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Direct Support Mechanical Troubleshooting - continued - TM-9-2320-386-24-1-20031
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/.5ton/TM-9-2320-386-24-1-2 Extended Service Program (ESP) for 2-1/2-Ton 6x6 M44A3 Series Trucks (Diesel) Manual
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Direct Support Mechanical Troubleshooting - continued - TM-9-2320-386-24-1-20033
TM 9-2320-386-24-1-2
0293 00
Direct Support Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
d.
If transfer case front output flange oil seal is leaking, replace seal (TM 9-2520-246-34-1).
If transfer case input shaft bearing cover gasket is leaking, replace gasket (TM 9-2520-246-34-1).
e.
f.
If transfer case rear output bearing cover gasket is leaking, replace gasket (TM 9-2520-246-34-1).
g.
If countershaft rear bearing cover gasket is leaking, remove transfer case and replace
gasket (TM 9-2320-361-34 and TM 9-2520-246-34-1).
h. If rear output shaft oil seal is leaking, remove transfer case (TM 9-2320-361-34) and
replace seal (TM 9-2520-246-34-1).
i. If rear output shaft bearing retainer gasket is leaking, remove transfer case (TM 9-2320-
361-34) and replace gasket (TM 9-2520-246-34-1)
j. If top cover gasket is leaking, replace (TM 9-2520-246-34-1).
k. If transfer case oil leak(s) continues, remove transfer case (TM 9-2320-361-34) and
disassemble (TM 9-2520-246-34-1). Check transfer housing halves for defects. Replace
defective components (TM 9-2520-246-34-1).
END OF TESTING!
33. TRANSFER CASE NOISY
Step 1. Drain transfer case fluid (WP 0023 00) and check for signs of broken gears, metal shavings,
If broken gears, metal shavings, or contamination are found in transfer case or on magnetic
drainplug, repair or replace transfer case (TM 9-2320-361-34).
Step 2. Check transfer case operation in HIGH and LOW range and in NEUTRAL.
If transfer case is defective, repair or replace (TM 9-2320-361-34).
END OF TESTING!
34. TRANSFER CASE GRINDS OR POPS OUT OF GEAR DURING NORMAL VEHICLE OPERATION
Replace and repair transfer case (TM 9-2320-361-34).
END OF TESTING!
DIFFERENTIAL
35. DIFFERENTIAL NOISY
Step 1. Check transfer case operation and noise (malfunction 33).
Step 2. Check differential operation. Remove differential drive propeller shaft(s) (WP 0146 00). Raise
wheels (TM 9-2320-386-10) and manually turn wheels and observe differential operation.
If tires still will not rotate, remove differential assembly and replace and repair
(TM 9-2320-361-34).
END OF TESTING!
36. DIFFERENTIAL CLUNKS DURING TURNS OR INITIAL TAKEOFF
Check differential internal operation. Remove differential and disassemble (TM 9-2320-361-34).
Replace and repair defective components (TM 9-2320-361-34).
END OF TESTING!
37. DIFFERENTIAL LEAKS OIL
Step 1. Check differential shafts seals condition. Inspect for presence of gear oil at gaskets and
companion flange areas.
a. If oil is present, replace seals and gaskets (TM 9-2320-361-34).
b. If repeated seal replacement does not correct problem and leak continues, remove
differential (TM 9-2320-361-34).

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