Over-Center Preload Adjustment
- With worm bearing preload adjusted, turn worm shaft slowly from stop-to-stop while counting total number of turns. Then, turn shaft half-way back to exact center position.
- Loosen lock nut and turn over-center adjustment screws in until all lash is taken out of shaft. Tighten lock nut. Rotate worm shaft slightly off center (45-90°), then attach an INCH lbs. torque wrench to worm shaft.
- Using torque wrench as a lever, rotate worm shaft back through center position and record rotating torque. Over-center rotating torque should be 16 INCH Lbs. (1.8 N.m). If rotating torque is not to specifications, repeat procedure.