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Desperta Ferro!
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2,326 Posts
Not oil, it typically attracts dust.
Try a dry lube like graphite.

I second the ball bearing probability.
That is typically the most common cause of electric motors not spinning. I would hazard a guess that the fine dust particles got into the area housing the bearings.

You could try using an air compressor to blow out the inside of the case to remove as much foreign matter as possible, then try using the graphite lube on the bearing area.

You may have to manually rotate it a few dozen times to get it to spin properly, but if I were in your shoes, that's what I'd do.

Good luck! Please update & keep us posted on your maintenance, I'd be interested in hearing what you do to fix that device.
 

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Desperta Ferro!
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2,326 Posts
That's a 5 microfarad, 10,000 volt cap.
It appears to be dielectrically passing current, and you are on your capacitance scale, depicting 5 uf.

My guess is that component is good, but swapping it out would be the sure way to tell.
 

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Desperta Ferro!
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2,326 Posts
One other thought occurred to me.
Perhaps the motor brushes are covered in that drywall dust.
I've got a hunch that dust is the underlying cause.
If you do have a portable air compressor, I recommend disassembling the unit as others said previously, then blowing it all out as a first step.
 
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