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TROUBLESHOOTING GUIDE
Tires - Wheels - Suspension
Most tire, wheel, and suspension related problems are
due to excessive loads, extreme conditions, and
improper maintenance. Tire, wheel, and suspension
problems can be easily detected and solved by checking
the following guide. For maintenance procedures, refer to
the following sections:
PROBLEM
VIBRATIONS WHILE DRIVING
RAPID TIRE WEAR/DETERIORATION:
CENTER TREAD WEAR
SHOULDER TREAD WEAR - BOTH
SHOULDERS
SHOULDER TREAD WEAR - ONE
SHOULDER
OVERALL TREAD WEAR
TIRE FLAT SPOTS
UNEVEN WEAR
RIM FAILURE*:
CRACKING
*IN ALL INSTANCES OF RIM FAILURE, REPLACE THE RIM IMMEDIATELY!
5-2
• "Hydraulic System" on page 5-7
• "Alignment" on page 4-16
• "Hub and Drum Maintenance" on page 4-25
• "Wheel Bearing Lubrication and Adjustment" on
• "Tire Maintenance" on page 4-28
PROBABLE CAUSE
Improper tire inflation
Tires cupped or have flat spots
Wheels bent or loose
Tires incorrectly mounted
Mud in wheels
Tire(s) out of balance
Brakes dragging
Object(s) stuck between duals
Over inflation
Under inflation
Overload
Axle damage
Axles not parallel
Overloading
High speeds
Incorrect dual matching
Quick stops
Grabbing brakes
Worn or loose wheel bearings
Out of balance wheels and tire
Suspension bushings worn
Worn or loose wheel bearings
Out of balance wheels and tires
Overinflated tires
High speeds
High speed cornering
Over loading
page 4-27
Inflate to proper pressure (See "Tire
Inflation" on page 4-28.)
Replace tires.
Replace or tighten.
Remount (See "Mounting Tire and
Wheel (Hub Type)" on page 4-30.)
Clean wheels.
Balance tires.
Locate cause and repair.
Remove object(s).
Deflate to correct inflation (See "Tire
Inflation" on page 4-28.)
Increase inflation to correct PSI. Check
axle alignment (See "Tire Inflation"
on page 4-28.)
Loads are above rated tire capacity. DO
NOT load above rated tire capacity.
Straighten or replace axle (See "Axle
Alignment" on page 4-18.)
Check axle alignment.
Check tire load rating.
Adjust speed according to road and load
conditions.
Properly match dual tires (See "Tire
Matching" on page 4-28.)
Adjust braking practices.
Adjust brakes properly (See "Brake
Adjustment" on page 4-21.)
Adjust or replace as needed (See "Hub
and Drum Maintenance" on
page 4-25.)
Balance wheels and tires.
Check ABS system function.
Replace bushings (See "Hub and Drum
Maintenance" on page 4-25.)
Adjust or replace as needed.
Balance wheels and tires.
Deflate tire to proper PSI.
Adjust speed according to road and load
conditions.
Adjust cornering practices.
Check rim load rating.
SOLUTION
F-618-0911 Edition
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