Posted by chas036 on September 02, 2016 at 13:06:03 from (108.183.59.33):
I just put a brand new 6 volt, positive ground, one wire alternator on my John Deere 720D with a pony motor. After I get the tractor running, I see no charge coming from the alternator to the battery. I know the amp meter is good, because I see it go to minus amps when I run the pony motor.
When I put a volt meter on the terminal of the alternator before I start the tractor, I see 6 volts, so I know the alternator to battery connection is good.
When the tractor is running full throttle (800 rpm) , I put a volt meter on the battery and I still see only 6 volts, and not 7 or 8 like I would expect , so this indicates it is not charging.
My question is , do these type of 6 volt one wire alternators need to be at a certain rpm before they start charging?
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