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 Posted: Mon Nov 11th, 2019 12:05 am
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Dan Robillard
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Finally got into a GE 506836 BMY thats been sitting around the shop for a couple of years and I need some advice on cleaning the windings. I mean they are filthy! What is everyone using to get this dried up hardened crud of the windings? I think the pictures will say it all. I'd like to clean it before I change the headwires.Thanks.







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 Posted: Mon Nov 11th, 2019 12:54 am
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William Dunlap
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I hope these are not issues for you. They look suspicious to me.

I clean my stators with a high pressure wand with ordinary paint thinner I buy at the Ace Hardware.
They come out looking pretty nice. Let them sit in the sun for a day to purge the solvent.

Cheers,
Bill

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 Posted: Mon Nov 11th, 2019 02:14 am
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Lane Shirey
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CRC Lectra Clean

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 Posted: Mon Nov 11th, 2019 02:43 am
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Dan Robillard
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I saw the bald spot and I've yet to investigate. The thread you found is just that... one of the threads wrapping the insulation around the stator. It scared me to!!!
Thanks bill. Paint thinner I have plenty of.

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 Posted: Mon Nov 11th, 2019 02:45 am
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Dan Robillard
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I think I can get Lectra Clean at a shop in Baton Rouge. Thanks Lane.

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 Posted: Mon Nov 11th, 2019 10:22 am
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Lane Shirey
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Home Depot sells it and I assume Amazon,  you can liberally spray the stator until it runs through the windings without harm.  Just let it dry thoroughly before varnishing.  I usually wait a couple of days so it can dry deep in the windings.  

I’ve found that while cheaper, even the odorless mineral spirits can leave an odor when you run the fan and the coils heat up a little.  And it’s flammable unlike Lectra Clean. Just don’t breathe the Lectra clean as you’re spraying it, and wear gloves. 


Lastly, the cloth that’s rubbed off IS the magnet wire insulation, and not some sort of coil covering, so be sure to varnish that stator after you clean it. Early coil wires didn’t have the lacquer or epoxy insulation that modern magnet wire has, they used a silk insulation to prevent shorts. 

Last edited on Mon Nov 11th, 2019 10:30 am by Lane Shirey

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 Posted: Mon Nov 11th, 2019 12:58 pm
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Dan Robillard
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Lane... I'm assuming this is the stuff. I don't know if its chlorinated and if that will hurt anything, but I'm going to head to Home Depot and pick up a couple cans. I think I'm a little low on the spray varnish so I'll have to pick up a couple cans of that too. Thanks for the advice. I'll have to put it in front of a heat lamp cause the temps are supposed to drop into the 20's tonight. 

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 Posted: Mon Nov 11th, 2019 10:46 pm
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Lane Shirey
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That’s the stuff!

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 Posted: Tue Nov 12th, 2019 12:38 am
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Mark Olson
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I vote for Lectra Clean. It is available in most auto parts stores.
As another resort, mineral spirits works well, especially if you douche it good with clear spray varnish afterwards.
Keep putting the motor varnish on until it quits soaking in. That may take several days, letting it dry between
douches. Stoving the stator at 200 in the oven speeds it along.


YMMV

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 Posted: Tue Nov 12th, 2019 06:09 pm
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Richard Daugird
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Good info here.

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 Posted: Wed Nov 13th, 2019 12:54 am
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Darrell Koller
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That is the ONLY thing you should use for cleaning. I also recommend
MG Chemicals Red Insulating Varnish
https://www.amazon.com/dp/B00DGKDOHC/ref=twister_B00S4H8V1Q?_encoding=UTF8&psc=1


 Lane Shirey wrote: CRC Lectra Clean

Last edited on Wed Nov 13th, 2019 01:09 am by Darrell Koller

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 Posted: Wed Nov 13th, 2019 01:18 am
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Darrell Koller
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Let me rephrase that... "That's the ONLY thing that I would use for cleaning".

Darrell Koller wrote: That is the ONLY thing you should use for cleaning. I also recommend
MG Chemicals Red Insulating Varnish
Lane Shirey wrote: CRC Lectra Clean

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 Posted: Wed Nov 13th, 2019 03:45 am
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Rod Rogers
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I use nothing more than a paint brush & compressed air (GENTLY!). It's just not worth the risk of dissolving something that shouldn't be! It will be inside the motor housing, and just not that visible. (On some old stators, the dirt may be the only thing insulating the turns from one another.)

The red insulating varnish is fine, but just remember it doesn't fix a stator with any kind of short. It's really just "paint"!

~Sparky~

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