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 230 of 323

CHAP 5, SEC XXXIV

TEST AND ADJUSTMENTS

PAR 23 3

Figure 368. Transmission oil pressure check points and controls

Figure 369. Checking transmission

oil pressure

(7) In tests for lockup release,

first increase the input speed to above the

Point where lockup occurs. Then slowly

reduce the speed, while observing lockup

clutch apply pressure, until lockup pres-

sure drops quickly. At this moment, record

governor pressure and input speed.

(8) During all tests, when the

output couplings at the right and left sides

of the power train are disconnected from

the output drive assemblies, observe the

couplings to check their rotation. Rota-

tion should be as outlined in f, below.

f . Rotation of Power Train Outputs

(1) In all forward and reverse

gears, both the output couplings wil l

tend to rotate even at engine idl e

speeds.

A light application of th e

198 Change 2