Tornado Helical Spring K53320820

The helical spring (part# K53320820) is the genuine Tacony coil spring in the brush-head assembly of the CVD dual-motor uprights. It holds tension in the height mechanism so the head returns and holds position instead of drifting down under its own weight as the machine is pushed.

This is a genuine Tacony OEM part. It appears on the brush head sheet for both widths.

Compatible Models for the Helical Spring K53320820

• Tornado CVD 38/2 (91440) — 15-inch dual motor HEPA
• Tornado CVD 48/2 (91442) — 19-inch dual motor HEPA

The same spring serves the 15-inch CVD 38/2 and the 19-inch CVD 48/2.

What the helical spring does

The spring provides the return force the height mechanism works against. With it in good order the head takes up a setting and stays there; with it stretched, broken or missing, the mechanism has nothing to hold against and the head settles where the carpet pushes it.

Signs it needs replacing

A brush head that sinks during a pass, a height setting that feels slack rather than positive, or a visibly stretched or broken coil once the head is opened. A spring that has lost tension will often still look intact, so compare its free length against the new one.

Installation and fit

Bench job with the head opened. Note how the old spring is hooked before removing it — photographing it first saves a lot of time — and check the adjusting wheel and pinion while you are in there, since all three work together.

Frequently Asked Questions

Does one spring fit both machine widths?

Yes. Tacony lists K53320820 against the CVD 38/2 and CVD 48/2 alike.

How can I tell if the spring has lost tension?

Compare its relaxed length with a new one. A spring can look undamaged and still have stretched enough to stop holding the head.

Should I replace anything else at the same time?

Look at the adjusting wheel (K45153160) and the pinion (K50334590). The three share the same mechanism and a failure in one often loads the others.

Is it sold singly?

Yes, one spring.