Tornado Lock Washer K73433000

This is the genuine Tacony lock washer (part# K73433000) used in the rear assembly of the Tornado Strike TV190-W10-U. Two are fitted. The same washer appears on the BR 16/3 automatic floor scrubber, which is why the title carries no model name.

Compatible Models for the Lock Washer

• Tornado Strike TV190-W10-U cordless upright vacuum
• Tornado BR 16/3 automatic floor scrubber (99406)

This part is used beyond the cordless uprights. Tacony’s parts records list part# K73433000 against the Strike TV190-W10-U and the BR 16/3 automatic floor scrubber (99406), two very different machines that happen to use the same piece of hardware, so the title carries no model name. Two are fitted to the Strike.

What the Lock Washer does

A lock washer keeps its fastener tight against vibration. On a machine with two motors running all day, that is not a theoretical concern — fasteners that are not locked work loose over months, and a loose fastener in the rear assembly is how a rattle becomes a cracked mounting boss. The washer does its job by spring tension, which is also why it is a one-use part.

Signs the Lock Washer needs replacing

You replace these on reassembly rather than on inspection. Any washer that comes out flattened, distorted or visibly without spring has already given up what it had. The other prompt is a fastener found loose during service: if one has worked its way out, fit a new washer with it rather than simply tightening the old arrangement back up.

Fitting the Lock Washer

Fit a new washer under each fastener as it goes back, and tighten to the same snug feel as the rest of the rear assembly. Do not over-torque — these run into plastic, and a stripped boss is a far more expensive problem than a loose screw. Check that the washer sits flat rather than perched on an edge before tightening.

Twin City Vacuum has been selling and servicing Tornado equipment since 1956. You can browse the rest of the machine on our Tornado Strike parts pages, and the manufacturer publishes specifications at tornadovac.com.

Frequently Asked Questions

How many does the Strike use?

Two, in the rear assembly. The factory parts sheet lists part# K73433000 with a quantity of two.

Can I re-use a lock washer?

We would not. It works by spring tension and it has been compressed once already. At this price, fitting new ones when the machine is open is the obvious call.

Is this the same washer as the one holding the motor foams?

No. That is part# K63431450, a different washer in a different place. The Strike uses several small washers with distinct part numbers, so check the diagram or call us with your serial number.

How do I order the Lock Washer (part# K73433000) or get help?

You can add the Lock Washer (part# K73433000) 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.