While using my 9n tractor my battery went dead.  I realized the battery was not being charged while it was running.  Thinking it was the battery, I bought a new battery, but that didn't fix the problem.  I changed the voltage cut out, no luck.  I think I need a new generator for the tractor.  Where is the best place to get reasonable parts for the tractor.  How do you find part numbers.  I think I have a 1946 -47 tractor. Serial number 9n-243131.  Most catalogs don't list the later year models for parts. Any help you can give me, I would appreciate it.