How To Clean Grease From Inside Of A Electric Motor Windings

Sorry for the repost; now, I know at that place'southward a adept reason reason for the icons in the subject line and how to select the right ane.

Once again:

I opened upward the gearbox of a gearhead motor to renew its grease. Unfortunately, whoever did that job the last fourth dimension thought it was all correct to just add together more grease on acme of what was in in that location already. As a effect of the madman with a pail of grease, a lot of the onetime (real sometime!) grease has migrated into the motor. What started out as a unproblematic re-lube has turned into a total disassembly.

At this time, I have pulled the field from the motor and I would like to make clean information technology of the glutinous, old grease as much every bit possible without harming the windings and motor leads (rubber insulation, textile jacket). Can anyone recommend a solvent which would be safety to use?

Thanks one and all,

Rich

Post past **Jim_Popa_N_CA** » Sunday Mar 27, 2005 3:10 pm

Way back in my maint. elec. days there was a product called, if I call back, "Inhibisol".....It was bang-up for your purpose and left no residuum......This was before EPA and OSHA came into being, so Information technology may no longer be available.....Unless you have the ways to soak and spray out the windings thoroughly, I would propose taking it to a motor repair shop for cleaning.....They might not charge all that much just for cleaning, as compared to the toll of buying solvent you might non use again.....Just a thought....

Good luck, Jim [img]/ubb/images/graemlins/smirk.gif"%20alt="[/img]

Mail service by **vinito** » Sun Mar 27, 2005 3:52 pm

I've simply apply mineral spirits successfully. I tried it first on a motor that wasn't a big loss if it melted the varnish. Information technology didn't. Afterward cleaning for a couple minutes in the parts washer and blowing it off with compressed air, the varnish didn't soften at all and the motor worked fine. Tried it on a second motor - same thing.

I accept reservations recommending it because I don't know chemistry enough to know if there is no take chances, just I haven't had any problems in my personal experience. What I know for certain is shellac is solved by alcohol so don't utilise that. Alcohol will brand shellac tacky in less than one minute, and the mineral spirits didn't appear to soften the shellac at all. Plus information technology's uncomplicated & cheap.

Good luck.

Mail service by **MikeC** » Lord's day Mar 27, 2005 6:54 pm

Vinito is absolutely correct, use mineral spirits.

I ran into the same thing in the motor of my large lathe, but it was a mixture of cutting oil, grease, dirt, and cast fe dust that made a sort of industrial adobe. I had no idea how to clean it out, but one of the guys at the museum is a retired Power Co engineer that worked easily-on in the hydro plants. He said they utilise mineral spirits even on the huge generator windings. I used an ancient oil fogger gun as a pressure level washer and gave information technology a good hosing out. Looks like new at present. Just requite it a day or so to evaporate earlier you run the motor, otherwise, y'all might add a new meaning to the term "burn down information technology up".

steve-ma · Mail by **steve-ma** » Dominicus Mar 27, 2005 vii:34 pm

The older the motor, the more likely that today's solvents will attack something. I learned the hard mode cleaning an onetime motor. Mineral spirits started to soften the rubber similar insulation on some of the wires. Mineral spirits won't usually soften the varnish on windings. I would test it beginning. But don't forget nearly good old grease cutting soap and water. As long as you lot allow it dry out starting time, yous'll be ok.

Post by **THX0001** » Sun Mar 27, 2005 8:01 pm

Thanks vinito, Jim Popa and Mike C. for all the practiced input. Jim's proffer to have it to a motor shop is probably the best mode to get, but since it is Easter dark, I'm biting at the scrap to get this washed and I take a pail of mineral spirits, I'thousand going to flush it out with that.

I was a little gun shy to take chances anything because of something that happened a few years ago. I was involved in a lighting upgrade at a mall. They had some fountains which had stopped dancing so as an improver we said we would take the submersible pumps redone and accept our crew hook them up. The motor shop did their matter which included tagging on new SO drop cords and filling the motors with tranformer oil. Bad idea. The insulation of the SO cord wicked upwards the transformer oil until information technology swelled so much it looked, and felt, like uncooked Italian sausage. It seems the proper oil was vegetable oil correct off the grocery shelves.

Thank you over again,
Rich

Post by **ajsalmi** » Sun Mar 27, 2005 11:41 pm

The best stuff I have found for cleaning oily stuff is super clean, which is a lye based stuff. The merely thing I have institute that it attacks is aluminum and your hands.

Post past **harleyfatboy** » Mon Mar 28, 2005 6:59 pm

I'd use carbeurator cleaner. It won't hurt nothing and evaporates quick. Or apply brake pulsate cleaner like at the parts stores.

Mail by **MikeC** » Monday Mar 28, 2005 8:22 pm

Uh, carb cleaner is designed to dissolve VARNISH, basically the aforementioned thing as Glyptol, the insulating coating on the wires of the windings. It will indeed hurt something... unless yous plan on having the motor rewound before you start it. I'd also be very worried almost using the brake cleaner for the same reason. It'southward a veruy strong and light solvent, that would probably strip the Glyptol as easily as the grease.

Bill D. · Mail by **Neb D.** » Mon Mar 28, 2005 11:07 pm

I concord restriction cleane ris a bad thought. I know that rubbing alchol works well to clean brakes si I have to wonder what existent brake cleaner wil ldo to shellac. How almost hot water and soap. No high pressure just a dip and run over information technology with a soft brush or rag. If the wate is hot it should dry chop-chop an dnot rust. I hosed out my arc welder when I got it at a garage sale. let it dry several days in 100 caste sunday, worked fine.
Bill D.

Mail service by **Orrin** » Tue Mar 29, 2005 11:10 am

I'm chiming in a fleck late, hither, only hither goes, anyway.

My son was an electrician in the Coast Guard and his cutter used a Diesel fuel-electrical drive. Keeping the main propulsion motors clean was one of their bigger jobs.

There are solvents made especially for the job of cleaning motor windings. 1 that my son used was Electron solvent. He gave me a sample of it and it seems to work very well.

McMaster-Carr sells a like product. Get to their Spider web site...

http://www.mcmaster.com/

..and under the heading, "Lighting and Electrical" click on "Electrical Cleaning and Maintenance" So, curl down the page to "Motor Cleaners."

That ought to work for youl.

Regards,

Orrin

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