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farmall m 421 01-16-2013 07:35:59 68.171.231.83 Report to Moderator	Guess I'm asking the difference, if any, between a 51 and a 53? Gonna be a puller. No belly pump, no live pump, no belt pully, no pto, no air cleaner, etc, etc. Any difference in rear end, clutch housing, frame rails, front end? Difference in brakes would be less than 50 lb? [Reply]   [No Email]
ss409 01-16-2013 08:38:01 72.53.194.237 Report to Moderator	some differences in the rear end is, on the M, the bull pinion shafts use heavier brg cages, vs the super m using a flat plate. the bull pinions are heavier in the super m, longer n bigger diameter. transmission shafts,, maybe larger diameter in sm. the crankshafts in the older ms werea small journal, vs the sm-450 larger journal crank, but dont know if they weigh the same or not, maybe 3-5lbs heavier? flywheel n clutch can possibly weigh differently between M and SM. Old Ms used a pressed steel gas tank mount vs a cast iron mount. could also be a slight difference in the radiator weight in late super ms. Bolsters, in stage 2 mite have the same upper bolster style as the 400-450 and there a good difference there. yours being a 53, it should have the same as a M. im sure there is alot more changes n weight differences in alot more parts, these are some that comes to mind. hope this helps.   [Reply]  [No Email]