Posted by Athol Carr on March 02, 2010 at 00:07:02 from (219.89.91.213):
In Reply to: F-12 hyd lift? posted by GNP Fatboy on March 01, 2010 at 15:36:09:
The F-12 has 54 inch diameter wheels on the back. These are larger than those on the Farmalls H or M which had 51 inch wheels if on steel. The hydraulics unit came out about 1935, but I have never seen one in NZ. Lots of F-12s and F-14s just none with the hydraulics lift. Why the Farmalls H and M did not copy the lift are arrangement I do not know, would have been a good step towards a 3 point lift later in life. The rotating vane aspect must have caused maintenance difficulties as no one seems to have copied that aspect. Instead most systems use a standard type hydraulic cylinder operating a crank shaft to rotate the arms. At least the piston would be easier to seal than the sides and end of the vane in the F-12 system
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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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