TM 9-2320-273-20
Table 8-2. Axles Troubleshooting Procedures.
MALFUNCTION.
TEST OR INSPECTION.
CORRECTIVE ACTION.
1.
EXCESSIVE BACKLASH:
Step 1.
Check all universal joints.
Lubricate and replace as necessary (para 8-11).
Step 2.
Check drive axle capscrews on universal joints for tightness.
Torque to 100-110 Ib-ft (136-149 N•m) (para 8-11D). If the problem persists,
notify Direct Maintenance Personnel.
2.
CONTINUOUS AXLE OR WHEEL NOISE:
Step 1.
Check lube level in axle housing.
Fill axle housing to proper level (para 8-12 for front axle or 8-13 for rear axle).
Step 2.
Check lube pump cover (forward rear axle) for visible damage. Remove and check for
clogged filter (M915 only).
a.
Replace filter as required (para 8-13).
b.
Refer problem to Direct Support Maintenance if internal pump damage is
evident.
Step 3.
Check that brake shoes are not dragging. Check for overheating of brake drum. Jack
wheel clear of ground. Use tanker bar to pry up under wheel to check for loose
bearings. Any movement of wheels indicates loose bearings. With brakes released
spin wheels to check for overly tight bearings. Wheel should spin freely and smoothly.
Remove hub and drum to check condition of bearings.
Adjust dragging brakes and clean, repack, or replace bearings as necessary (para
10-13 or 10-14, for front wheels, para 10-15 for rear wheels).
Step 4.
Visually inspect tires.
Inflate tires to proper pressure or replace if necessary (refer to TM 9-2320-273-10).
Step 5.
Check wheel balance.
Balance wheels, if necessary.
3.
LUBRICANT LEAKING:
Step 1.
Check all cover plate bolts for tightness.
8-4
