Posted by Melvin Ware on May 02, 2009 at 11:53:42 from (4.152.108.198):
I recently acquired a 1951 Farmall M with 12 volt electrical system (negative ground) on which the generator has never worked. I finally found some time to troubleshoot the problem and traced out all wiring which looks to be correct. However, I have no voltage to the field terminal of the generator. Examining the voltage regulator internally, I find the "F" terminal which feeds the field terminal on the generator actually connects to ground - either through a contact or through a resistor internal to the regulator. No way this can supply the necessary field voltage to the generator! So I'm wondering if someone has either put the wrong type generator or the wrong type voltage regulator on this tractor? Any suggestions on how to best correct this would be much appreciated. Also, does anyone know if this tractor originally had a 6 volt system?
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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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