49's had a pressurized radiator, the change was in 1942 Your radiator has been changed. It's ok, it will push water out sooner. Pressurized radiators can withstand a higher temperature. If your tractor has antifreeze the boiling point is higher, I don't remember the number. However, if your tractor has the cold-run-hot gauge it was meant for a pressurized radiator and will not have the correct range for non-pressurized. Working range for non-pressurized was 130-160, for pressurized 170-220.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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