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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