TM-9-2520-234-35

POWER TRAIN ASSEMBLY; ALLISON MODEL XTG411-2A

TECHNICAL MANUAL; FIELD AND DEPOT MAINTENANCE MANUAL

JULY 1962

TM-9-2520-234-35 - Page 232 of 323

CHAP

5,

SEC

XXXI V

TESTS AND ADJUSTMENT S

PAR

23 4

(c ) With the brakes fully applied, ob-

(d ) Install inspection cover gaskets,

serve the position of the marks on the levers

inspection covers, lock washers and bolts.

in relation to the marks on the bearing retainer.

(d ) If the index marks on the levers

rotate to the Apply mark on the retainer but

not to the Readjust mark, the brakes are satis-

factorily adjusted.

(e ) If the index marks on the levers

do not rotate to the Apply mark or if they ro-

tate to the Readjust mark, the brakes must be

readjusted.

(f )

To adjust the brakes, remove the

inspection covers at the rear of the transmis-

sion rear housing and rotate the adjusting nuts

by inserting a screwdriver in the slots in the

nuts (refer to fig. 371). Clockwise rotation

will shorten the lever travel (tighten brakes).

Counterclockwise rotation will lengthen the

lever

travel

(loosen

brakes).

Adjust

both

brakes uniformly so that, with brakes fully

applied, both marks on the levers aline with

the Apply mark on the bearing retainer. Re-

place inspection covers.

Note . If the brake linkage is not in-

stalled, the brakes may be adjusted

using the same procedures as out-

lined in (a ) through (f), above, except

that wrenches 8351386 and 8351387

may be used to apply the brakes (fig.

370). The brakes should be applied

with approximately 90 pound-fee t

torque.

(2) New or rebuilt power train not in

vehicle.

(a ) Remove inspection covers from the

rear of the transmission rear housing.

(b ) Insert gage 8351213 into the slot

in the brake anchor, ring, and between the

brake apply-rotating ring and the first brake

plate (fig. 371).

(c ) Rotate the adjusting nut until gage

8351213 is snug between the apply ring and

brake plate.

The adjustment must neither

bind the gage nor leave it loose. Adjust both

brakes by this method.

c. Shift Control Linkage

—

(1) The linkage, connecting the selector

valve shaft (fig. 368) with the operator’s shift

control, should be adjusted carefully. When

the detent in the control valve assembly is

seated, the power train is in the range to which

the shift indicator points. The operator’s con-

trol must be in a corresponding position.

(2) To adjust the linkage, disconnect it

at one point.

Place the control valve in neutral

so that the detent seats and place the operator’s

shift control in neutral position. Adjust the

linkage so that it can be reconnected without

moving either the control valve or operator’s

shift

control.

Try the control through all

range positions, making sure that the detent

seats in each.

d . Steer Control Linkage

(1) Proper adjustment of the steer link-

Figure

371.

Adjusting transmission brake

20 0