To re-adjust the preload is convenient to change also all the balls. Use the following procedure:

1. - Unscrew the nuts out of the screw.
2. - Clean completely, place new balls and assemble the nuts on the screw following the procedure indicated for both process.
3. - Place gauges in three points between the nuts with the keyways aligned.
4. – Measure the turning torque of the nuts and change the gauges until obtaining the desired torque.
5. – Manufacture the spacers with the thickness of the gauges, with which this torque has been measured to.
6. – Unscrew one of the nuts, place the spacer and reassemble the nut.