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Farmall Tractors Discussion Board |
Re: Re: Alternator Conversion Wiring Diagram
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Posted by Bob M on January 27, 2000 at 10:15:56 from (192.232.120.194):
In Reply to: Re: Alternator Conversion Wiring Diagram posted by MrGadget on January 27, 2000 at 07:58:14:
MrG - The Delco alternator (at least the 10 SI) only needs battery voltage applied to the #1 terminal until it's spinning fast enough to generate electricity. After it gets going it taps excitation current from it's own internal circuitry. So it will indeed work without a batter. However... Alternator manuals specifically warn to NOT disconect the battery from an alternator-equipped engine while it's running. Reason is the battery acts kinda like a "ballast" for the electrical system, keeping system voltages from changing too rapidly for the regulator to control. This happened to me: Pulled the battery from an older alternator-equipped Chrysler product - motor was idling and the lights were on. There was an arc at the battery neg post as the cable came off, followed by a brilliant flash as all 4 headlights burned out, then the motor quit. Apparently the alternator developed a voltage surge as regulator tried to compensate for the loss in battery voltage. It was sufficient to destroy every lit lamp in the vehicle. Plus both the alternator and the regulator got fried. A spectacular, but costly lesson...
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