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 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. If rotating torque is not to specifications, repeat procedure.
- Final rotation of adjustment screw must be clockwise. If maximum specification was exceeded, screw must be backed out, then rotated in (clockwise) to approximate new setting.
OVER-CENTER ADJUSTMENT INCH LBS. (N.m)
| Application | Max. Preload | |
|---|---|---|
| Over-Center | Total | |
| Chrysler Corp. | 8 (.9) | 14 (1.5) |
| Ford | 10 (1.1) | 16 (1.8) |
| All Others | 4-10 (.4-1.1) | 18 (2.0) |