Re: farmall A generator putting out 13.7V + ground

Posted by Bob M on June 29, 2009 at 19:27:31 from (74.74.133.11):

In Reply to: farmall A generator putting out 13.7V + ground posted by major257 on June 29, 2009 at 18:33:07:

Matt - Most likely replacing the 6 volt regulator will have your tractor charging again.

Reason: If the "burned out" regulator has failed open on in cutout circuit (a common VR failure) the generator is now operating open circuited. And open-circuited, a healthy 6 volt generator can develop 12+ volts at idle and 20 - 25 volts at governed RPM.

You might try this: With a known good battery connected and and the engine operating at governed RPM temporarily jumper the GEN and BAT terminals at the VR. If the ammeter shows a strong charge (10 - 15 amps) when the terminals are jumpered a new VR will solve your problem.

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