Posted by bill engel on November 05, 2012 at 16:41:41 from (174.59.75.166):
I have a M farmall which I converted to 12 volt several years ago. It has the delco alternator, a 6 volt coil, and a ballast resistor..and has been working fine all along. Today, I started the tractor, warmed it up, and ran up the throttle til the ammeter went into charge mode. I turned on the headlights, just to see if they still worked. They did, but then i noticed the ammeter pegged all the way to the right, and the engine stopped running. I have no spark coming out of the coil. The headlights still work. I do have proper continuity throughout the circuit. The resistance across the ballast resistor is 0.00. According to the spec, it should be around 1.5 ohm. Did I perhaps fry the resistor, and or the coil? Thinking about bypassing the resistor, and installing a 12 v coil. Any advice, I would greatly appreciate.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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