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SUSPENSION
16
5. DIAGNOSIS
FRONT SUSPENSION & REAR SUSPENSION
Always road test the vehicle first before coming to any conclusion, Do some preliminary visual inspection and
correct any defects if found.
1. Inspect the tyre pressures and tyre wear.
2. Lift the vehicle using two post lift and inspect front and rear suspension for loose or damaged parts.
3. Rotate the wheels and check for out-of round tyres, bent rims, loose or rough wheel bearings.
4. Detailed inspection of parts / sub assembly of rear suspension is given in Inspection Section.
CONDITION
PROBABLE DEFECT
CORRECTIVE ACTION
Directional Instability
and Vehicle Pulling
1. Mismatched / uneven tyre wear.
2. Cracked / broken or sagging
springs.
3. Improper tyre inflation.
4. Misaligned
front
wheel
geometry/rear wheel geometry.
5. Loose, bent or broken suspension
parts.
1. Check and adjust front wheel
alignment / rear wheel
geometry.
2. Adjust tyre pressure.
3. Replace tyre.
4. Replace spring.
5. Tighter or replace suspension
parts.
Unusual Excessive Tyre Wear 1. Sagged springs or set springs.
2. Tyres imbalanced.
3. Faulty strut.
4. Misaligned front and rear wheel
geometry.
5. Vehicle over loaded.
6. Loose or worn out wheel bearing.
7. Tyre inflation not proper.
1. Replace spring.
2. Balance or replace tyres.
3. Replace Strut.
4. Adjust the wheel alignment at
front / rear ends.
5. Check loading.
6. Replace wheel bearing.
7. Adjust tyre pressure.
Wheel Tramp
1. Bump on tyre.
2. Improper strut action.
1. Replace tyre.
2. Replace strut.
Vehicle Shaking Vibrations
1. Wheels out of balance.
2. Loose wheel bearings.
3. Worn out tie rod ends.
4. Worn out lower ball joints.
5. Excessive wheel run out.
Disturbed front / rear end alignments.
1. Balance wheels or replace
tyre or wheel.
2. Replace wheel bearings.
3. Replace tie rod end.
4. Replace ball joint or lower link
at front.
5. Repair / replace wheel or tyre.
Check and adjust front / rear end
alignments.