CleanMax ZM-500 ZM-700 Bag Collar Spring B434-3400

The Bag Collar Spring (part# B434-3400) is the spring that keeps the bag collar seated and sealed on the CleanMax ZM-500/ZM-700 and Maytag M500 commercial uprights. It provides the constant tension that holds the disposable bag’s collar locked onto the machine’s inlet so no dirty air bypasses the bag.

Compatible Models for the Bag Collar Spring B434-3400

This bag collar spring is a genuine Tacony OEM part used on these commercial uprights (the Riccar and Simplicity siblings use a different bag assembly):

• Tornado: TV280-W12-U (CK ULW 13/1)
• CleanMax: ZM-500, ZM-700 (corded commercial uprights)
• Maytag: M500

This is a genuine Tacony OEM part for the CleanMax ZM-500/ZM-700 and Maytag M500 commercial uprights. If you are unsure which model or configuration you have, call 763-535-0770 and we will confirm the correct part before you order.

What the Bag Collar Spring does

The bag collar spring loads the bag collar against its mount so the paper or cloth bag stays sealed to the dust inlet while the vacuum runs. That seal is what forces all incoming air through the bag media rather than leaking around the collar — the difference between real filtration and dust blowing back into the room. Every bag change works the spring, so over time it can weaken or deform, which is why it is a genuine replaceable part rather than part of a larger casting.

Signs the Bag Collar Spring needs replacing

Replace the spring if the bag collar no longer clicks in and stays firmly seated, if the bag pops loose during use, or if you see loss of suction or dust escaping at the collar that returns only when you hold the bag seated by hand.

Installation and fit

Power down and unplug the vacuum, then remove the bag. Release the old spring from its seat, fit the new spring in the same position, and confirm the bag collar clicks in and holds firmly sealed against the inlet. Twin City Vacuum has sold and serviced CleanMax equipment since 1956, and every part is sourced directly from Tacony. Browse more CleanMax parts, or learn more at CleanMax.

Frequently Asked Questions

What does the Bag Collar Spring do on the CleanMax ZM-500 and ZM-700?

It holds the bag collar seated and sealed against the dust inlet so all incoming air is forced through the bag, preventing dirty air from bypassing the filtration.

How do I know if my Bag Collar Spring needs replacing?

Replace it if the bag collar no longer stays firmly seated, the bag pops loose, or suction and dust leakage at the collar improve only when you hold it seated by hand.

What models is the Bag Collar Spring (part# B434-3400) compatible with?

It fits the CleanMax ZM-500 and ZM-700 and the Maytag M500 (TV280-W12-U) commercial uprights. Call 763-535-0770 to confirm fit on a related model.

How do I order the Bag Collar Spring (part# B434-3400) or get help?

You can add the Bag Collar Spring (part# B434-3400) 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 CleanMax equipment since 1956 and can help confirm the right part for your machine.