Over-Center Preload
- 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 screw 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. If rotating torque is not to specifications, repeat procedure. Final rotation of adjustment screw must be clockwise; therefore, if maximum specification was exceeded, screw must be backed out, then rotated in (clockwise) to approximate new setting.
OVER-CENTER ADJUSTMENT (INCH LBS.)
| Application | Over-Center Preload | Preload Maximum Total |
|---|---|---|
| Chrysler Corp. | 8 | 14 |
| Ford | 10 | 16 |
| All Other Manufacturers | 4-10 | 18 |