Ref.: MEL-WA(3D HCV) - OM Ver.1.7
127
9.2.
ALIGNMENT HCV
Sl.
No.
Trouble
Causes
Remedies
1
Vehicle
pulling
towards one
side
Misaligned Rear axle (ie.,
unequal Rear Toe).
Rear axle is not perpendicular
to Geometric Centre Line
Check the Rear suspension
Setback
Check the position of Front wheels are in line
Uneven tyre pressure.
Car pulls sideway with low
inflation
Check both tyres are with same pressure
Mismatched tyre sizes.
Steering pull due to mixing of
Radial & Normal tyres and
cross ply
Both Front tyres must be of same size, same
design & should have approx. same amount
of thread wear
Dragging brakes and car pulls
sideway
Check for corroded brake caliper piston and
misadjusted emergency brake cable
Power steering problem
Check for uneven Steering balance of Front
wheels in jacked up condition and run the
engine. The steering should not turn one
side due to leak in Control valve. Steering
effort should also be equal in both directions
Ensure the wheel bracket is fixed on the rim
at 12 o clock position (While the wheel
bracket center block is slide down).
Wheel bracket may be
defective
1.
If Screw rod is found to be bent, replace
the Wheel bracket
2.
Fix all the Wheel brackets one by one in
another Wheel rim and ensure the
bracket motion is proper. If not, replace
the particular Wheel bracket
3.
Fix all the Wheel brackets in a particular
wheel one by one and ensure the
readings are similar
Uneven pit level
1.
Pit must be leveled properly within the
tolerance of ±2mm
2.
Zero level should be ensured diagonally
(ie., between Front Left & Rear Right
and Front Right & Rear Left) without
deviation
2
Other
symptoms
Tyre wear on outside shoulder
due to excessive positive
Camber
Inflate the tyre to recommended pressure
and adjust the Camber as per the
specifications
Tyre wear on inside shoulder
due to excessive negative
Camber
Inflate the tyre to recommended pressure
and adjust the Camber as per the
specifications
Tyre wear on both shoulders
due to under inflated tyres
Check the tyre pressure is as per
recommended specifications
Saw tooth tyre wear due to too
much of Toe-in or Toe-out
Adjust the Toe as per specifications
Abnormal tyre wear due to
loose Steering system,
misaligned Front or Rear
wheels, defective suspension
system or car is overloaded
Correct the Steering system, align Front &
Rear wheels and correct the suspension
system. If necessary replace the parts
Hard steering due to low or
uneven Tyre pressure, more
positive Caster or tight
Steering system or defective
Power steering
Check & inflate the tyre as per recommended
pressure and adjust the Steering system or
replace the Power steering
