Pulley X9117

The Pulley (part# X9117) is a genuine Tacony OEM replacement part from the brush assembly of the Tornado Marathon SE 900 self-contained carpet extractor. It is the driven pulley that transmits belt drive to the brush assembly.

What the Pulley does

A belt does not grip a pulley by friction on the outside; it wedges into the groove and grips on the flanks. That means the shape of the groove is doing all the work, and once it wears, glazes or picks up packed fibre, the belt rides deeper, contacts the base of the groove, and starts to slip. Slip generates heat, heat kills belts, and the new belt fitted to the worn pulley fails just as fast.

When to replace the Pulley (X9117)

Replace it when the groove is worn, polished glassy, or has chipped flanks, when the pulley wobbles on its shaft, or when the bore or keyway is worn. A belt that keeps failing, squealing on start-up, or leaving black dust is pointing at the pulley rather than the belt.

Pulley X9117 — fitment and installation notes

Replace the belt whenever the pulley is replaced, and check the mating pulley at the same time, since a new pulley against a worn one wears out quickly. Clean packed fibre out of the groove at every service, and check that the two pulleys line up before running the machine. Tacony builds the Tornado Marathon SE 900 and the Powr-Flite Prowler PFX900S on a single machine platform, so this component carries across both brands rather than belonging to either one. It is a shared Tacony component and may fit additional models beyond those listed — call us and we will confirm against your serial number.

Compatible Models for the Pulley

• Tornado Marathon SE 900 — Model 98170
• Powr-Flite Prowler PFX900S
• Powr-Flite PFX900SG

Twin City Vacuum has been selling and servicing commercial floor-care equipment since 1956 from 5415 West Broadway, Crystal, MN 55428. We stock genuine Tacony parts and ship nationwide. Browse the full Tornado 98170 parts catalogue, or see the manufacturer at tornadovac.com.

Frequently Asked Questions

What does the Pulley do on the Tornado Marathon SE 900?

A belt does not grip a pulley by friction on the outside; it wedges into the groove and grips on the flanks. That means the shape of the groove is doing all the work, and once it wears, glazes or picks up packed fibre, the belt rides deeper, contacts the base of the groove, and starts to slip. Slip generates heat, heat kills belts, and the new belt fitted to the worn pulley fails just as fast.

How do I know if my Pulley needs replacing?

Replace it when the groove is worn, polished glassy, or has chipped flanks, when the pulley wobbles on its shaft, or when the bore or keyway is worn. A belt that keeps failing, squealing on start-up, or leaving black dust is pointing at the pulley rather than the belt.

What models is the Pulley (part# X9117) compatible with?

The Tornado Marathon SE 900 (Model 98170), the Powr-Flite Prowler PFX900S and the PFX900SG. It is a shared Tacony part and may fit further models; call us to confirm.

How do I order the Pulley (part# X9117) or get help?

You can add the Pulley (part# X9117) 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.