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Discussion Forum

Generators ?

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06-26-2002 18:18:25

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On an old 1958 d-17. Can a guy test to see it the generator is working simply buy unhooking the battery while the tractor is running? I am triing to trace down a problem in the electrical system.
Should the tractor stay running with the battery disconected?

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06-26-2002 18:54:06

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 Re: generators ? in reply to John, 06-26-2002 18:18:25  
John, there are two terminals on the generator "A" and "F". The F terminal is grounded thru the voltage regulator and the A terminal goes to the ampmeter and battery, after going thru the regulator. A quick test is to "ground" the "F" terminal and measure the voltage between the "A" and "F" terminals. should be regulating somwhere about 13.5-14 volts. IF it dont, take the "A" terminal and remove the regulator wire and connect a jumper from "A" to the battery terminal. Start tractor and measure the voltage again, if it works now, then the regulator was bad. If it still dont work, rebuild generator. Brushes and armature get dirty, crusted and will not make good contact. Might do it your self.

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06-26-2002 20:19:31

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 Re: Re: generators ? in reply to steve, 06-26-2002 18:54:06  
thanks for the advice.
I have a new regulator and just had the generator rebuilt today. the amp gage doesn't show anything.
I don't have the tester you are talking about. Could the amp gage be bad? Is there another way to test the generator?

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06-26-2002 20:36:51

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 Re: Re: Re: generators ? in reply to John, 06-26-2002 20:19:31  
ground the "F" terminal. Run the "A" to the amp meter, then to the battery. start and see what happens on the gauge. hard to believe the amp meter is bad, suspect a generator problem, or bad wire. is the voltage regulator grounded good?. try a good jumper to ground to the regulator base.

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06-26-2002 21:34:41

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 Re: Re: Re: Re: generators ? in reply to steve, 06-26-2002 20:36:51  
Is this a 6 volt sys? Less voltage output than above?

Did the generator get excited properly? Polarized is the word I should say? I forget which wire to touch to the other on a new rebuild sometimes...


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