I have my grandfather's John Deere thrashing machine. I think it was built in the late 1940's. It's painted the traditional green and yellow, but the only serial tag that I found on it says it was manufactured by the Hart Carter Company of Peoria, Illinois. The serial number is H51865. I would like any kind of information on this unit such as how many were built for JD, for how many years, what year is the one I have? Also would like to know if there is someone or someplace that repairs the flat belt pulleys that are used on this unit? I think I read or heard that John Deere purchased the Hart Carter Company' just curious if anyone has more information on this? I also thought it was unique as far as the fact that it has round spoke rims with rubber mounted tires as most thrashing machines are on steel wheels. Any information, literatures, or knowledge shared would be greatly appreciated.