Tornado Tempest Brush Motor K66135760

The Tornado Tempest brush motor (part# K66135760) is the 36V motor that drives the brushroll on the TV400-W26-U cordless wide-area sweeper. Tacony lists it as Brush Motor, Tempest. It drives through the V-ribbed belt (part# K63480580) and pulley (part# K56250390) rather than directly, and it is the largest single current draw on the machine.

That current draw is worth understanding before condemning the motor. Brush pressure set too heavy, a brushroll tangled with fibre, a dragging bearing or a belt running too tight all raise the load, and the motor control board (part# K46833210) responds by shutting the circuit down to protect it. The machine then behaves exactly as though the motor has failed. On a cordless machine the same conditions also cut runtime noticeably, so an operator reporting both a short battery and an intermittent brush is usually describing one mechanical fault.

Compatible Models for the Brush Motor

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

Symptoms that point to the brush motor

• The brushroll will not turn while the vacuum and side broom run normally.
• The motor runs hot or smells of burnt insulation.
• It cuts out under load and recovers after cooling.
• Noticeably reduced brush speed with a fully charged pack.
• Grinding or squealing traced to the motor rather than the bearings.

Before ordering, turn the brushroll by hand with the pack removed. It should spin freely. If it drags, the fault is mechanical — bearings, wound fibre or brush pressure — and a new motor will fail the same way.

Fitting notes

Remove the battery pack before starting. The motor mounts on the brushroll assembly with M5 x 20 screws (part# K73031080) and drives through the belt. Note the lead routing before disconnecting. Set belt tension as the original was — over-tight loads both the motor and the bearings, and is one of the more common causes of a repeat failure. Check the brushroll turns freely before refitting the pack.

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 brush motor do on the Tornado Tempest?

It drives the brushroll through a V-ribbed belt and pulley. It is the machine’s largest single current draw, so its condition affects battery runtime as well as cleaning.

How do I know if my brush motor needs replacing?

If the brushroll will not turn while the other functions run normally, the motor runs hot, or it cuts out under load. First turn the brushroll by hand with the pack out — if it drags, the fault is mechanical and a new motor will fail the same way.

What models is the brush motor (part# K66135760) compatible with?

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

My Tempest has a short battery and an intermittent brush — two faults?

Usually one. Heavy brush pressure, a tangled brushroll, a dragging bearing or an over-tight belt all raise the motor load, which both shortens runtime and triggers the control board’s overload protection. Fix the mechanical cause and both symptoms go.

How do I order the brush motor (part# K66135760) or get help?

You can add the brush motor (part# K66135760) 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.