TM-9-2320-386-24-1-2

2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; EXTENDED SERVICE PROGRAM (ESP); UNIT, DIRECT SUPPORT AND GENERAL SUPPORT; MAINTENANCE MANUAL; VOLUME 2 OF 2

MAY 2001
TM-9-2320-386-24-1-2

  TM-9-2320-386-24-1-2 - Page 22 of 636

Direct Support Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
26. VEHICLE MOVES IN NEUTRAL
Perform malfunction 22.
END OF TESTING!
27. NO RESPONSE TO SHIFT LEVER MOVEMENT
Remove transmission (WP 0335 00), and notify GS maintenance to rebuild transmission.
END OF TESTING!
28. TRANSMISSION LEAKS OIL
Remove transmission (WP 0335 00), and notify GS maintenance to rebuild transmission.
END OF TESTING!
29. TRANSMISSION NOISY
Remove transmission (WP 0335 00), and notify GS maintenance to rebuild transmission.
END OF TESTING!
TRANSFER CASE
30. TRANSFER CASE WILL NOT OPERATE FRONT DIFFERENTIAL
Step 1. Check sprag air cylinder operation (TM 9-2320-246-34-1) and test using outside air source,
with engine stopped.
If sprag air cylinder operation is defective, replace sprag cylinder (TM 9-2320-361-34).
Step 2. With air tanks full and engine off, loosen air lines at sprag air cylinder and listen for sprag
clutch engagement in transfer sprag unit.
a. If forward and reverse sprag engagements are not heard, replace transfer sprag air
cylinder (TM 9-2320-361-34).
b. If sprag engagement is heard, repair sprag unit in transfer case (TM 9-2320-246-34-1).
END OF TESTING!
31. TRANSFER CASE WILL NOT OPERATE REAR DIFFERENTIAL
Step 1. Confirm transmission-to-transfer propeller shaft turns.
a. Proceed to step 2 if transmission-to-transfer propeller shaft can be turned with
transmission and transfer assembly in NEUTRAL.
b. If transmission-to-transfer propeller shaft will not turn with transmission and transfer
assembly in NEUTRAL, repair or replace transfer case (TM 9-2320-361-34).
Step 2. Confirm transfer-to-forward rear axle propeller shaft can be turned. Place transfer shifter
into NEUTRAL and raise both rear wheels on one side of vehicle (TM 9-2320-361-20).
a. Remove and repair transfer assembly if propeller shaft turns (TM 9-2320-361-34).
b. If rear axle propeller shaft will not turn, proceed to differential and rear axle mechanical
troubleshooting sections of TM 9-2320-361-20. If propeller and axles turn freely, replace
transfer case (TM 9-2320-361-34).
END OF TESTING!
32. TRANSFER CASE LEAKS OIL
Check and verify approximate location of oil leak(s).
a. If transfer case front output shaft cover gasket is leaking, remove transfer case and
replace gasket (TM 9-2320-361-34).
b. If transfer case housing gasket is leaking, remove transfer case and replace gasket
(TM 9-2320-361-34).
c. If transfer case input flange oil seal is leaking, replace seal (TM 9-2520-246-34-1).
TM 9-2320-386-24-1-2
0293 00
0293 00-8


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