Table 2-2. Transmission Reverse Speed Backlash Wear Limits

TM 9-2520-246-34-1

FRAME 3

NOTE

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

letter L indicates a loose fit. If readings are not within

given limits, throw away both gears and get new ones.

Some gears on the countershaft cannot be taken off. If

these gears are damaged, throw away countershaft and

get a new one.

Slide first-reverse gear (1) forward to mesh with countershaft first gear (2).

Measure backlash between two gears.

Slide first-reverse gear (1) back to mesh with reverse idler gear (3). Measure

backlash between two gears. Slide first-reverse gear forward so that it is not

meshed with any gears.

Measure backlash between second-reverse gear (4) and reverse idler gear (5).

END OF TASK

Table 2-2. Transmission Reverse Speed Backlash Wear Limits

Size and Fit

of New Parts

Wear Limit

Index Number

Item/Point of Measurement

(inches)

First-reverse gear to counter-

1 and 2

0.008L to 0.014L

0.019L

shaft first gear

First-reverse gear to reverse

1 and 3

0.008L to 0.0146L

0.019L

idler gear

Second-reverse gear to

4 and 5

0.006L to 0.012L

O.019L

reverse idler gear

2-5