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TM 5-4210-220-12
Table 4-2 UNIT TROUBLESHOOTING - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
14c LUBRICANT LEAKS THROUGH AXLE SHAFTS
Step 1. Check axle housing vent system for restrictions.
Inspect and correct, (see para. 4-30 or 4-32).
Step 2. Sample lubricant.
Drain and fill with correct lubricant.
Step 3. Check lubricant level.
Drain as required.
Step 4. Worn or incorrectly installed axle shaft oil seal.
Replace oil seal, (see para. 4-30 or 4-32).
14d LUBRICANT LEAKS AT AXLE PINION SHAFTS
Step 1. Sample lubricant.
Drain and fill with correct lubricant.
Step 2. Check lubricant level.
Drain as required.
Step 3. Check axle vent system for restrictions.
Inspect and correct.
Step 4. Check if drive yoke loose on pinion shaft.
Tighten yoke, (see para. 4-30 or 4-32).
14e AXLE DOES NOT ENGAGE DIFFERENTIAL LOCK-UP
Step 1. Check for broken or pinched air line.
Check and replace.
Step 2. Check if lock-up air chamber diaphragm is broken or chamber has internal damage.
Replace air chamber, (see para. 4-30 or 4-32).
Step 3. Air switch defective.
Replace switch, (see para. 4-24).
4-56
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