Thread Number: 17510
My Rainbow D4 SE
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Post# 188928   7/7/2012 at 18:22 (2,827 days old) by eurekastar (Amarillo, Texas)        

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I took Fred's advice and put the motor parts through the dishwasher.  I did so with a little anxiety.  But alas, it all turned out well!  I didn't run the main housing parts through the dishwasher.  But after seeing Fred's photos in another thread, I feel confident to do that in the future.  My hand washing of the main housing wasn't as thorough as the dishwasher would be.  But I did use bleach and laundry detergent to make certain it was sanitized. 

Post# 188931 , Reply# 1   7/7/2012 at 18:25 (2,827 days old) by eurekastar (Amarillo, Texas)        

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I won't post a lot of photos, but I would say that an important step is to grease the lower bearing since it has the most exposure to moisture.  The oil provides a barrier to moisture and helps to prevent rust and corrosion. 

Post# 188932 , Reply# 2   7/7/2012 at 18:27 (2,827 days old) by eurekastar (Amarillo, Texas)        

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After the lower bearing is greased, I applied a liberal amount of grease to the slinger ring before placing it on the bearing.  It helps to supply grease to the bearing in order to provide a shield against moisture. 

Post# 188933 , Reply# 3   7/7/2012 at 18:29 (2,827 days old) by eurekastar (Amarillo, Texas)        

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Once the the slinger ring is in place, you can then install the bearing retainer clip. 

Post# 188934 , Reply# 4   7/7/2012 at 18:32 (2,827 days old) by eurekastar (Amarillo, Texas)        

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Once the bearing retainer clip is in place, it's now time to install the spider!  The careful I will note that I forgot to install the air guide first.  So I had to remove the spider and back up one step. 

Post# 188935 , Reply# 5   7/7/2012 at 18:33 (2,827 days old) by eurekastar (Amarillo, Texas)        

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And this is the air guide I forgot to install!

Post# 188936 , Reply# 6   7/7/2012 at 18:40 (2,827 days old) by eurekastar (Amarillo, Texas)        

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Once the motor was reassembled, I thought it would be important to test the motor before putting the entire vacuum together.  I did test everything with my multimeter and it checked out OK.  But this is the true test.  Everything check out OK, so it's now time to move to the next step of the reassembly process.  If you need to seat motor brushes, I would think this is the time to do it.  But the old brushes were just fine, so I simply reused them. 

Post# 188937 , Reply# 7   7/7/2012 at 18:44 (2,827 days old) by eurekastar (Amarillo, Texas)        

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Once it got it all reassembled, the last step was to install the gasket onto the motor flange.  I just a little weatherstripping adhesive from the automotive department at Walmart.  I think a little bit of that stuff goes a long way.  It's all clamped down to the water basin right now to allow the adhesive to get set. 

Post# 188945 , Reply# 8   7/7/2012 at 19:40 (2,827 days old) by HooverCelebrity ()        

Is that really what the "slinger ring" is for?  I wondered why that part was in there; I was prepared to put everything back together without putting grease over the outside of the bearing.  It's a sealed bearing to begin with -- so I'm not sure that putting the grease on the bearing is going to really do anything.  I figured the slinger ring is just to keep water away from the bearing in case any water would splash up behind the spider.  I would think, too, over time -- the grease hanging open and exposed like that may dribble down the motor shaft?


Great pictures!  My parts are supposed to arrive on Monday.  It's like a kid waiting for Santa to come...


My spider also looks completely different than the one you have.... wonder why that is?  There's almost a "cup"around the motor shaft.  Of of the replacement spiders I saw online, none of them looked like the one in my machine.

Post# 188949 , Reply# 9   7/7/2012 at 20:56 (2,827 days old) by eurekastar (Amarillo, Texas)        

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Fred, I think the slinger ring serves a dual purpose (and this is a little bit of guess work on my part).  First, it helps to hold the bottom bearing in place once the retaining clip is installed.  And second, it's designed to hold grease.  I believe it is called a slinger ring because it's designed to "sling" grease onto the bearing face and armature shaft.  The lower bearing used today is double sealed.  But I think the grease is used as a precaution against moisture.  It probably is overkill today because of improved bearing design.  I'm guessing the grease is not really necessary (if the machine is properly maintained).  Plus, when the spider is installed, it is seated into the slinger ringer thus providing an additional seal.  The main reason I used the grease is because the guy who owns the local vacuum shop told me that's what he does.  LOL!  I have a spider on another D4 that's like yours.  I think that is an early design for the D4.  I kind of wonder if it's design is intended to concentrate airflow.  Not sure!  Can't wait to see yours when it's all done! 

