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D14 Charging Problem

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04-09-2005 11:51:34

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My 1958 D-14 (6V) will not charge...most of the time. Everything was fine and one day she just stopped charging. I had the generator rebuilt, put it back on and it was charging. Shut the engine off and then started it up ten minutes later and it was no longer charging. I replaced the regulator and starter selenoid, started her up and she was charging fine, but once she warmed up...stopped charging with only a hint of a charge from time to time on the needle. Maybe the generator fails when hot? I have a new wiring harness, but haven"t put it on yet and my guess is that is not the problem, but....I would appreciate some thoughts and comments! Thanks, Mark

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04-09-2005 16:10:00

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 Re: D14 Charging Problem in reply to MarksD14, 04-09-2005 11:51:34  
Did you polarize the generator when you put it on? You mention having a new wiring harness available- did you buy it suspecting a broken wire in the charging circuit? Is the battery staying charged up? Perhaps it's indicating a charge after startup, recharging what it took to get it going, and needs very little to feed the ignition system after that. If you turn the lights on, does the gauge needle move?

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04-09-2005 18:38:31

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 Re: D14 Charging Problem in reply to JMS/MN, 04-09-2005 16:10:00  
Yes, I polarized the generator. I bought the new harness because I was running out of ideas and while is seems to be okay, it is almost 50 years old. Before I had the problem the gauge always read about 6 volts and then read zero for quite some time (would go negative when I would start it), but finally drained the battery enough to where she wouldn't start. Thats when I had the generator rebuilt. Can't test the lights as I haven't found the right bulbs for the stock housing except for one fella that wanted $50 each. The standard TSC bulbs are too small. Thanks for the interest. Any thoughts?

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04-09-2005 20:40:18

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 Re: D14 Charging Problem in reply to MarksD14, 04-09-2005 18:38:31  
bad ground on the voltage regulator is a common problem. clean the bolts and holes where it attaches to the tractor.--- another trick is to put a jumper wire from the "F" terminal of the generator and ground it to the tractor frame at a bare spot. If the generator starts charging, the voltage regulator has some burnt contacts, or not good ground.

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