12 volt Generator check

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Old 06-09-05, 03:44 PM
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Question 12 volt Generator check

How do I check a generator to see if it is charging? It is on a 1978 Kubota tractor.
 
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Old 06-09-05, 04:02 PM
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A simple indicator would be to read battery voltage with engine off. Then read battery voltage with engine on, and it should be a higher voltage.
 
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Old 06-10-05, 04:38 PM
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Lugnut,

I know it is not charging, I just don't know if it is the Generator or something else in the charging system.

Thanks,
 
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Old 06-10-05, 06:21 PM
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If not the generator, then it is the regulator (assuming it is not built in to the generator) or the battery itself. To test the regulator I would disconnect it from the system, set up your meter on the battery as Lugnut suggests and -- ** only for a very short time ** -- start the engine and see if you see the voltage rises.

This does not rule out the battery. I suggest you take it out and have someone load test it. Anywhere that sells batteries should be able to do this.
 
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Old 06-10-05, 06:48 PM
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Pardon me, brain fart. If when you remove the regulator the generator charges, then it is the regulator. It would only be the battery if it didn't hold a charge.
 
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