Tornado Tempest Brushroll Star Driver K54740040

The Tornado Tempest brushroll star driver (part# K54740040) is the splined carrier that couples the roller brush (part# K47626420) to its drive on the TV400-W26-U cordless sweeper. Tacony lists it as Star Driver, Brushroll; the parts book calls it the carrier.

The star form is what lets a brush be a consumable. The driver’s lobes engage matching recesses in the brush end, so drive is transmitted by shape rather than by clamping — which means a brush can be pulled off and replaced in seconds without tools. The trade-off is that every brush change works those lobes, and the driver is steadily worn by the very operation it exists to make easy.

Compatible Models for the Brushroll Star Driver

• Tornado Tempest Wide-Area Cordless Carpet Vacuum Sweeper — Model TV400-W26-U

Symptoms that point to the star driver

• The brush turns on the driver instead of with it, especially under load.
• The lobes are visibly rounded, chipped or worn short.
• A new brush is loose on the driver from the first fitting.
• Knocking or clicking from the brush end under load.
• Brush ends are being chewed out unusually quickly.

That last point matters. A worn driver destroys the drive recesses in new brushes, so a driver left too long turns a hundred-dollar part into a recurring two-hundred-dollar one.

Fitting notes

Remove the battery pack before starting. The driver sits at the brush end of the assembly, between the brush and the bearing flange (part# K52530260). Inspect the drive recesses in the brush while both are apart — if the brush recesses are already rounded, fitting a new driver alone will not restore a solid drive. Check the brush seats fully and has no rotational play before returning the machine to service.

Twin City Vacuum has been selling and servicing Tornado equipment since 1956. Browse the full Tornado Tempest parts range, or see the Tornado Tempest TV400-W26-U machine. Manufacturer information is at tornadovac.com.

Frequently Asked Questions

What does the star driver do on the Tornado Tempest?

Its lobes engage matching recesses in the end of the roller brush, transmitting drive by shape rather than by clamping so the brush can be changed in seconds without tools.

How do I know if my star driver needs replacing?

If the brush turns on the driver rather than with it under load, if the lobes are rounded or chipped, if a new brush is loose from first fitting, or if there is knocking from the brush end.

What models is the star driver (part# K54740040) compatible with?

The Tornado Tempest TV400-W26-U wide-area cordless carpet sweeper. PartSmart lists it against the Tempest alone.

Why do my brushes keep chewing out at the end?

A worn star driver. Once its lobes round off it destroys the drive recesses in each new brush, so the brush becomes a recurring cost. Replace the driver and the brushes last normally again.

How do I order the star driver (part# K54740040) or get help?

You can add the star driver (part# K54740040) directly to your cart on this page, or call us at 763-535-0770. Our staff at 5415 West Broadway, Crystal, MN 55428 has been servicing Tornado equipment since 1956 and can help confirm the right part for your machine.

Questions? Call us at 763-535-0770 or visit us at 5415 West Broadway, Crystal, MN 55428.