I recently got a treadmill from a friend in hopes of fixing it. The treadmill powers up and the motor works, the problem I am running into is that at around 3 to 4 MPH it trips my breaker. I tried plugging it into 3 separate circuits to make sure it wasn't a bad breaker. I tried plugging the treadmill i to a surge protector/suppressor and it still popped the house breaker. Everything I've found up until now says the problem may just be overworking the motor so I lubricated the belt today but the problem persists. Any guidance is appreciated as I have no idea what to do from here.