I put a brand new 6 volt, positive ground, one wire alternator on my 720D with a pony motor. After I get the tractor running, I see no output 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, I see 6 volts, so I know the alternator is connected to the battery good. When the tractor is running full throttle, I put a volt meter on the battery and I still see 6 volts, and not 7 or 8 like I would expect , so I know it is not charging.
My question is , do those alternators need to be at a certain rpm before they start charging?
My question is , do those alternators need to be at a certain rpm before they start charging?