- tyre pressure;
- wheel hub bearing clearance;
- clearance between steering tie-rod pins and levers on
stub axles;
- efficiency of shock absorbers;
- wheel rims, which must have no buckling out of tolerance.
Check the wheel geometry with the instrument 99305354.
32813
32814
32815
Figure 4
Figure 5
Figure 6
The toe-in is the result of the difference between the distances
A and B (in mm) measured on the horizontal axis of the rims,
when observing the vehicle from above.
This produces light driving and low tyre consumption.
Toe-in is positive if B is greater than A.
Toe-in will be zero if B is equal to A.
Toe-in is negative if B is less than A.
A
B
A
B
A
B
Wheel toe-in
32973
32974
Figure 7
Figure 8
Before moving on to the checks, it is necessary to make a pre-
liminary inspection of some parts of the vehicle that may affect
wheel geometry. If any trouble is found, it will have to be recti-
fied in order to avoid incorrect measurements. The checks to
make are the following:
Set the vehicle with its wheels in the position of straight-line
travel on a flat surface. Lift the rear of the vehicle and place the
boards (3) under the wheels. Lower the vehicle, brake the rear
wheels and fit on the hook (1) with the rule (2).
Lift the front of the vehicle and place oscillators (1) under the
wheels, locking them with the clamps (2).
Positioning clips and headlights
!
The checks and any work on the wheel geometry
must be done with the vehicle with a static load.
Periodically make sure the light clusters are set
correctly.
FRONT WHEEL GEOMETRY
(4X2 vehicles)
114
WHEEL GEOMETRY
S
TRALIS
AT/AD
Base - January 2003