simple motor question for vacuum fix

Old 05-31-13, 06:52 PM
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simple motor question for vacuum fix

I took apart a vacuum after it seemed to have a short: would or wouldn't power on correctly. Has that burnt smell, a bit. But read online that may only indicate the motor is going yet has some life in it. Read online about blue spark around the commutator and it appears the blue spark wraps all around it.

Question is, I see a black line around the top of the commutator, about half a millimeter thick (black and gooey looking like melted plastic or glue or something) and not sure if that means I can just replace the brushes or must replace the whole motor (in w/case I'll simple replace vacuum).

Would really appreciate any feedback as to whether I can repair this thing or sh*tcan it.


Old 05-31-13, 07:28 PM
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Look at the comminator and see if it's worn in the middle or all gouged up.
If not you can clean the segments with a pencil eraser. Use a volt ohm meter to check for OHMs between the segments, should be infinity on every one.

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