1) The belt is not remaining centered and sways to one side (the right) when in use. 2) The speed of the treadmill is constant as per the display until I start walking on it. The belt then begins to drag and the display speed decreases. I then get off the treadmill and the speed increases significantly and an E3 error is displayed on the console. The treadmill is several years old and I have misplaced the owner's manual. How does one adjust the belt? Is it possible the treadmill needs lubrication? If so, what is the best lubricant to use?
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