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5-2 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 see Sections 4-4, 4-7, 4-9, 4-10, 4-11 .
SYMPTOM
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!
BENDING OR WARPING
5-2
PROBLEM: REMEDY
Improper tire inflation: inflate to proper pressure.
Tires cupped or have flat spots: replace tires.
Wheels bent or loose: replace or tighten.
Tires incorrectly mounted: remount.
Mud in wheels: clean wheels.
Tire(s) out of balance: balance tires.
Brakes dragging: locate cause and repair.
Object(s) stuck between duals: remove object(s).
Over inflation: deflate to correct inflation.
Under inflation: increase inflation to correct PSI.
Axle damage: straighten or replace axle.
Overloading: check tire load rating.
High speeds: adjust speed according to road and load condi-
tions.
Incorrect dual matching: properly match dual tires.
Quick stops: adjust braking practices.
Grabbing brakes: adjust brakes properly.
Worn or loose wheel bearings: adjust or replace as needed.
Out of balance wheels and tire: balance wheels and tires.
Undercarriage bushings worn: replace bushings.
Worn or loose wheel bearings: adjust or replace as needed.
Out of balance wheels and tires: balance wheels and tires.
Overinflated tires: deflate tire to proper PSI.
High speeds: adjust speed according to road and load condi-
tions.
High speed cornering: adjust cornering practices.
Over loading: check rim load rating.
Curb-hopping or potholes: adjust turning practices and ad-
just speed accordingly with road conditions.
Improper tightening sequence: follow proper tightening se-
quence. (See Figure 4-19.)
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