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Ford 9N, 2N & 8N Discussion Forum
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Re: Charge rate

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pierce

09-15-2013 13:04:09
75.101.82.47



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everything your alternator/generator can output. at least 20-30A assuming sufficient engine RPM.




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Royse

09-15-2013 16:44:08
69.36.58.178



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 Re: Charge rate in reply to pierce, 09-15-2013 13:04:09  
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Hang on a minute.

He said it was 6V so not an alternator unless it was a specially built one.

That said, not going to get more than ~20 amps out of an 8N generator.

Those generators were pretty noisy as electricity goes, so digital meters
don't like them much. Far better off with an analog when it's running.

If the ammeter goes from zero when off, to charging when running, it
may be working just fine, or it may need an adjustment. But it is charging.

Does the charge rate change with RPM?

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Ken B 8N NC

09-15-2013 17:47:46
98.26.201.209



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 Re: Charge rate in reply to Royse, 09-15-2013 16:44:08  
Gen does not have an adj. screw. With the battery that low I would expect the amp meter to show more of a charge than 3 or 4 amps. With an analog meter it does show an increase in voltage. It has never kept the battery charged very good. The charge rate varies very little with an increase in RPM. Like I said, I have another gen that I put on and nothing changes.



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Royse

09-15-2013 18:22:08
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 Re: Charge rate in reply to Ken B 8N NC, 09-15-2013 17:47:46  
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Normally I would expect it to charge more too. But, with two
different generators, both charging, both using the same VReg?

You say it has never charged the battery very well. Same battery?

Not long ago I had one that would not register a charge at all on

the ammeter and it was because the battery was bad.

I thought it would be trying to charge to beat the band, but

it didn't read a measurement on the ammeter at all.

Car parts place will test the battery for free if you don't have

a hydrometer and/or load tester at home.

Sure, it could be the VReg. I don't think so since it is charging,

but it is possible. If it is, the replacement VRegs are junk.

Make sure you get one with a "no questions asked" return policy,

or consider converting to a 12 volt system.

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Ken B 8N NC

09-16-2013 05:06:30
98.26.201.209



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 Re: Charge rate in reply to Royse, 09-15-2013 18:22:08  
2 different generators, same voltage regulator.In the 10+ years since I rebuilt the 8N I have replaced the battery 4 times. This battery is only 2 years old. The 8N does not get used a lot, but it should be enough to keep the battery charged if it was working right. Saturday I charged the battery to about a 25% charge, enough to start the tractor, and ran the 8N for about 2 hours at 3/4 throttle disking a field. I then connected the battery charger back and the charge % had hardly changed. I left the charger connected and the battery had charged to 50% when I stopped it, so the battery will take a charge.

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Ken B 8N NC

09-15-2013 14:47:40
98.26.201.209



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 Re: Charge rate in reply to pierce, 09-15-2013 13:04:09  
I put another generator on it and I get the same results. Does that mean the voltage regulator might be bad? Are you say that the gen should run at almost max output until the battery gets charged up?



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pierce

09-15-2013 15:52:50
75.101.82.47



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 Re: Charge rate in reply to Ken B 8N NC, 09-15-2013 14:47:40  
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me, I would take a digital volt meter and read the battery voltage before you start the tractor, and again when its running at elevated idle. should be about .6-1V difference in the two readings if the VR is working right.



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