Quote:
Originally Posted by chillyphil
As I'm replacing the brushes should I do all four, or just the two low speed?
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That's really up to you. You will almost certainly find that the high speed brush (purple wire) is hardly worn at all because it should never come into use. You could leave that one and keep its replacement in stock as insurance for the future!
You don't need to make a decision until you've opened the motor and assessed what needs doing.
Don't miss
Arctic's brilliant photographic guide on brush replacement!
Simon