FRONT AND REAR AXLE TANDEMS

9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

2-15. TROUBLESHOOTING INSTRUCTIONS (CONT).

Table 2-9. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

FRONT AND REAR AXLE TANDEMS

NOISY DRIVE AXLE.

Step 1. Check lubricant level in differentials (LO 9-2320-279-12).

Add lubricant as required (LO 9-2320-279-12).

Step 2. Drain axle differentials (LO 9-2320-279-12). Check bottom magnetic drain plug for metal

particles when draining.

If metal particles are small, like metal filings, replace lubricant (LO 9-2320-279-12).

If metal particles are larger than filings, notify the supervisor.

Step 3. Check drive pinion yoke for looseness.

If looseness is found, notify the supervisor.

Step 4. Check wheel bearings. Jack wheel off ground (TM 9-2320-279-10). Put pinch bar under tire

to raise tire and check for play in wheel bearings. Turn wheel and check for roughness in

wheel bearings.

If roughness or looseness is detected, adjust or replace bearings (para 12-2 or 12-3).

Step 5. Test drive vehicle on and off roads. Listen for grinding or rumbling noise when driving and

turning.

If there is noise when turning, notify the supervisor.