Note: adjustment is carried out with the steering gear removed.
1. Loosen locknut (1) adjustment screw (2) bipod shaft.
2. Fully turn out the bipod shaft adjusting screw (counterclockwise rotation).
3. Turn the adjusting screw one full turn (clockwise rotation).
4. Rotate the input shaft in either direction until it stops. Rotate the shaft in the opposite direction until it stops and count the number of revolutions.
5. Starting from the second stop, rotate the shaft in the opposite direction by half the number of turns. This will be the center position of the mechanism.
6. Check the center position of the mechanism in the following positions:
- flat on the input shaft (2) must be directed upward (parallel to side cover);
- master slot (3) bipod shaft must be on the axis of the adjusting screw (1) bipod shaft.
7. Install a torque wrench on the input shaft so that its handle is vertical.
8. Rotate the input shaft 45 degrees to either side of the center position. The shaft should rotate smoothly and without jamming.
9. Record the amount of worm bearing interference in the center position of the mechanism (shaft breaking moment).
10. Breakaway torque should be 0.7-1.7 Nm (with installed worm and ball nut). If the breakaway torque is out of range, adjust it.
11. To obtain the desired breakaway torque, adjust the bipod shaft center preload by turning the bipod shaft adjusting screw clockwise.
12. Increase the load by 0.7-1.1 Nm above the worm bearing preload. Tighten the adjusting screw locknut. Tightening torque 49 Nm.
13. Install the steering gear to the vehicle and bleed the power steering system.