Tornado Tempest Adjustment Knob Nut K73114210

The Tornado Tempest adjustment knob nut (part# K73114210) is the hex nut that retains the brush height adjustment train on the TV400-W26-U cordless sweeper. Tacony lists it as nut 5-04, Adjustment Knob — the Tempest uses nine different nuts and this is the one specified for the adjustment assembly. It also appears on the filter and blower assembly.

It is worth saying plainly what this nut does and does not do. It retains the adjustment train; it does not clamp it. There is a correct degree of tightness at which the twisting bolt still turns freely but nothing can work its way loose, and finding that point is the whole skill of reassembling this part of the machine. Tightened past it, the adjustment locks up; left short of it, the nut walks off under vibration and the brush height goes wherever it likes.

Compatible Models for the Adjustment Knob Nut

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

When to replace it

• The thread is stripped, crossed or galled from a previous repair.
• The nut no longer holds its setting and works loose in service.
• The flats are rounded so it cannot be torqued properly.
• Corrosion has seized it to the bolt.
• The adjustment train has been dismantled — it is inexpensive and worth renewing.

Fitting notes

Remove the battery pack first. The nut retains the twisting bolt (part# K51053320) with the spring (part# K53322070) and lever (part# K51297940). Tighten until the assembly has no free play but the bolt still turns by hand through its full range, then check the brush height adjustment works end to end before closing the machine up. If the adjustment has gone stiff, back the nut off slightly rather than forcing it.

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 adjustment knob nut do on the Tornado Tempest?

It retains the brush height adjustment train on its bolt. It holds the assembly together without clamping it, so the twisting bolt can still turn to raise and lower the brushroll.

How do I know if my adjustment knob nut needs replacing?

If the thread is stripped or crossed, the flats are rounded, it has corroded onto the bolt, or it keeps working loose in service. Renew it as a matter of course whenever the adjustment train has been apart.

What models is the adjustment knob nut (part# K73114210) compatible with?

The Tornado Tempest TV400-W26-U wide-area cordless carpet sweeper. It is used on both the battery housing and the filter and blower assemblies of that machine.

How tight should it be?

Tight enough that there is no free play in the adjustment train, loose enough that the twisting bolt still turns freely by hand through its whole range. If the adjustment feels stiff after tightening, you have gone too far — back it off slightly.

How do I order the adjustment knob nut (part# K73114210) or get help?

You can add the adjustment knob nut (part# K73114210) 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.