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8N Voltage Regulator Theory of Operation?

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Danti - CO

05-25-1999 11:07:40




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Does anyone have a technical description or the theory of operation for the 8N mechanical voltage regulator?

I remember technical descriptions for these mechanical regulators from books when I was a kid but modern technology cometh and old technology goes away.

Thanks.....




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Since no body else has...bg

05-25-1999 18:33:11




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 Re: 8N Voltage Regulator Theory of Operation? in reply to Danti - CO, 05-25-1999 11:07:40  
I'll take a stab at it. Not specifically about the 8N regulator, but regulators in general...
There are points in the regulator, hooked up to electromagnets. One set of points keeps the voltage from going too high, the other limits the current. When the current or voltage goes too high the points are opened by th electromagnets, which kills the field current so the generator goes "dead." When it goes "dead" the magnets are de-energized and the points close, so the generator charges again. Another unit acts as a cutout, so the battery won't drain back through the generator when the engines is off or the generator charge rate is too low to chage the battery. When the generator voltage rises to where the battery is fully charged, the regulator prevents it from overcharging the battery. The regulator also regulates the current(amperage)so you won't burn up the generator, which will put out more current the faster it turns. Cutout circuits are usually set about 1 volt above normal battery voltage.
Some folks can adjust voltage regulators, but it's usually easier and better to replace them. A good ground is essential for optimum VR operation.
I'm sure llamas and Dell and some of the other guys who are more into the electric stuff could pick this explanation apart, but it's only an general overview.

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Steve Scheer

10-24-2001 09:10:55




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 Re: Re: 8N Voltage Regulator Theory of Operation? in reply to Since no body else has...bg, 05-25-1999 18:33:11  
I have a Ford 8n tractor prior to serial #263844 with front mount distributor. From pictures I've seen on other websites, the Ford 8N voltage regulators 8N 10505B & 8N 10505C look the same. Do you know what the differences are between the 2? Is it correct that the B is for the Ford 8N with the front mount distributor & the C is for the Ford 8N with the side mount distributor? Do you know which tractor the 8N 10505A is for? Please reply by email as I am finding deciding which one to order very difficult.

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Nolan

05-26-1999 05:24:03




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 Re: Re: 8N Voltage Regulator Theory of Operation? in reply to Since no body else has...bg, 05-25-1999 18:33:11  
I'll also add that it's my understanding (and observation) that the points do not spend their time clacking open and closed, but rather float in a state of balanced limbo.

Public libraries almost always have the large Chilton manuals for older vehicles. Those manuals contain good pictures and explanations of basic generator regulator operation and theory.



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bg

05-26-1999 15:35:08




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 Re: Re: Re: 8N Voltage Regulator Theory of Operation? in reply to Nolan, 05-26-1999 05:24:03  
That's right. They sort of vibrate and can be adjusted(on some VR's) down to close voltage tolerances.



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