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 TM 9-2520-246-34-1
b.
Countershaft Assembly.
FRAME 1
NOTE
Readings must be within limits given in table 2-41. If
readings are not within given limits, throw away part
and get a new one.
1.
Measure high range gear bore (1) and high range gear keyway width (2).
2.
Measure countershaft diameter (3) in two places and two countershaft keyway
widths (4).
3.
Measure two key widths (5).
Measure low range gear bore (6) and low range gear keyway width (7).
4.
GO TO FRAME 2
Table 2-41. Countershaft Assembly Wear Limits
Size and Fit
Wear Limits
of New Parts
Index Number
(inches)
Item/Point of Measurement
(inches)
High range gear bore
1
2.3750 to 2.3760
2.3765
High range gear keyway width
2
0.5000 to 0.5032
0.5052
3
Countershaft diameter
2.3765 to 2.3775
2.3755
4
Countershaft keyway width
0.4984 to 0.5000
0.5024
5
Key width
0.5000 to 0.5012
None
Low range gear bore
6
2.3750 to 2.3760
2.3765
7
Low range gear keyway width
0.5000 to 0.5032
2.3765
2-202
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