TM 10-3930-641-34-1
TRANSFER GEAR CASES AND DRIVE LINE COMPONENTS TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. SYSTEM LOSES OIL
Step 1. Check drain plug.
Tighten drain plug.
Step 2. Check for loose housing bolts.
Tighten housing bolts.
Step 3. Check for leaking gaskets.
Replace gaskets. (See page 4-124.)
Step 4. Check for defective oil seals.
Replace oil seals. (See page 4-124.)
Step 5. Check for cracked transfer gear cases.
Replace transfer gear cases. (See page 4-124.)
2. NOISY TRANSFER GEARS
Step 1. Inspect transmission oil level.
Add oil. (See LO 10-3930-641-12.)
Step 2. Inspect main drive shaft universal joints.
a.
Tighten capscrews on connections.
b.
Replace drive shaft if universal joints are damaged. (See pages 4-306, 4-308.)
c.
Check drive shaft support bearings.
Replace if damaged. (See pages 4-306, 4-308.)
Step 3. Remove, disassemble, and inspect transfer gears.
Repair as necessary. (See page 4-119.)
3. FRONT OR REAR DIFFERENTIAL IS INOPERATIVE
Step 1. Check oil levels.
a.
Inspect for oil leaks from worn seals, gaskets or cracked cases.
Repair or replace as necessary. Add oil. (See LO 10-3930-641-12.)
b.
Inspect breather.
Replace if plugged. (See TM 10-3930-641-20.)
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