TM 9-2320-272-24-1
Table 2-2. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
FRONT AND REAR AXLES
40. CONTINUOUS AXLE OR WHEEL NOlSE
Step 1. Check to see if front wheel drive is engaged.
Disengage front wheel drive when traveling on hard surfaces.
Step 2. Check for loose or missing wheel stud nuts.
a. Tighten stud nuts 400-425 lb-ft (542-576 Nm).
b. Replace missing stud nuts (para. 3-224).
Step 3. Check lubrication level in axle housing and differential (LO 9-2320-272-12).
Fill axle housing or differential to proper level if necessary (LO 9-2320-272-12).
Step 4. Check for loose or damaged wheel bearings.
a. Raise vehicle wheels off ground and support with jack stands.
b. Use prybar to lift up on bottom of tire. Excessive play indicates improperly adjusted or
damaged bearings.
c. If excessive play is present, adjust or replace wheel bearings (para. 3-225).
END OF TESTING!
41. OIL LEAKlNG FROM FRONT WHEEL DRIVE LOCK-IN SWITCH
Step 1. Disconnect air line from cylinder and check for oil in line.
Step 2. If oil is present in line, notify DS maintenance.
END OF TESTING!
42. DlFFERENTlAL NOISY
Step 1. Perform malfunction 40.
Step 2. Check differential operation. Remove differential propeller shaft(s) (para. 3-148, 3-149,
3-150, or 3-151). Raise wheels (TM 9-2320-272-10), manually turn wheels, and observe
differential operation.
a. If tires will not rotate, check brakeshoe condition and operation (para. 3-176).
b. Remove brakedrums (para. 3-177). If brake system components are defective, repair or
replace (chapter 3, section IX), or notify DS maintenance.
c. If tires will still not rotate, notify DS maintenance.
d. If tire rotation drags at some points during full rotation, remove and inspect axle shafts
(para. 3-154 or 3-157).
e. If defective, replace axle shafts (para. 3-154 or 3-157).
END OF TESTING!
43. DlFFERENTlAL CLUNKS DURING TURNS OR INlTlAl TAKEOFF
Step 1. Check condition of differential propeller shaft(s) and universal joint(s) (para. 3-154, 3-148,
3-149, 3-150, or 3-151).
Repair or replace defective components (para. 3-154, 3-148, 3-149, 3-150, or 3-151).
Step 2. Check front axle shafts and universal joints for defects (para. 3-154).
Repair or replace defective components (para. 3-154).
Step 3. If internal problem exists in differential, notify DS maintenance.
END OF TESTING!
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