I recently had my left rear idler bearing burn out. This does not sound to bad until I mention I ran the machine for some time before I discovered the problem. It sounded like gravel in the tracks and I was working with dirt loaded with #2 stone. To say the least it was trashed, so at that that point I just finished the job making sure I did not throw the track. I did the labor myself with help from Team Fountain. The part was almost $600.00. Not cheap but necessary. Two disasters in one week, trailer then the bearing. Team Fountain is still laughing.