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FRONT AXLE ALIGNMENT
CHECKING - ADJUSTING
Preliminary Checks
Examine the following
and correct if necessary
before
checking
and adjusting
the front
axle
alignment:
- Uniformity
of front tires
(size, inflation pressure and wear)
- Pivot points
- Condition of rubber bushings
Play: in ball joints and in bearings
- Wheel end play:
not to exceed 1 mm
(compensate for this with measuring instruments)
- Underbody
height
symmetry
(condition
of
suspension)
Sequence of Operations
The design of the front axle geometry is such that
should one of the angles be altered (caster, camber,
KPI, toe and variation) there will be a greater or
lesser change in the values of the other angles. (The
caster angle exerts the greatest influence).
So it is absolutely necessary to follow this sequence:
1. Attach the measuring instrument to the vehicle
according to the manufacturer's instructions.
2. Jack up the vehicle under the body.
3. Neutralize any wheel end play.
4. Lower the vehicle onto the turntables.
S. Attach the brake pedal press.
6. Settle the suspension so that it adopts its normal
position.
7. Align the front wheels in relation to the rear
wheels or in relation to the body on each side by
turning the steering wheel so as to obtain values
A and G which are identical on the R.H. and L.H.
sides.
8. Set the turntables to zero in this position.
Check the following in the order shown and adjust:
1. Castor
2. K.P.1.
3. Camber
4. Steering box height setting
5. Toe and its distribution
J2-1
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Troubleshooting
