Motor Pulley w/(2) 8-32 Set Screws X9116
$22.99
Genuine Tacony OEM motor pulley supplied with two 8-32 set screws (part# X9116) for the Tornado Marathon SE 900 (Model 98170) and Powr-Flite Prowler PFX900S. The driving pulley, clamped to the motor shaft.
The Motor Pulley w/(2) 8-32 Set Screws (part# X9116) is a genuine Tacony OEM replacement part from the brush assembly of the Tornado Marathon SE 900 self-contained carpet extractor. It is the pulley that mounts on the brush motor shaft and drives the belt, secured by two set screws.
What the Motor Pulley w/(2) 8-32 Set Screws does
This is the driving end of the belt drive and it carries the highest stress in the system, because all the torque leaves the motor through two small set screws bearing on a shaft. That is why there are two rather than one, and why they are supplied with the pulley. If either backs off, the pulley starts to creep on the shaft, the set screw point chews a groove, and what began as a loose fastener ends as a shaft that will no longer hold any pulley.
When to replace the Motor Pulley w/(2) 8-32 Set Screws (X9116)
Replace it when the belt groove is worn, glazed or chipped, when the bore is worn or has been rounded by a pulley spinning on the shaft, or when a set screw thread is stripped. A pulley that has to be reset repeatedly, or a scored motor shaft, means both parts need examining rather than another tighten.
Motor Pulley Set X9116 — fitment and installation notes
Seat the set screws on the shaft flat and not on a round surface, tighten both evenly, and use thread locking compound where the design calls for it. Align the motor pulley with the driven pulley before running, since a misaligned drive throws belts and wears both grooves quickly. 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 Motor Pulley w/(2) 8-32 Set Screws
- 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 Motor Pulley w/(2) 8-32 Set Screws do on the Tornado Marathon SE 900?
This is the driving end of the belt drive and it carries the highest stress in the system, because all the torque leaves the motor through two small set screws bearing on a shaft. That is why there are two rather than one, and why they are supplied with the pulley. If either backs off, the pulley starts to creep on the shaft, the set screw point chews a groove, and what began as a loose fastener ends as a shaft that will no longer hold any pulley.
How do I know if my Motor Pulley w/(2) 8-32 Set Screws needs replacing?
Replace it when the belt groove is worn, glazed or chipped, when the bore is worn or has been rounded by a pulley spinning on the shaft, or when a set screw thread is stripped. A pulley that has to be reset repeatedly, or a scored motor shaft, means both parts need examining rather than another tighten.
What models is the Motor Pulley w/(2) 8-32 Set Screws (part# X9116) 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 Motor Pulley w/(2) 8-32 Set Screws (part# X9116) or get help?
You can add the Motor Pulley w/(2) 8-32 Set Screws (part# X9116) 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.
