Internal Tooth Lock Washer 7CY002
$2.99
Genuine Tacony OEM internal tooth lock washer (part# 7CY002) for the Tornado Marathon SE 900 (Model 98170) and Powr-Flite Prowler PFX900S chassis. Teeth on the inside, so the bite is hidden under the fastener head.
The Internal Tooth Lock Washer (part# 7CY002) is a genuine Tacony OEM replacement part from the chassis assembly of the Tornado Marathon SE 900 self-contained carpet extractor. It is the toothed lock washer whose teeth bite inward under a fastener to resist loosening. It is a genuine Tacony OEM part shared across CleanMax, Powr-Flite and Tornado machines — see the full compatibility list below. It also fits the Tornado 98168 20″ Marathon 1200 carpet extractor (12 Gallon 115V), Series P.
What the Internal Tooth Lock Washer does
An internal tooth washer works differently from a split ring. Instead of one spring gap it has many small teeth that skew slightly and dig into the fastener face and the part beneath, so the resistance to turning is spread all the way round. Because the teeth face inward, the outer edge stays smooth and the marks it leaves stay hidden under the head, which is why this type turns up on visible or finished surfaces.
When to replace the Internal Tooth Lock Washer (7CY002)
Replace it when the teeth are flattened, when it has been dished or cracked, or when corrosion has taken the edges off. A washer that leaves no witness marks on reassembly has already lost the bite it was doing the work with.
Internal Tooth Lock 7CY002 — fitment and installation notes
Use a new one each time the joint is opened, since the teeth deform on first use. Where the washer also carries a ground connection, make sure both contact surfaces are clean and unpainted, and never substitute a plain washer for a toothed one in that role. Tacony builds the Tornado, CleanMax and Powr-Flite versions of this 30-inch wide-area machine on the same platform and they share the great majority of their parts, so this component carries across all three brands rather than belonging to any one of them. 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 Internal Tooth Lock Washer
- Tornado 93030 30″ Clean-Air Carpetkeeper (Wide Area) — Series H and J
- Tornado 93031 30″ Clean-Air Carpetkeeper (Wide Area) 230V — Series J
- CleanMax CM-WAV Wide Area Vacuum
- Powr-Flite PF2030 30-Inch Wide Area Commercial Vacuum
- Tornado Marathon SE 900 (Model 98170)
- Powr-Flite Prowler PFX900S
- Powr-Flite Prowler PFX900SG
- Tornado 98168 20″ Marathon 1200 Carpet Extractor (12 Gallon 115V) — Series P
These machines are built on the same wide-area platform under different brands and share the great majority of their parts.
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 Internal Tooth Lock Washer do on the Tornado Marathon SE 900?
An internal tooth washer works differently from a split ring. Instead of one spring gap it has many small teeth that skew slightly and dig into the fastener face and the part beneath, so the resistance to turning is spread all the way round. Because the teeth face inward, the outer edge stays smooth and the marks it leaves stay hidden under the head, which is why this type turns up on visible or finished surfaces.
How do I know if my Internal Tooth Lock Washer needs replacing?
Replace it when the teeth are flattened, when it has been dished or cracked, or when corrosion has taken the edges off. A washer that leaves no witness marks on reassembly has already lost the bite it was doing the work with.
What models is the Internal Tooth Lock Washer (part# 7CY002) compatible with?
The Internal Tooth Lock Washer (part# 7CY002) fits: Tornado 93030 30″ Clean-Air Carpetkeeper (Wide Area) — Series H and J; Tornado 93031 30″ Clean-Air Carpetkeeper (Wide Area) 230V — Series J; CleanMax CM-WAV Wide Area Vacuum; Powr-Flite PF2030 30-Inch Wide Area Commercial Vacuum; Tornado Marathon SE 900 (Model 98170); Powr-Flite Prowler PFX900S; and Powr-Flite Prowler PFX900SG. If your machine is not on this list, call 763-535-0770 and we will confirm it against your serial number before you order.
How do I order the Internal Tooth Lock Washer (part# 7CY002) or get help?
You can add the Internal Tooth Lock Washer (part# 7CY002) 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.
