Craftsman Garage Door Opener
I attempted to open my garage door today. It is pretty cold. The door opened about three (3) feet and stopped. The motor hummed but the drive/door would not move in either direction. I removed the cover and found a large amount of white nylon/derlyn shavings. The drive gear has no teeth. The door springs are good. The door appears to be properly balanced; stays up; stays down; stays in position both half way up/down. I am thinking of replacing the Gear and Sprocket Assembly using the complete kit #41C4220A. Is there something else I should be looking for that caused the gear to strip or is this pretty normal for a fifteen (15) year old door. None of the gears in the opener assembly have ever been lubricated.