- Externally check the case and cover body and contact surfaces for damages and cracks.
- Check the adjusting screw for free movement and damages to the thread.
- Check the work thread recirculating ball races for scratches, denting and other damages. Check recirculating balls guide tubes for bents on steering nut. Check the ball pin for dents or wear.
- Check the recirculating balls system friction moment using a common fastener.
If the friction moment is different from specification or if the recirculating ball system is damaged, the worm thread set must be completely replaced.
Install new bearings when the worm thread set is replaced.
- Check the steering sector for torsion, warping, cracks or damages.
- Check ball housing and its seat for wear and dent.
- Check the regulating unit.
- Check bearing and bushing wear and replace them, if required.
In case of accident, carefully inspect the worm thread and the steering sector. If necessary replace them.