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 201 of 418

TM 9-2520-246-34-1

FRAME 3

NOTE

Readings must be within limits given in table 2-21. 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.

1.

Measure fit of two gears (1) on two countershaft gear surfaces (2).

2.

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

3.

Measure fit of two bearings (5) on two countershaft bearing surfaces (6).

END OF TASK

Table 2-21.

Countershaft Assembly Fits and Tolerances

Index Number

1 and 2

3 and 4

5 and 6

Item/Point of Measurement

Fit of gear on shaft

Fit of key in keyway

Fit of bearing on shaft

Size and Fit

of New Parts

(inches)

0.0005T to 0.0025T

0.0010L to 0.0020T

0.0005T to 0.0015T

Wear Limit

(inches)

0.0010L

.0030L

None

2-181