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Over-Center Preload

  1. With worm bearing preload adjusted, turn worm shaft slowly from stop-to-stop while counting total number of turns. Turn shaft back to exact center position.
  2. Loosen lock nut and turn sector shaft adjuster screw in until all lash is taken out of sector shaft. Tighten lock nut. Rotate worm shaft slightly off center (1/2 turn). Attach an INCH-lb. torque wrench to worm shaft or steering wheel nut.
  3. Rotate worm shaft back through center position and note rotating torque. Rotating torque should be 4-10 INCH lbs. (.5-1.1 N.m) in excess of worm bearing preload. Maximum torque should not exceed 18 INCH lbs. (2 N.m). If rotating torque is not within specification, adjust sector shaft adjuster screw.
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