Actually Im NOT surprised so many non electrical persons are concerned about it. It just seems sensible and intuitive to many a lay person that if you reverse polarity on that DC motor it should turn the opposite direction ALTHOUGH WE (many of us at least) KNOW ITS NOT TRUE ON OUR TYPICAL TRACTOR STARTER MOTORS. Hey, I remember wayyyyyyyyyyy back when I was a young green kid thinking the same until my Grandfather n Uncles set me straight lol That same uncle also gave me an education on single phase split phase AC motors and what direction they turned or could be easily made to turn. He had one he had disabled the start up winding on and turned it on and it, of course, just sat there n hummed and DID NOT TURN soooooooo he takes his hand n gives the pulley a good spin in a direction n sure enought it took off n ran in the direciton he started it I WAS AMAZED. Manyyyyyyy years later after graduating in EE and starting to work for Century Electric Motor Company I still never (and to this day many years after his death) forgot that although I now understood it..
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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