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 227 of 323

PAR 230-233

TEST AND ADJUSTMENTS

CHAP 5, SEC XXXIV

Section XXXIV. TEST AND ADJUSTMENTS

230. GENERAL

a . The tests described in this section

will determine if the functional operation

of the transmission is satisfactory. These

tests may be made after rebuild or at any

time to determine the condition of the

transmission. The tests may be made while

the transmission is installed in a vehicle or

on a properly equipped test stand.

b . These tests will determine wheth-

er or not the clutches, torque converter,

gearing and hydraulic system are perform-

ing properly.

c . Adjustments of transmission com-

ponents and control linkage must be cor-

rect when tests are performed (or cor-

rected during tests).

When tests are made

in the vehicle, the vehicle engine must be

properly adjusted and performing effici-

ently. Refer to the engine technical man-

ual for engine test and adjustment proce-

dures. Refer to pars. 233 and 234, below,

for transmission test and adjustment pro-

cedures.

231. TEST EQUIPMENT

a . Transmission Installed in Vehicle.

The following equipment

testing the transmission

stalled in a vehicle.

(1) Tachometer

gine speed (transmission

revolutions per minute.

is required when

while

it

is

in-

to indicate en -

input speed) in

(2) Oil pressure gage with a range

from 0 to 500 psi.

b . Transmission Installed on Tes t

Stand. In addition to a properly equipped

test stand with a means for driving a

transmission (motor or engine of approxi-

mately 275 horsepower) and the equipment

listed in a , above, the following equipment

is required:

(1) Shift selector linkage an d

(2) Stee r

control linkage an d

manual control for operating steer control

valve.

(3) External oil cooler.

(4) Control for varying the trans-

mission input speed (engine throttle or

variable speed electric motor control).

c . Test Data Log Sheet. A simple

test data log sheet for recording trans-

mission performance is illustrated in fig.

367.

232. OIL PRESSURE READINGS

Use the oil pressures listed in the test

data log sheet as normal values in testing

the transmission.

233. TESTS

a . Preliminary Instructions.

When

testing the transmission in a vehicle,

the left-outpu t

and the right-outpu t

drive

assemblies will have to b e

manual control for shifting through all

Figure 366. Measuring transmission

ranges.

oil level

Change 2 195