We recommend loosening the screws of the contact holder so that it has a little bit of play, then rotate it clockwise, and re-tighten the brush holder while holding it in position. It works well to get rid of squeaks. We don't suggest using lubrication and sanding is not good in the long term. Let us know if you have any other questions.
Modified on: Thu, 6 Apr, 2017 at 4:30 PM
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