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TM 10-3930-643-20
WHEEL TROUBLESHOOTING AND MAINTENANCE. (cont)
9 - 1.
Wheel Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
a. TIRE WEARING UNEVENLY.
Before raising axle off ground, insure that shipping lock pin is
installed. Failure to do so may cause vehicle to turn and
s l ip
o f f
jackstands causing SERIOUS INJURY or DEATH. If you are injured by
falling equipment, obtain medical aid immediately.
Place wood block at each wheel to prevent vehicle moving. Install
shipping lock pin in chassis. Place parking brake in RELEASED position
after running engine to build up air pressure.
Raise one axle and
wheels off ground.
If tires show excessive wear or bruising, refer to TM 9-2610-200-24
f o r r e p a i r .
b .
WHEEL WOBBLES.
Step 1.
Check wheel mounting bolts for tightness.
If mounting bolts are loose, tighten to 280 to 300 lb-ft.
Step 2.
Raise one axle and wheel off ground, refer to MALFUNCTION a,
above.
Rotate wheel by hand while listening for a rumbling or
grinding sound within axle.
Repeat for other wheel and axle.
If rumbling or grinding sound is heard, notify Direct Support.
Step 3. With wheel off ground, check wheel bearing adjustment by using
pry bar to check for any noticeable end play.
If there is any noticeable end play, notify Direct Support.
Step 4.
Remove wheel and tire assembly and disassemble.
C h e c k f or
foreign material or damage, refer to paragraph 9-2.
Remove foreign material and replace tire if damaged.
9-2
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