Table 2-42. Countershaft Assembly Fits and Tolerances

TM 9-2520-246-34-1

FRAME 2

NOTE

Readings must be within limits given in table 2-42. The

letter L indicates a loose fit and the letter T indicates a

tight fit. If readings are not within given limits, throw

away part and get a new one.

Measure fit of two gears (1) on countershaft (2) in two places.

Measure fit of two keys (3) in two countershaft keyways (4).

Measure fit of two keys (3) in two gear keyways (5).

END OF TASK

Table 2-42.

Countershaft Assembly Fits and Tolerances

Size and Fit

of New Parts

Wear Limit

(inches)

Item/Point of Measurement

Index Number

O.OO1OL

0.0005 to 0.0025T

Fit of gear on countershaft

1 and 2

0.0052L

0.000T to 0.0032L

3 and 4

Fit of key in shaft keyway

0.0024L

0.0028 to 0.0004L

Fit of key in gear keyway

3 and 5

2-203