Generator Light
Generator Light
Hello,
I just rebuilt my starter generator. I also installed a new battery. I made sure the new battery had a full charge before using it to clear snow today.
Tractor worked great for about 5 minutes, then the generator light came on when I increased the rpm’s because of heavy snow. The light remained on when the rpm’s were lowered.
I’ve found some good info from Eugen on testing the regulator that I will follow.
Should I have polarized the regulator/generator after the rebuild? I read somewhere that it wasn’t necessary, but this light has me thinking that it might be.
I would appreciate any thoughts you might have.
Thank you
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I just rebuilt my starter generator. I also installed a new battery. I made sure the new battery had a full charge before using it to clear snow today.
Tractor worked great for about 5 minutes, then the generator light came on when I increased the rpm’s because of heavy snow. The light remained on when the rpm’s were lowered.
I’ve found some good info from Eugen on testing the regulator that I will follow.
Should I have polarized the regulator/generator after the rebuild? I read somewhere that it wasn’t necessary, but this light has me thinking that it might be.
I would appreciate any thoughts you might have.
Thank you
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- Harry
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Re: Generator Light
Findwaldo, yes with a starter generator you do not need to polarize. I found my generator light was coming on and staying on no matter what rpm. So I purchased a new regulator and it still came on. So I installed a ammeter and it reads charge when the engine is running. I have no idea why the light always came on. Harry
1973 444, 1974 644, 1976 446, 1977 646, 1986 226
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Re: Generator Light
You don't say what model year GT you have but on the later 3 digit models there is a voltage sensor (C30265) that is known to fail over time. When this happens the light will remain on even though the GT is charging OK.
Re: Generator Light
That would have been helpful, sorry all.
This is a 1975ish 444
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This is a 1975ish 444
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- DavidBarkey
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Re: Generator Light
@findwaldo Welcome to the site . Check where the bracket fastens to the block for good clean ground . Check the with a meter at the battery to verify low voltage . If after following Eugens test you still have low output pull the S/G and check the brushes . I had one that drove me nuts after rebuilding . Finally found one of the new brushes , the braided wire was loose in the carbon block . Manufacturers defect .
Dave
Mad Tractor Builder
Mad Tractor Builder
Re: Generator Light
I charged the battery back up with an external charger. Started it up and the light went out. Used the tractor for about 5 minutes and the light came on. With the tractor running, I tested the voltage at the battery and it was indeed low (12.4). Then I put the positive probe on the "A" terminal of the generator to see if it was put volts out and if it was I was going to suspect the regulator. However I only got 1-2 volts, so if my workflow is correct, I believe I have a problem with the generator...
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- Eugen
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Re: Generator Light
hey @findwaldo welcome to the site!
not sure I can help, but let us know what troubleshooting you do and what you notice and I'm sure the problem will be fixed.
not sure I can help, but let us know what troubleshooting you do and what you notice and I'm sure the problem will be fixed.
Case 224, 444, 644, 680E
Kubota B26
Kubota B26
- DavidBarkey
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Re: Generator Light
Were you getting power to the "F" field terminal ?? If not go to regulator , if yes go to generator .findwaldo wrote: ↑Mon Jan 29, 2024 4:00 pm I charged the battery back up with an external charger. Started it up and the light went out. Used the tractor for about 5 minutes and the light came on. With the tractor running, I tested the voltage at the battery and it was indeed low (12.4). Then I put the positive probe on the "A" terminal of the generator to see if it was put volts out and if it was I was going to suspect the regulator. However I only got 1-2 volts, so if my workflow is correct, I believe I have a problem with the generator...
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Edit .. After rereading this I realized I did not explain myself properly . "power" should have been ground and when I check it I put + of meter to "A" terminal and - of meter to to "F" terminal . It is a quick check . Bobs diag. tree is the correct way to do it .
Last edited by DavidBarkey on Tue Jan 30, 2024 7:00 am, edited 1 time in total.
Dave
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- propane1
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Re: Generator Light
Just a guess here. But can the regulator cover be taken off. Maybe clean the points in the regulator. Some had an adjustment for voltage settings.
Noel
Noel