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Thread: drying a motor
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13th January 2014, 08:36 PM #16SENIOR MEMBER
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13th January 2014, 10:35 PM #17.
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It not usually a problem on a hot dry day but would not recommend metho or any volatile liquid on cooler humid days for drying something with too may nooks and crannies. As the volatile liquid evaporates it can condense water out of the atmosphere and you can end up with more water than you started with.
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13th January 2014, 10:44 PM #18Senior Member
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cleaning motors
Hi Phil
Give it a final flush with HOT water and leave it in the sun to dry out.
Roger
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14th January 2014, 07:31 AM #19Philomath in training
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14th January 2014, 07:48 AM #20SENIOR MEMBER
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Turps is ok... Isn't it??
Phil
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14th January 2014, 08:02 AM #21Senior Member
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Yes Phil. Just take a litttle longer than petrol.
Hooroo.
John
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14th January 2014, 09:33 AM #22Member
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2$ cans of Aussie Export degreaser from supercheap are much better - the glycol esther doesn't attack paints/laquers nearly as much as even turps (I buy it in boxes of 12 cans at a time - I have one in the washup sink for washing my hands with if i'm greasy). Spray with degreaser, work with paint brush, rinse with water, dry.
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14th January 2014, 02:26 PM #23Member
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Spot test by rubbing a little bit of cleaner you are going to use on the winding enamel, if its friendly then you are safe to proceed. I would use citrus based degreaser along with a paint brush to scrub clean. Then air dry with compressed air.
The magnets in the motor(if there is) are sensitive to high heat. Do not bake higher than 80C.
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14th January 2014, 03:02 PM #24
Mmmmm another bulk-buyer of the all too handy cheap degreaser!
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14th January 2014, 03:11 PM #25cheers
David
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A society grows great when old men plant trees whose shade they’ll never sit in. (Greek proverb)
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14th January 2014, 04:50 PM #26
Time to put a few myths to bed..
The enamelled copper wire used on motor windings is not going to be damaged by high pressure water.. for that matter, I've never found a solvent that would dissolve that stuff, when you are tinning enamelled copper wire to make connections, the easiest way to get rid of the enamel is to burn it off, failing that, scraping with a sharp knife works as well.
The varnish dip that's used after winding, is more to hold the windings in place, nicely bundled. That stuff is sometimes thermosetting, and could be softened by heating, but keep the temperature down while baking and should be no problem.
There are no permanent magnets in an induction motor, as such it's not a problem, but just for completeness, you won't damage a magnet by heating unless you get above the curie temperature, which for typical magnets like alnico is over 700C, for Neodymium it's 300C or so and for iron its over 1000C which, by the way is a good test to remember for when you are heat-treating something, that is you heat till the iron becomes non-magnetic, that is a magnet won't stick, that way you know you are above the curie point then quench..
While on the topic of magnets, you can damage magnets, in things like stepper motors, by removing the poles and, just removing the armature in a stepper motor can be a tricky business because of loss of magnetism in the permanent magnets.... another topic altogether.
Ray
PS.. Just thought of something that might be misleading, the connections inside the motor are not usually soft soldered, as might be implied by my reference to tinning, they are generally twisted and brazed.
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14th January 2014, 08:59 PM #27SENIOR MEMBER
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Well I did what ya said
Well sort of. What I thought was a container of Mineral turpentine was actually Kerosene.
I made an executive decision and used that in the degreasing gun then immediately followed by degreaser also in the gun.
Then rinsed and refilled the gun with water and rinsed it, twice.
I then used compressed air to dry it out until the neighbour over the back complained about the noise from the compressor running.
I sat it out in the sun for the next two hours. It's pretty damn hot here at the moment.
I might even take it to work tomorrow and stick it on top of the boilers. It's even hotter up there .
Phil
DSCN1267.jpg DSCN1269.jpg
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14th January 2014, 09:09 PM #28
Hi Phil,
Looks pretty good... today got to 43, same tomorrow.. no need for ovens.
I sometimes forget to switch off power to the compressor, and with a slow leak, it cranks up at 3 in the morning... then it's my wife complaining, and I have to get up and switch it off.
Ray
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14th January 2014, 09:29 PM #29
Yes. I am wondering why people are talking about ovens. Not much point at this point in time.
I also leave the compressor on and guess who complains. I cannot complain too loud tho cos she often turns off the shed light when I forget.
I would have suggested pressure cleaning, but then that is what I am doing at work at the moment. Last week, this week and the 3 or 4 weeks before the Xmas break. I have been working outside since coming back to work. In and around a tank farm. 175kl insulated tanks so lots of glare, but some shade at least. There are worse jobs than pressure cleaning in this weather. Today I took a small SS thermos with ice and water. I hung it inside an empty tank (most of them at the moment) and then noticed that the brine (chilling) was running on the tank across the aisle so swapped tanks. Now I have a 175,000 litre fridge to keep my water cold.
Dean
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14th January 2014, 10:11 PM #30cheers
David
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A society grows great when old men plant trees whose shade they’ll never sit in. (Greek proverb)
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