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TM 55-1740-200-14
measurement and is broken down into minimum
4-202. MANUFACTURERS FITS, TOLERANCES AND
dimension, desired dimension, maximum dimension, and
DIMENSIONS TABLE. The following table includes fits,
additional wear allowance.
tolerances, and dimensions specified by the manufacturer.
The table shows the component and point of
Table 4-6. Manufacture's Fits, Tolerances and Dimensions
ADDITIONAL
MINIMUM
DESIRED MAXIMUM ALLOWABLE
COMPONENT
POINT OF MEASUREMENT
WEAR OR
INCHES
INCHES
INCHES
CLEARANCE
Piston:
Tractor Engine
Piston land clearance
0.028
0.033
Clearance (top of skirt)
0.0015
0.0020
Length (overall)
3.687
Piston Pins:
Diameter
0.86
Length
2.75
Clearance in piston
0.0000
0.0005
Clearance in rod
0.0001
0.0002
Piston Rings:
Ring gaps (all)
.007
.015
Compression ring width
0.094
Oil ring width
0.156
Side clearance (upper)
0.0025
0.0040
Side clearance (2)
0.0020
0.0035
Side clearance (3 and 4)
0.0010
0.0025
Tappets:
Stem diameter
0.625
Clearance in block
0.0002
0.0010
Valves:
Head diameter
Intake
1.531
1.407
Length (overall)
Intake
4.845
4.78
Stem diameter
Intake
0.341
0.340
0.341
0.340
Stem to guide clearance
Intake
0.001
0.003
0.005
0.003
4-18
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