TM-9-2520-215-34

TM 9--2520--215--34

0081 00--4

OIL PRESSURE READINGS AND FUNCTIONAL TEST (TRANSMISSION

INSTALLED IN VEHICLE) – CONTINUED

0081 00

FUNCTIONAL TEST

1. Test data logs (Figure 2) are guides for making proper tests, as well as providing spaces to record actual test

results. In addition, above each test entry space, the normal pressures are included for comparison with test

results.

2. In all tests, transmission oil must be at normal operating temperature (approximately 200 degrees F). Connect

the gages as indicated for each test in test data logs. Position range selector control and steer control as

indicated in test data log.

3. Reduce speed of transmission input to engine idle speed before engaging desired range. Slowly increase speed

to desired input speed. Record readings for each test.

4. Do not attempt to install gages while transmission is operating. Reinstall plugs immediately upon removing

gages.

5. When making test for steer clutch pressure, move steer control from center to full steer while observing pressure

rise. Pressure should rise to maximum as control is moved fully to steer position.

6. In test for lockup engagement, increase speed slowly until lockup apply pressure shows on gage. The gage

connected at location 9 (Figure 1) should read no pressure until lockup engages. At moment pressure shows on

gage at location 9, record the input speed.

7. In test for lockup release, first increase input speed to above where lockup occurs. Slowly reduce speed until

applied pressure at location 9 (Figure 1) drops quickly. At this moment, record input speed.

8. When tests are completed, remove gages and install plugs, install retainer (4) removed in Step 2 of Oil Pressure

Readings. Check transmission for leakage, repair as needed.

TM-9-2520-215-34 - Page 460 of 508