Lock Nut PX46
$4.99
Genuine Tacony OEM lock nut (part# PX46) used on the Tornado Marathon SE 900 (Model 98170) and Powr-Flite Prowler PFX900S tank assembly. A locking fastener meant to be replaced rather than reused once its grip is gone.
The Lock Nut (part# PX46) is a genuine Tacony OEM replacement part from the recovery and solution tank assembly of the Tornado Marathon SE 900 self-contained carpet extractor. It is the locking nut that holds a threaded tank-assembly fastener against working loose under vibration.
What the Lock Nut does
An extractor vibrates continuously in service, and a plain nut on a plain thread will walk loose over enough hours. This lock nut resists that by design, so a bracket, fitting or shaft stays where it was set instead of gradually backing off until something rattles or leaks.
When to replace the Lock Nut (PX46)
Replace it whenever it comes off, and any time it can be spun down the thread by hand. A locking nut that threads on easily has already given up the interference that makes it a locking nut, and refitting it is how a joint that was tightened correctly comes loose anyway.
Lock Nut PX46 — fitment and installation notes
Tighten to a firm seat rather than leaning on it; overtightening a locking nut into plastic or a thin bracket distorts the part it is holding. Where the nut backs a bulkhead or sealing fitting, snug it evenly and check the seal afterwards rather than chasing a drip with more torque. 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 Lock Nut
- 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 Lock Nut do on the Tornado Marathon SE 900?
An extractor vibrates continuously in service, and a plain nut on a plain thread will walk loose over enough hours. This lock nut resists that by design, so a bracket, fitting or shaft stays where it was set instead of gradually backing off until something rattles or leaks.
How do I know if my Lock Nut needs replacing?
Replace it whenever it comes off, and any time it can be spun down the thread by hand. A locking nut that threads on easily has already given up the interference that makes it a locking nut, and refitting it is how a joint that was tightened correctly comes loose anyway.
What models is the Lock Nut (part# PX46) 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 Lock Nut (part# PX46) or get help?
You can add the Lock Nut (part# PX46) 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.
