I have two. One has been used maybe 10 hours or less. The other has a rubber drive wheel that is going away. The first one has been in its original box for 30 years and wont start although juice is getting to it. I would like to locate a schematic with which I might get someone to solve the sure simple problem of getting #2 to start. The rubber wheel should be around someplace but where? Any help would be much appreciated.