Kirby 1CR motor transplant into D50 or D80!

[vaclab]

I've Tested Two D80's And Here's My Numbers

The first one was a wreck (never rebuilt), but still pulled around 5.0 Amps, fan only, no brushroll or light bulb.

The second one Kirby rebuilt in 1990 and I refurbed in 2018.

Motor Speed = 11,152 RPM (BR Spinning)
4.8 Amps, Low Speed, BR ON, Bulb ON

Motor Speed = 11,680 RPM (Low Speed, BR OFF)
4.4 Amps, Low Speed, BR OFF, No Bulb

Motor Speed = 13,680 RPM (High Speed, BR OFF)
5.9 Amps, High Speed, BR OFF, No Bulb

 

[texaskirbyguy]

Bill, it almost looks like your D80s might have had replacement motors added to them (or perhaps 1CR motors?) Have you had them apart to check part numbers on them? I have one D50 with an aftermarket GE motor that runs at those currents. I actually thought it was bad long ago because of it but now changed my opinion. That motor had a unique field and armature very different from factory parts. The original D series could not draw over 5A on high with hose to meet the UL rating plate current of 5A. I will be getting another D50 in soon so i can get measurements on it, too.
Fun stuff...

 

[lesinutah]

Rob

Mid run on d80 they switched manufacturers. I don't know the amps I was pulling. I got 132-137 cfm with brush roll and belt engaged. Altitude can cause a 10% difference.
Les

 

[vaclab]

Take A Look And Tell Me What You See

Rob, I don't see anything in the below videos to indicate something unusual, especially with the "lost cause" video. Can you tell if parts were upgraded?

Kirby Dual Sanitronic 80 (Bill's Lost Cause)


Kirby Dual Sanitronic 80 Teardown And Bathtime


These videos represent two different D80's. They are not the same machine.

And I've learned through a massive amount of power testing that U.L. ratings are "suggestions" rather than absolutes. For example, I've seen 10 Amp motors run at 12 Amps under load and 12 Amp motors never pull more than 11 Amps no matter what carpet you run them on.

Bill

 

[texaskirbyguy]

Bill, in your first video, the rotor looked to be unusual, given the varieties of numbers on it and the 115V that appeared hand-written. Also I see '959' on it. The rotor for the 516 to S7 was 114959, so it might be that mixed with a (possibly) original field. Could have been a rewound rotor, as that was popular back then when they used to repair stuff.
Kirby original rotor part for D series is 114967
This one also sounded hotter than a stock D-series. Having grown up with my mom's D50, that unique sound is locked in my brain...

I could not see any numbers in the second video so cannot comment on that one.

 

[kirbyclassiciii]

texaskirbyguy

Rob,

From 1972-73, the Classic 1CR fan case changed from the old style used on the D50/80 to a new style to support the groove on the back of the rug nozzle casting.

But, in recent replacement (since about 1979), the Classic Omega 1CB's fan case (120073) is used, and like the 120065 fan case, does not have the protrusion to support the groove on the back of the nozzle casting for the 1972-73 Classics.

~Ben