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Discussion Forum
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Re: WD 12 volt conversion

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Gordon in IN

06-04-2002 21:23:37




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Have been running a WC with 12 volt battery and lights and the original (6 volt) generator and original (6 volt) starter since the early 1970's. No change to wiring harness is required. Just add a resistor in the line TO the "field" of the generator to get 13.8 to 14.2 volts at the battery when running at full engine RPM. The dual charging rate/light swith even works as intended. If you do not add a resistor, the charging voltage will be much too high and you will "cook" the battery or "fry" the generator or both. I like to use a "standard" or low to medium amp rated battery to prevent the starter from being too agressive. A really high amp 12 volt battery did not hurt the starter when I first converted the tractor to 12 volt, but it did destroy the starter drive bendix spring (My WC has high compression over bore piston/sleeve set in it - standard bore with standard compression should be more "forgiving".) My WD has a 12 volt GM (Delco) alternator with an internal regulator wired the same way it was in the cheverolet it came from. Try to get the lowest amprage alternator you can. You do not need very much charging amprage on a WD tractor. High amprage alternators can cause belt slipping or wear out the belt quickly. I like to use a "extra service" or "severe service" fan (V) belt (like the V belts used on riding lawn mowers.) The fan belt is no "fun" to replace on these tractors. Have fun, Gordon in IN

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