Post# 188950 , Reply# 10   7/7/2012 at 20:59 (2,827 days old) by eurekastar (Amarillo, Texas)        
And here she is!

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She's all dressed up and ready for her first spin around the house!  In her first work out, she did an outstanding job too!

Post# 188951 , Reply# 11   7/7/2012 at 21:01 (2,827 days old) by eurekastar (Amarillo, Texas)        
@ Fred

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By the way, that's a great idea using an egg carton for screws and small parts.  That beats the baggies that I've been using!  Smile

Post# 188954 , Reply# 12   7/7/2012 at 21:19 (2,826 days old) by shelly (california)        

Wow! This is very interesting, I'm amazed that you can put all these thing in the dishwasher. You did a beautiful job and the SE looks very happy.

Post# 188983 , Reply# 13   7/8/2012 at 03:47 (2,826 days old) by pr-21 (Middletown, OH)        
Another very interesting thread....

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Wow, you guys just amaze me with these breakdown pictures. Absolutely amazing. Fred you have a really nice Rainbow, that will give you years of service. I still have mine. If you clean the separator after each use and wipe the flange, that is all the mntc it will need for a very long time. I told Ken Bashford on Friday, when I was ordering the longer 14ft hose, that he needed to read the forum and see all the interest generated about the newest Rainbow. He said he had read some of it, but not all. I would have loved to have seen his demonstration in Texas....

Anyway goodluck with your Rainbow, I am sure you will like it alot.


Bud Mattingly

Post# 189053 , Reply# 14   7/8/2012 at 17:44 (2,826 days old) by eurekastar (Amarillo, Texas)        
Slinger Ring

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Fred's question about the "slinger ring" piqued my curiosity, so I did a little research using Google.  First, I found that they are used on propeller shafts in order to "sling" antifreeze onto the shaft.  I also found that they are used in electric motors and generators to sling oil onto the bearings.  I guess that would include the armature shaft. Looking at Rainbow schematics that I've found online, the part dates all the way back to the Model D.  It wouldn't surprise me if it was utilized on earlier models too.  So my guess is that back in the day when open bearings were used, it acted as a bearing seal and would also provide additional lubrication to the bearings somehow.  Again, it's just a pure guess.  However, with the use of double sealed bearings, it may be a redundant item.  Or it may just serve ONE purpose today and that is to help hold the lower bearing in place.  It makes me think of the finger spring in a Kirby motor.  Early on, it was needed to hold the bearing seal in place when Kirby was using open face bearings.  But with the move to sealed bearings, I wonder if it is even needed.  I don't know if it's found on the G series motors, but it was being used all the up through the Tradition.  I wish I knew someone with a Rainbow service manual.  That would explain it for sure, because my guesses are probably way off mark!

Post# 189143 , Reply# 15   7/9/2012 at 13:19 (2,825 days old) by mark40511 (Lexington, KY)        

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Looks good! I'm amazed you can put all that stuff in the dishwasher too!

Post# 189299 , Reply# 16   7/9/2012 at 21:46 (2,824 days old) by eurekastar (Amarillo, Texas)        
@ Mark

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I would have never thought to do it had it not been for Fred Stachnik's suggestion. 

Post# 323456 , Reply# 17   4/27/2015 at 14:50 (1,803 days old) by kl1r1k ()        

I need the capacitor parameters on the same model.Main blow and i lost him. Please email me at Thank you a loot

Post# 382981 , Reply# 18   12/21/2017 at 20:29 (833 days old) by Timborow (Georgia)        
D4C hose

Will these hoses and pn fit a Rainbow D4C?


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Post# 382988 , Reply# 19   12/21/2017 at 21:31 (833 days old) by huskyvacs (Midwestern US)        

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What kind of that red grease did you use for it? I mean, brand and type?

Post# 383016 , Reply# 20   12/22/2017 at 17:03 (833 days old) by Ultralux88 (Denver, Colorado)        
Will these hoses and pn fit a Rainbow D4C?

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No, the machine ends a totally different between the D4 and E2 (no such thing as an E1!).

Post# 383040 , Reply# 21   12/23/2017 at 00:58 (832 days old) by vacuumdevil (Vacuum Hell )        

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Looks great! Wouldn't this be considered a vintage machine?

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