Tornado Lock Washer 19530

The Tornado Lock Washer 19530 is the genuine OEM lock washer used on the main assembly of the PS Series professional spotters. The machine uses four, and their job is to stop the fasteners they sit under working loose under the constant vibration of the vacuum motor and the solution pump. It also fits the Tornado PS8226 Spotter 98226, the 230-volt build of the deluxe PS Series spotter.

Compatible Models for the Lock Washer

• Tornado PS Spotter 98220 — PS Series professional spotter, 115V
• Tornado PS8221 Spotter 98221 — the 230-volt build of the same spotter
• Tornado PS8225 Spotter 98225 — deluxe PS Series spotter
• Tornado PS8226 Spotter 98226 — the 230-volt build of the deluxe PS Series spotter, Series D & E

Tornado’s factory cross-reference returns this washer across Series C through G of the 98220, Series F and G of the 98221, and the 98225 — the spotter family and nothing outside it. We publish only the models we can confirm against Tornado’s current catalog; call us at 763-535-0770 with your model and serial number if yours is not listed.

Order it by number, not by appearance

This machine uses more than one kind of lock washer, and they are not interchangeable. The main assembly alone carries 19530 at one position and 30019 — an external-tooth washer in 18-8 stainless — at another, plus 01713 elsewhere on the machine. They look broadly similar in a parts tray and they do not do the same job in the same place.

So the part number is what identifies this washer, not what it looks like. If you are matching one by eye out of a mixed tray, you have a reasonable chance of fitting the wrong one, and the failure that follows is slow and quiet: a fastener that holds for a few weeks and then starts to back off.

What a lock washer actually does

A plain washer spreads load. A lock washer resists rotation. Those are different jobs, and substituting one for the other removes the anti-vibration function entirely while looking completely normal — which is why this is one of the easiest parts on a machine to get wrong without noticing.

Vibration is the whole point on a spotter. A vacuum motor and a solution pump run inside a compact housing, so everything bolted to that housing is shaken continuously for its whole working life. A fastener that loosens here rarely fails dramatically. It slowly lets a joint open, and then a gasket starts to leak, a bracket rattles, a panel chatters, or an electrical terminal works loose — and the cause is a few pence worth of washer that was left out or replaced with a plain one.

That is also the argument for fitting new ones rather than reusing. A lock washer works by being sprung or toothed, and the first full tightening flattens it against the mating faces. A washer that has been torqued down once has already given up most of its resistance.

When to replace it

Treat them as consumables and fit new ones whenever a joint is opened. They cost almost nothing and they are on the parts list for a reason.

Replace one on sight if it has been flattened, if any teeth are worn smooth, broken or bent over, if it is cracked or distorted from over-tightening, or if it is corroded. If you find a fastener that has worked loose in service, the washer under it has stopped doing its job even if it looks acceptable — replace it rather than simply re-tightening.

Replace the set rather than the single one you noticed. They are all the same age and have all seen the same vibration.

Fitting notes

Fit the washer directly under the fastener head or nut — the face it has to act against. Do not stack it with a plain washer between it and the surface, because then it has nothing to bite or bear on and the joint relies on friction alone.

Clean both bearing faces first so it engages metal rather than old sealant, paint flakes or dried detergent. Tighten to a firm, even clamp: a lock washer needs enough load to work, but over-tightening flattens it and destroys the very property you are relying on. Where several fasteners hold one part, bring them up progressively in a crossing pattern so the part seats square and any gasket under it compresses evenly. And check the thread it goes into — if a fastener will not hold torque and the fastener and washer are both sound, the thread in the mating part has gone, which is a different repair.

Twin City Vacuum has been selling and servicing Tornado equipment since 1956 and keeps PS Series spotter hardware on the shelf in Crystal, Minnesota.

You can browse every assembly for this machine on our Tornado PS Spotter 98220 parts page, and the manufacturer’s specifications are published at tornadovac.com.

Frequently Asked Questions

How is the Lock Washer 19530 different from the other lock washers on this machine?

By part number, which is what identifies it. The main assembly also uses 30019, an external-tooth washer in 18-8 stainless, and 01713 appears elsewhere on the machine. They look broadly similar in a parts tray and are not interchangeable — match the number, not the appearance.

Can I use a plain washer instead of the Lock Washer?

No. A plain washer spreads load; a lock washer resists rotation. Substituting one silently removes the anti-vibration function while looking entirely normal, and on a machine whose motor and pump shake everything bolted to it, that shows up weeks later as a leaking gasket, a rattle or a loose terminal.

Can the Lock Washer be reused?

Not sensibly. It works by being sprung or toothed, and the first full tightening flattens it against the mating faces, so a reused one has already given up most of its resistance. Fit new ones whenever the joint is opened — and replace the whole set rather than the single one you noticed.

How do I order the Lock Washer (part# 19530) or get help?

Call us at 763-535-0770 to order the Lock Washer (part# 19530) — this is a factory-order part and we will confirm current pricing and the right washer for your position when you call. Our staff at 5415 West Broadway, Crystal, MN 55428 has been servicing Tornado equipment since 1956.

Questions? Call us at 763-535-0770 or visit us at 5415 West Broadway, Crystal, MN 55428.