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 Posted: Wed Dec 2nd, 2020 11:29 pm
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Ed Teach
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 Is it normal for the brushes on a Northwind 450 fan to spark when running. Like a brush drill does when its running? I have seen some that do and others that don't so much.

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 Posted: Thu Dec 3rd, 2020 10:45 pm
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Steven P Dempsey
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 To a degree - - I think a dirty commutator or loose/worn brushes can cause that
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 Posted: Fri Dec 4th, 2020 12:58 am
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Anthony Lindsey
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 make sure the springs are pushing the brushes firmly up against the commutator.   I have had brushes rub at the end of the barrel because of build up over time.
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