Posted by athol carr on September 03, 2009 at 02:04:16 from (194.144.68.97):
In Reply to: O-12 vs I-12 posted by WHISKEY BENT on September 02, 2009 at 18:54:57:
The early O-12 before serial number OS-1946 if my memory is correct, I am at present in Iceland and my manuals are out of reach, had the small 6.00 x 9'' tyres on the front and 9.00 x 24" tyres on the back. After Os-1946, sometime in mid 1936, they put a longer front axle on (ex narrow track 10-20) with 6.00 x 16" tyres on front and 11.25 x 24" tryes on back. They also changed from foot clutch to hand clutch and from hand brake levers to foot operated brakes and changed the seat from the padded basin like seat to the MB488 metal pan (as in mowers and binders etc.) which side hinged to allow easier access. The Fairway 12 (same tractor series but with serial FOS-xxxx) retained the smaller wheels, foot clutch and the original seat. The Fairway tractors had only a single brake pedal working very large expanding shoe brakes in the back wheels (the drums are there on the O-12 wheels but not used though the early O-12 had these brakes as an extra option, this disappeared with the Modified O-12 after OS-1946 as there was no room for the brake pedal on the right for these extra brakes as the pedal already there operated the right-hand brake on the differential shaft. The I-12 was virtually the same as the Fairway-12 (on rubber tyres, the default for the Fairway-12 was steel wheels, except the I-12 did not have a governor but just a foot accelerator
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