I've converted a couple "Letter" series tractors to 12v neg grd by having the generators stepped up to 12v. I also have a SM with a 12v 3 wire alt that was converted to 1 wire and a SMTA that has the 1 wire Delco 1 wire alt. I much prefer the converted generators. I've never had problems with the converted 3 wire but the 1 wire will run the battery down in just a few days unless I unhook the battery cable. The auto parts store where I bought it called Delco & they said that was the nature of the beast. It uses a small amount of voltage to stay "excited" all the time, which runs the battery down.
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Today's Featured Article - It Can't Be Done! - A Tractor Story - by Neil Campbell. I'll never forget the time back when I was a boy baling hay on our Farm in Big Rapid, Michigan. The most memorable event that took place was a trip up the steepest incline on the farm pulling an old New-Idea baler with a pony-motor for power and a haywagon. I had just talked my Dad into buying an old John Deere B with 6-speeds ahead and I was real proud of it, except it was a little smaller than the Case tractor that we normally
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