I have a couple of these machines at different schools, but i am having a similar problem with both of them. They go thru fuser drive gears faster than they should. One I have been on 4 different times since placing it there at the end of school last spring. I have replaced with the new type gear and motor and also the white plasitic gears driven by this gear, and still have had to go back within 3-4 weeks. The fuser rotates freely I cant see or feel any binding. Am I missing something or do I just have a couple of dogs to deal with.