8N discharging battery

[JerryLook]

1950 8N with a front mount distributor. It has a pretty good power draw when the tractor is off. It will kill the battery in about 2 days. When you hook up a new battery or jump it the generator spins. I’m assuming there should be a diode or something to keep this from happening?

The tractor shows its charging when it’s running. This still has the original 6vdc, positive ground setup. I’d like to fix the issue before buying a new battery.

I’m wondering if it is a bad diode if I can replace that without replacing the whole generator

Thanks

 

[wore out]

1950 8N with a front mount distributor. It has a pretty good power draw when the tractor is off. It will kill the battery in about 2 days. When you hook up a new battery or jump it the generator spins. I’m assuming there should be a diode or something to keep this from happening?

The tractor shows its charging when it’s running. This still has the original 6vdc, positive ground setup. I’d like to fix the issue before buying a new battery.

I’m wondering if it is a bad diode if I can replace that without replacing the whole generator

Thanks

NO diode involved in the OEM generator systems. Instead, there's a "voltage regulator with an electro-mechanical "cutout relay" inside. Most likely it's points are stuck/welded closed

A common cause of this is if the battery was ever connected backwards and the engine was then started.

 

[JerryLook]

That’s good news then. The voltage regulator is only $35 from this site. Cheaper than a new generator for sure. Thank you

I know the previous owner of the tractor. I bet he hooked up the battery backwards at some point. He was telling me today that he had a 12 volt battery in it for a while.

 

[JMOR]

That’s good news then. The voltage regulator is only $35 from this site. Cheaper than a new generator for sure. Thank you

I know the previous owner of the tractor. I bet he hooked up the battery backwards at some point. He was telling me today that he had a 12 volt battery in it for a while.

12v on 6v regulator was enough to kill it, most surely if connected Neg ground.