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Nordic Track NordicTrack T6.3 Treadmill Questions & Answers
Why is my nordictrack T6.3 making loud humming sound all of the sudden?
You don't oil belts as oil will eat away at the rubber. Start with running the machine and checking for lumps of wax build up at rollers (most common issue) if this is not it try oiling roller bearings. But call manufacturer first to see if your warranty is still good because as soon as you touch it it will void warranty.
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