Symptom Chart

Condition(s):


UNEVEN TIRE WEAR.
Possible Source(s):
^ Incorrect tire inflation.
Action(s) to take:
- Correct to specification.

Possible Source(s):
^ Excessive radial and lateral runout.
Action(s) to take:
- Renew tire or wheel.

Possible Source(s):
^ Out of specification steering geometry.
Action(s) to take:
- GRealign steering geometry.

Possible Source(s):
^ Worn ball joint.
Action(s) to take:
- Renew damaged component, realign steering geometry.

Possible Source(s):
^ Worn tie-rod end.
Action(s) to take:
- Renew component, realign steering geometry.

Possible Source(s):
^ Incorrect tire/wheel usage.
Action(s) to take:
- Install correct tire and wheel combination.

Possible Source(s):
^ Loose or leaking shock absorbers.
Action(s) to take:
- Tighten or Renew as necessary.

Possible Source(s):
^ Suspension geometry out of alignment.
Action(s) to take:
- Check and adjust.

Possible Source(s):
^ Loose, worn or damaged suspension components.
Action(s) to take:
- Inspect, Repair or Renew as necessary.

Possible Source(s):
^ Wheel and tire assembly out of balance.
Action(s) to take:
- Balance wheel and tire assembly.

Possible Source(s):
^ Excessive lateral or radial runout of wheel or tire.
Action(s) to take:
- Check, Repair or Renew as required.

TIRES SHOW EXCESS WEAR ON EDGE OF TREADS.
Possible Source(s):
^ Tires under-inflated.
Action(s) to take:
- Correct pressure to specification.

Possible Source(s):
^ Vehicle overloaded.
Action(s) to take:
- Correct to specification.

TIRES SHOW EXCESS WEAR ON EDGE OF TREADS (WITH TIRE PRESSURES CORRECT).
Possible Source(s):
^ Incorrect toe setting.
Action(s) to take:
- Set to specification.

TIRES SHOW EXCESS WEAR IN CENTER OF TREAD.
Possible Source(s):
^ Tires over-inflated.
Action(s) to take:
- Correct pressure to specification

WHEEL MOUNTING IS DIFFICULT.
Possible Source(s):
^ Incorrect application or mismatched parts, including wheel studs and wheel nuts. Corroded, worn or damaged parts.
Action(s) to take:
- Follow the manufacturers specifications. Clean or Renew.

WOBBLE OR SHIMMY AFFECTING WHEEL RUNOUT
Possible Source(s):
^ Damaged wheel (eventually damaging wheel bearings and causing uneven tire wear).
Action(s) to take:
- Inspect wheel rims for damage and runout. Renew as required.

VEHICLE VIBRATIONS FROM WHEELS AND TIRES.
Possible Source(s):
^ Tires/wheels mismatched.
Action(s) to take:
- Install correct tire/wheel combination.

Possible Source(s):
^ Inflation pressure too high or low.
Action(s) to take:
- Correct pressure to specification

Possible Source(s):
^ Uneven tire wear.
Action(s) to take:
- Refer to Testing and Inspection.

Possible Source(s):
^ Wheel and tire assembly imbalance.
Action(s) to take:
- Balance wheel and tire assembly.

Possible Source(s):
^ Brake disc imbalance.
Action(s) to take:
- Check brake disc cooling fins for mud and foreign material. Check for damage or disc heavy spot.

Possible Source(s):
^ Damaged or distorted wheel.
Action(s) to take:
- Renew wheel.

Possible Source(s):
^ Excessive radial run-out of wheel or tire.
^ Excessive lateral run-out of wheel or tire.
Action(s) to take:
- Renew wheel or tire.

Possible Source(s):
^ Incorrectly seated tire.
Action(s) to take:
- Remount the tire.

Possible Source(s):
^ Loose wheel mountings: damaged wheel studs, wheel nuts, worn or broken wheel hub face or foreign material on mounting faces.
Action(s) to take:
- Tighten or Renew worn or damaged parts. Clean mounting surfaces.

Possible Source(s):
^ Defective wheel bearings.
Action(s) to take:
- Renew worn or damaged bearing sets.

Possible Source(s):
^ Water in tires.
Action(s) to take:
- Remove water.

DAMAGED WHEEL STUD THREADS.
Possible Source(s):
^ Sliding wheel across the wheel studs during installation. Loose wheel nuts.
Action(s) to take:
- Renew wheel studs.

BROKEN WHEEL STUDS.
Possible Source(s):
^ Loose or overtightened wheel nuts.
Action(s) to take:
- Renew wheel studs.

CORROSION/CONTAMINATION STREAKS FROM WHEEL STUD HOLES.
Possible Source(s):
^ Loose wheel nuts.
Action(s) to take:
- Check complete assembly. Renew damaged parts. Apply correct torque setting.

DAMAGED WHEEL NUTS.
Possible Source(s):
^ Loose wheel assembly.
^ Over-tightened wheel nuts.
Action(s) to take:
- Renew wheel nuts. Apply correct torque setting.

SEIZED WHEEL NUTS.
Possible Source(s):
^ Corrosion
Action(s) to take:
- If corrosion is light, wire brush away corrosion. If corrosion is excessive renew wheel studs and wheel nuts. Lubricate the first three threads of wheel studs with a graphite based lubricant.

CAUTION: Do not permit lubricant to contaminate wheel hub stud holes or wheel nut seats.