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TM 9-2320-285-24-1
2-55. WHEELS AND TIRES TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
NOISY OR BUMPING SOUND WHILE TRAVELING (Cont)
Step 2. If sound is coming from front axle, check shock absorbers for cracks, scored rod, or leakage. Check
spacers for wear or damage.
a.
If shock absorbers are cracked, leaking fluid, or if rod is scored, replace (para 2-64); if spacers
are worn or damaged, replace (para 2-64).
b.
If shock absorbers and spacers are okay, go to step 3 below.
Step 3. If sound is coming from front axle, check rubber block for damage.
a.
If rubber block is damaged or worn, replace (pars 2-64).
b.
If rubber block is not damaged or worn, go to step 4 below.
Step 4. Place wood blocks at each wheel to prevent tractor from moving.
Raise one axle and wheels off ground.
Release parking brake; then rotate wheel by hand while listening for a rumbling or grinding sound.
Repeat for other axle.
a.
If rumbling or grinding sound is heard, go to step 5 below.
b.
If rumbling or grinding sound is not heard, go to step 6 below.
Step 5. Check front axle hub or rear axle lubrication level.
a.
If level is low, add lubricant (pars 2-43a or 2-44a).
b.
If level is not low, go to step 7 below.
Step 6. With wheel off ground (step 4 above), check wheel bearing adjustment (use pry bar to check for
noticeable end play).
a.
If there is noticeable end play, adjust wheel bearing (para 2-43b for front axle; para 2-44b for rear
axle).
b.
If there is no noticeable end play, go to step 7 below.
Step 7. Check front and rear axle wheel bearings for damage.
a.
If wheel bearing is damaged, replace (para 2-43b for front axle; para 2-44b for rear axle).
b.
If wheel bearing is not damaged, go to step 8 below.
2-645

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