Front Caster Adjustment

Caster-Check and Adjust

CAUTION: If a vehicle has a suspension geometry problem, all geometry settings must be investigated and corrected before making any adjustments to the caster setting.

1. If a suspension problem is suspected, Technical Support consulted, before any adjustments are carried out.

2. NOTE: Alteration of the caster setting will affect the camber and toe settings.

Fit paintwork protection covers to fenders.
3. Raise front of vehicle and support on stands.
4. Remove front wheels.

5. CAUTION: Do not allow the weight of the vertical link to hang on the brake hose.





NOTE: Note the position of the shims before removing the fulcrum bolt.

Remove fulcrum bolt.
Remove nut.
Remove fulcrum bolt: collect washers and shims.
Secure wishbone.

6. CAUTION: The total number of shims fitted to each fulcrum bolt must always remain the same, regardless of adjustment to the front and rear packs, i.e. no shims are to be added or removed from the fulcrum bolt.

Caster angle is adjusted by interchanging the shims between the front and rear arm of each wishbone. See specifications for settings.
7. Use the illustration and table below to calculate the required positioning of the shims needed to set the caster angle.

8. NOTE: Caster specification is subject to market variations, as shown in the following table, which is the result of differing road surfaces and market preferences.





To increase positive caster, the shim thickness at the front of the wishbone 1 or 3 must be decreased, and the rear 2 or 4 increased by the same amount.





9. To decrease positive caster, the shim thickness at the front of the wishbone 1 or 3 must be increased and the rear 2 or 4 decreased by the same amount.
The thick shim is 1.6 mm thick, paint code blue, it will effect caster by 0.4 degrees.
The thin shim is 0.9 mm thick, paint code red, it will effect caster by 0.2 degrees.
The total number of shims allocated to each wishbone fulcrum bolt is 2 thick and 2 thin shims.





10. Fit fulcrum bolt.
Align wishbone to crossbeam.
Fit fulcrum bolt, and shims and washers.
Fit and tighten nut.

11. Fit road wheels.
12. Remove stands and lower vehicle.
13. Remove paintwork protection covers.
14. Check caster setting is correct.
15. Check camber and toe settings and adjust if necessary. See specifications.
16. Road test vehicle.