I have a Craftsman compressor that has been working well. However I was replacing some of the worn parts. things going well then it happensd I broke a piece and then the trouble started one thing lead to another and I took it apart and was doing well but you know how copper pipe, but got together. Turned on compressor and did not look soon enough and found the knocking was the fan breaking breaking off the fan blades. Have not found the right fan yet maybe out of stock. Anyways anyone know a compressor fizz my help with suggestions or just mark it as a life lesson. Live in the Clemmons Winston Salem area.