QD Terminal F 1/4″ x 22/18 AWG 19503

Genuine OEM fully insulated female quick-disconnect crimp terminal (part# 19503), sized for 22–18 AWG wire on a 1/4-inch male tab — fits Tornado and Powr-Flite commercial cleaning machines, including the PS Series professional spotters and the 30″ wide-area vacuums. It also fits the Tornado PS8226 Spotter 98226, the 230-volt build of the deluxe PS Series spotter.

Compatible Models for the QD Terminal 19503

• Tornado PS Spotter 98220 — PS Series Professional Spotter (2 gal, 115V), Series C through G
• Tornado PS8221 Spotter 98221 — the 230-volt deluxe spotter, Series G
• Tornado PS8225 Spotter 98225 — the deluxe PS Series spotter, Series C and Series D & E
• Tornado 93030 30″ Clean-Air Carpetkeeper (Wide Area) — Series J
• Powr-Flite PF2030 — 30-inch wide-area commercial vacuum
• Tornado PS8226 Spotter 98226 — the 230-volt build of the deluxe PS Series spotter, Series D & E

The 230-volt PS8221 Spotter 98221 uses the same quick-disconnect terminal on its wiring diagram, in the Series G book.

The deluxe PS8225 Spotter 98225 uses the same quick-disconnect terminal on its wiring diagram, in both the Series C and the Series D & E book.

Tornado’s factory cross-reference lists this terminal on thirteen machines, which is more than the cross-reference will display at one time, so the list above is the confirmed set rather than the complete one. Call us at 763-535-0770 with your model and serial number and we will confirm it against the current catalog before you order.

What the terminal is, and what the numbers mean

A quick-disconnect terminal is the fitting that lets a lead be unplugged from a switch, motor or pump by hand instead of being unscrewed. This is the female half — the receptacle that slides onto a flat male tab.

Both figures in the name are the specification, and both have to match:

1/4 inch is the width of the tab it mates with. Quarter-inch is the common size on commercial cleaning equipment, but 0.187 in. tabs are used too, and a terminal made for the wrong tab either will not go on or goes on loose — and a loose quick-disconnect is a joint that arcs.

22/18 AWG is the wire range the barrel is sized to crimp. Crimp a conductor thinner than the range and the barrel never grips the strands; crimp a thicker one and the barrel cannot close properly around it. Either way the joint has resistance where it should have none, and a joint with resistance generates heat.

“Fully insulated” means the sleeve covers the barrel and continues past the receptacle, so the terminal cannot touch anything it should not once it is packed in with the rest of the wiring. That matters more on a wet machine than on a dry one.

Symptoms that the terminal needs replacing

Quick-disconnect terminals fail mechanically far more often than electrically. The usual cause is being pulled on and off repeatedly during service work: the receptacle’s spring opens up a little each time, and eventually it no longer grips its tab.

Replace one if it slides onto its tab with no resistance, or falls off; if the sleeve is cracked, split, melted or heat-discoloured; if the barrel or receptacle is corroded, green or burnt; if there is any scorching or browning, which on a connector means arcing or resistance heating; or if the wire can be pulled out of the crimp.

The intermittent fault is worth knowing. A terminal that has lost its grip will usually keep working while the machine sits still and then drop out when it is moved, because vibration briefly breaks the contact. A motor, pump or switch that cuts out when the machine is pushed — and comes back when it stops — is a loose connection far more often than it is a failed component.

Replacement notes

Isolate the machine from the mains before any cover comes off and keep it isolated throughout. Note or photograph where each lead lands first; a machine has several identical terminals and nothing on them records which tab they came from.

Strip the conductor to the depth the barrel takes, insert it fully so no bare copper sits outside the sleeve, and crimp with a proper ratchet crimp tool using the die for the wire range. Pliers close the barrel without producing the cold-weld a crimp tool gives — the joint looks right and then heats in service. Pull-test every crimp before it goes back.

Replace the mating male terminal at the same time if its tab is pitted, bent or discoloured. A new receptacle on a damaged tab will not fix the fault. Route the lead so it is not pinched as the cover closes, refit the cover gasket, and test on an earth-leakage protected supply before the machine goes back into service.

Twin City Vacuum has been selling and servicing commercial cleaning equipment since 1956 and keeps the common electrical fittings on the shelf.

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

Frequently Asked Questions

What does the QD Terminal 19503 do?

It is the female half of a quick-disconnect joint — the receptacle that slides onto a flat 1/4-inch male tab on a switch, motor or pump, so a lead can be unplugged by hand instead of unscrewed. The barrel is sized to crimp 22 to 18 AWG wire, and the sleeve insulates the whole fitting.

Does the 1/4 inch and 22/18 AWG have to match exactly?

Yes, both. The 1/4 inch is the width of the male tab: a terminal made for a 0.187 in. tab either will not fit or fits loose, and a loose quick-disconnect arcs. The 22/18 AWG is the wire range the barrel can crimp — thinner wire is never gripped, thicker wire stops the barrel closing, and either leaves a joint that heats.

My machine cuts out when I push it but runs fine when it sits still. Is that this part?

Very often, yes. A terminal that has lost its spring grip keeps contact at rest and breaks it under vibration, so the fault follows movement rather than load. Check whether the receptacle slides onto its tab with no resistance before condemning the motor, pump or switch.

How do I order the QD Terminal 19503 or get help?

You can add the QD Terminal F 1/4 in. x 22/18 AWG (part# 19503) 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 commercial cleaning equipment since 1956 and can help confirm the right part for your machine.

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