Normal charging voltage

[FarmerBlair]

Hi, just a quick question. What is the voltage you should find at the battery with the tractor running if the 6 volt generator is working properly? I've searched here and found different answers from 6.5 to 7.2 to 7.5 volts.
On my 881 I was getting 6.3 volts, then after polarizing, it went up to 6.7 volts.
Thank you.

 

[DGinVT]

On my 8N I get about 7.2 to 7.4 volts.

 

[Bern]

You're looking for roughly half of a 12V system charging voltage, which is in the low 14s. So, you'd ideally be in the low 7s.

 

[FarmerBlair]

Thanks Bern and DG

 

[David G]

I think that is low, would want to see in the low 7s.

 

[souNdguy]

agreed. I'd want to see 7.2 ish..

 

[FarmerBlair]

Thanks Soundguy and David. I'll have the generator checked out a the local shop.

 

[sotxbill]

any thing at 6.5 or higher is charging... However you need a bulk charge to make the battery last longer.... But to see that voltage the engine must be at a higher speed for the generator to put out enough, and if the battery is in bad shape or have a shorted cell, you may not see the correct voltage. If battery is low, running at high speed, you should see the voltage slowly rise as the battery takes on a charge. And if the battery is good, and charging system good, then it will slowly go to 7.1 volts give a take a little bit. Not uncommon to see from 6.9 to 7.5 volts due to regulator calibration and temperature.

A badly sulfated battery will charge up voltage wise but still have no capacity to put out high current. shorted battery will never charge up correctly.

 

[Hobo,NC]

(quoted from post at 00:15:23 09/08/15) Hi, just a quick question. What is the voltage you should find at the battery with the tractor running if the 6 volt generator is working properly? I've searched here and found different answers from 6.5 to 7.2 to 7.5 volts.
On my 881 I was getting 6.3 volts, then after polarizing, it went up to 6.7 volts.
Thank you.

Also confirm the belt is in good condition and tight...

 

[FarmerBlair]

Thanks Hobo and Sotxbill. I had a new battery installed and engine running around 800 rpm when checking the voltage. Belt was fine. Hopefully it is not a voltage regulator problem since access to it is next to impossible with the wagner loader attached!