Posted by pgo12 on September 03, 2009 at 02:28:29 from (72.241.1.142):
In Reply to: O-12 vs I-12 posted by WHISKEY BENT on September 02, 2009 at 18:54:57:
all the w12 series tractors have the serial number under the gas tank on the rear support. the block number will match the serial number. block number is on a flat spot left of fuel pump. made from 1934-1938. os 1054 is a 1934. very early ones have a dipstick to check oil. [gas model only], otherwise 2 test cocks on oil pan.. ..o12s [early] had hand brakes, one for each side, like an f12,one drum on each side of trans with the bands in drum, and a foot clutch........modified o12s[citrus package, all the extra sheetmetal] had foot brakes, [2 pedals]pads in a drum, one on each side of trans,with a over center [hand] clutch......... i12 would have foot brakes,[one pedal], with the brake bands inside rear hubs with foot pedal clutch.... o12 has a standard drawbar. i12s would have a pintle hitch..... early o12s would have the 9 inch cast hubs,[front,pneumatic] like the i12. later o12s had 16 inch round spokes in front[f&H],other rims optional. i12 had the 9 inch cast hubs,[front],some for solid tires, some pneumatic, later other front rims were optional.... o12s had a govenor [like f12s] all through production, but around 2000 rpms. very few i12 [real early] had no govenor, around serial number 581 ,i12s had a "handy" govenor on carb, around 2600 rpms.... both had higher trans gearing than the w12. around 9-10 mph.. early o12s would have a bucket type seat. later a pan seat that flipped up. same with the i12. both had solid cast rear rims..some i12s came with no fenders or modified in some way for a specific use. pg
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