8595
0.8597
0.8067
Piston pin fit in piston
Light
Push
Piston pin fit in rod
0.0002
0.0006
Valve spring (intake and exhaust)
Weight required to compress to 1
47 lb
53 lb
42 lb
45/64 in.
Weight required to compress to 1
96 lb
104 lb
86 lb
27/64 in.
4-3
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