Kirby 505,508 motors

[hoover300]

I had my 505 and 508 apart(no pics unfortunately) and noticed that the motors are very different. Both seem to be original, as they have "47" and "48" stamped on the rotors, respectively. They do not interchange, and the 508 one seems way beefier. It also has a larger cooling fan.
Neither have plates, as they are both rebuilds. Was this a factory thing, or a weirdly done motor swap?

 

[johnnyb59c]

?

hard to tell without pics. seems to me the they changed the motor design some starting with 508 and going to 514. the armature on 508-513 or 514 armature still had this skinny "star" shaped cooling fan. I'm guessing they started making the motors a little bigger starting with the 508. I know one thing that the 505 still had a bakelite cover coming off the bottom of the switch characteristic of the old "c" series and the 508 didnt

 

[johnnyb59c]

here a pic of 508-514 ive seen

this is a pic out of a service manual I have showing bent cooling fan

 

[hoover300]

That is exactly what the 505 one looks like, the 508 has a thicker cooling fan that is less star shaped, and the whole rotor piece is thicker and stubbier. i should have pics soon as I need to put my 508 back together, which involves taking the bearing back from the 505.

 

[johnnyb59c]

?

like this?

 

[hoover300]

YES exactly the one

 

[johnnyb59c]

replaced

i've seen a lot like that and a lot like the smaller cooling fan. i'm guessing they replaced it on your 508 with a larger cooling fan when they would rebuild. i think it make sense. the new style cooling fan would mean better airflow inside motor housing for better cooling maybe

 

[johnnyb59c]

i'm guessing

when they changed to the larger fan in the 516 they also replaced with larger fan on the earlier ones too( this repair manual is so fun to look at! its how i figured out some of the tips and tricks-however mine only covers 505-1CR

 

[hoover300]

Makes sense to me, but the thing is, the field has a larger opening for the rotor, and the rotor is much thicker and stubbier than the 505. Says 48 on it too

 

[johnnyb59c]

?

maybe the field coil was also replaced? my only guess. because my book says parts 505-515 are same. somethin' strange in this neighborhood...this is an overhaul book afterall so maybe the the later 505s were different and you have an earlier one? as far as i know they DID produce the 505 for 3 years skipping 506 and 507

 

[hoover300]

My 505 is a 47, and has the regular 3 amp motor in it. In the page you just posted, the armature in it is exactly like the 508. Compare it and the 505 pic, there is a big difference. I will have to post some comparison pics soon of the two together.

 

[johnnyb59c]

cool

I have noticed on the 505s i've worked on had a round hole where the switch goes but the one in the parts pic has a larger square hole. i have a 514 and it does seem a little different

 

[johnnyb59c]

just a thought

do the front bearing plates look the same on both?

 

[kirbyclassiciii]

johnnyb59c

I have a Dual Sanitronic 80 and a Classic 1CR, therefore, I would like to ask you this question: may I please have you scan or take pictures of the appropriate pages from your service manual covering these two machines (including the parts diagrams themselves)?

I am most interested in the parts diagram and list for both the 1CR and the D50 & 80 as well as the service procedures for models D50 & 80, since I already have a revised version of the 1CR service procedures (updated in 1974). In addition, I would like to see what the wiring diagram for models D50 & 80 looks like, please (a picture of my D80 wiring setup will be attached for proof).

Thank you,



Ben[this post was last edited: 10/22/2020-03:30]

 

[texaskirbyguy]

Your 505 has the original 3A motor with the longer, skinny armature windings. Your 508 has the later 4A motor in it with fatter, shorter armature windings.

Somewhere back in time Kirby discontinued the 3A motor and intended any bad 3A motors to be replaced with 4A motors (both field and armature). Therefore the parts book you have reflects that and that is by you see the same motor in all 5xx units.

I still have the original 3A motor in my 505 - has a unique sound to it.
My resto thread shows the 3A rotor in picture in reply #5.
https://www.vacuumland.org/cgi-bin/TD/TD-VIEWTHREAD.cgi?34158_27

 

[johnnyb59c]

pics from years ago

i will try to find the old manual and photograph new pics. you say service procedures you need help with? I've always done it the way my uncle taught me without the manual

 

[kirbyclassiciii]

johnnyb59c

Yep, those are the ones I wanted... thank you!

Yes, as to the D50/80 service procedure pages. And if I see that right, that print date says June 1972. That is exactly how old my Classic 1CR is.

More trivia: the very first Classic 1CRs produced in early 1970 had the exact same fan case (120065S) and front axle (131656S) as the D50/80, only the two front wheel screws were different in that they were longer (10-32 x 3/4" long) to accommodate the new wider front wheels.

~Ben[this post was last edited: 10/22/2020-14:51]

 

[johnnyb59c]

I like Kirbys

whats your favorite model? whats your oldest model?

 

[kirbyclassiciii]

johnnyb59c

Favorite models? My 1969 D80, 1972 Classic 1CR, 1979 Tradition 3CB or 1984 Heritage II.

The first machine I mention is the oldest model in my Kirby collection.

~Ben