TM 9-2320-260-20
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
30. TRANSFER CASE NOISY OR VIBRATES EXCESSIVELY
Step 1. Check transfer case fluid level (LO 9-2320-260-12).
Fill to proper level (LO 9-2320-260-12).
Step 2. Drain transfer case fluid (LO 9-2320-260-12) and check for metal contamination.
If evidence of metal contamination is found, notify your supervisor.
END OF TESTING!
31. TRANSFER CASE WILL NOT SHIFT
Inspect shift linkage for improper adjustment, bends, breaks, and missing parts.
Adjust or replace damaged parts (para. 6-4).
END OF TESTING!
32. FRONT WHEEL DRIVE WILL NOT ENGAGE OR DISENGAGE
Inspect transfer case declutch piping for leaks, kinks, and damage.
Replace if damaged (para. 6-3).
END OF TESTING!
33. TRANSFER CASE OIL LEAKAGE
Step 1. Check drainplug for leaks.
Tighten drainplug if leaking.
Step 2. Check breather for restrictions and damage.
Clean restricted breather or replace if damaged (para. 6-5).
END OF TESTING!
PROPELLER SHAFTS
34. PROPELLER SHAFT VIBRATION OR NOISE
Step 1. Inspect propeller shaft for foreign material or damage.
Clean foreign material from propeller shaft or replace if damaged (para. 7-2 or 7-4).
Step 2. Inspect propeller shaft for loose screws or nuts.
Tighten any loose screws or nuts.
Step 3. Check universal joints for play or looseness.
If rust is visible around U-joint, disassemble and inspect. Replace U-joint if damaged
Step 4. Inspect center bearing (if equipped) for looseness or damage.
Tighten if loose. Replace if damaged (para. 7-6).
Step 5. Check grease fittings for clogs and lubricate U-joints (LO 9-2320-260-12).
END OF TESTING!
FRONT AND REAR AXLES
35. AXLES LEAKING OIL
Step 1. Check condition of axle seals and flange gaskets (if used). Inspect drum area for presence
of gear oil. Replace axle seals if gear oil is present in or on brake drum (para. 7-11 [front],
or 7-12 [rear]).
Step 2. Check companion flange areas for presence of gear oil at gaskets.
If gear oil is present, notify your supervisor.
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