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Case Tractors Discussion Forum

530 Generator / Regulator issue

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Joe Young

05-06-2006 18:52:36

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The tractor in question is a 1965 541 with a negative ground system. It has a Prestolite generator, which I just had overhauled. The repair shop also sold me a new regulator (at my request) and said they polarized it.

I got the tractor running today for the first time, and the GEN light remains lit at all throttle settings. The tractor does not have a load meter or ammeter.

How should I proceed troubleshooting this one? I am fine with all things mechanical, but must admit, electrical systems and electrical issues are “Greek” to me. Any guidance or suggestions would be greatly appreciated. – Joe

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Tom (Ks)

05-06-2006 20:25:16

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 Re: 530 Generator / Regulator issue in reply to Joe Young, 05-06-2006 18:52:36  
With the enging off, touch a wire from the B terminal (or battery) to the A terminal (GEN). You should see a spark when you do this. This should polarize the generator.

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Phil (Nj,Az, Sask)

05-07-2006 19:11:08

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 Re: 530 Generator / Regulator issue in reply to Tom (Ks), 05-06-2006 20:25:16  
Joe, Make sure you have a good ground from the REg to the mounting bracket and bracket to frame.

Hope this Helps,

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Joe Young

05-07-2006 17:07:25

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 Re: 530 Generator / Regulator issue in reply to Tom (Ks), 05-06-2006 20:25:16  
Thanks for the reply Tom. I will give that a try - Joe

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Mike in MI

05-06-2006 19:22:52

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 Re: 530 Generator / Regulator issue in reply to Joe Young, 05-06-2006 18:52:36  
I have a 530 also 1966 model I remember dad having the generator redone and a new voltage regulator. It has the idiot light on it. Thats what I call it anways.
If I can remeber correctly dad was having the same problem.
I can remember him taking the cover off the regulator. He tryed polarizing it but it didn"t seem to work. He tried to do everything he could think of to get the light to go out. He went to turn the head lights on and that did the trick.
Not sure if this will help your situation but worth a try. I"m sure someone will jump in here and give you some good advice on what to do.
Good luck, Mike

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Joe Young

05-07-2006 17:06:26

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 Re: 530 Generator / Regulator issue in reply to Mike in MI, 05-06-2006 19:22:52  
Thanks for the idea Mike. I turned the lights on several times checking out the electrical system... - Joe

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