I will add the other aspect to short life of a voltage regulator. Now days, one generator fits all or nearly all of the old farmall tractors when in reality the ones that came from factory with a high low charge switch had an entierly different current flow through the field coils than the models that came with voltage regulator. I have been cussing rebuilt generators since their inception as they don't match the original equipment. I used to always use genuine delco remy parts to repair generators is at all possible. If a generator came into the shop that was a rebuilt unit, then I normally just sold another rebuilt one as you could not match parts to fit a good share of the time. Wrong field coils, armature turned down to nothing, shafts cut for undersize bushing, wrong brushs etc. Way too much current flowing through most of the voltage regulator vibrating contacts to sustain clean contact surfaces for long. Once I had a new 706 that was eating up voltage regulators, and this was back when they made good 3 unit regulator, the voltage out put was eratic which of course could not be detected very well by the owner as it had an idiot lamp, no ammeter. I took generator apart and found that the current flow through field coils matched a 6 volt generator , all other parts were correct. Replaced field coils, problem solved.
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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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