Later ones: 1) Keyed shut-off 2) redesigned block and pistons--start better in cold weather 3) 12 system w alternator 4)"console" hyd 5) much better SCV's--easier to adjust, rebuild, swap out, etc--this is not a simple "bolt-on" conversion 6)Nicer dash more guages/idiot lights 7)oval miffler, square intake manifold 8) hyd engaging pto 9) Many more parts interchange w 30/40/50/55 series This is just off the top of my head--I'm sure someone else remembers more than me. They are a far nicer tractor. The 1972's have increased value just because they are the last year. Now, if you want to collect one, I'd get a 4000--much rarer
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Today's Featured Article - Experimental Tractors Article - by Danny Bowes (Dsl). Tractor technology appears to have nearly hit it's pinnacle of development. If you agreed with the subtitle, you are rather mistaken. Quite, actually. As a matter of fact, some of the technology experimented with over 40 years ago makes today's tractor technology seem absolutely stale by comparison. Experimentation, from the most complex assembly to the most simple and mundane component, is as an integral a part of any farm tractor's development
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