TM-9-2520-246-34-1
TRANSMISSION MODEL 3053A; TRANSMISSION TRANSFERS MODEL T-136-21 AND MODEL T-136-27; POWER TAKEOFFS MODEL WN-7-28, MODEL WND-7-28 AND MODEL P-136-C
TECHNICAL MANUAL; MAINTENANCE, DIRECT SUPPORT AND GENERAL SUPPORT LEVEL
JANUARY 1981
TM-9-2520-246-34-1 - Page 25 of 418
TM 9-2520-246-34-1
FRAME 3
1.
2.
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
Index Number
1 and 2
1 and 3
4 and 5
Item/Point of Measurement
First-reverse gear to counter-
shaft first gear
First-reverse gear to reverse
idler gear
Second-reverse gear to
reverse idler gear
Size and Fit
of New Parts
(inches)
0.008L to 0.014L
0.008L to 0.0146L
0.006L to 0.012L
Wear Limit
(inches)
0.019L
0.019L
O.019L
2-5
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