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Ford 9N, 2N & 8N Discussion Forum
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Goofy Generator/Regulator Wiring and Re-Polarizing

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Jim47

05-16-2008 16:59:35




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First of all, thanks to those who responded to my post about how to up-load photos. Let"s see if I can follow instructions!

Here is my problem.

After 7 years of happily running on negative ground, the battery in my 48N (176632)died. So before installing the new one, it"s time to deal with re-polarizing, which I have been putting off for some time because my generator/regulator wiring set-up looks like nothing I can fine in any of the manuals that I have.

I have (hopefully) attached two pictures. The first is a photo of my generator. Terminals F and A are insulated terminals. F appears to be in the vicinity of one generator brush, so I have assumed that this is the Field terminal but I don"t know. If this is the case A must be the armature terminal, I guess. G is clearly a ground since it is a non-insulated screw in the generator case. F is wired to "Field" on my regulator, A is wired to "Armature", and G is wired to ground on a regulator-mounting bolt.

First question: am I wired OK?

Second question: how do I polarize? My manual says to jump regulator "Bat" to regulator "Gen". I don"t have a "Gen" terminal on my regulator.

Help please!

Jim47

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Tom 43

05-17-2008 04:39:00




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 Re: Goofy Generator/Regulator Wiring and Re-Polarizing in reply to Jim47, 05-16-2008 16:59:35  
Dear Jim,
The procedure for for polarizing a generator is the same whetherthe circuit is A or B. With the tractor not running momentarily jumper between the BAT and ARM or GEN terminals. Remember, ARM and GEN are diferent labels for the same terminal. A spark is normal and desirable.



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soundguy

05-16-2008 22:34:35




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 Re: Goofy Generator/Regulator Wiring and Re-Polarizing in reply to Jim47, 05-16-2008 16:59:35  
I agree with bob.. don't muck with it unless you know if it is a circuit.. or b circuit.

you can check this by checking the field coil wireing in the genny.. or by peaking at the back of the reg.. if it has visible bias resistors ont he bottom, check to see if there is a single resistor from ground to field.. if so, it is an A circuit unit. If there is a bias resistor from ARM to field, then it is a B circuit reg. ( B circuit regs may ALSO have a 2nd bias resistor hooked up.. )

A circuit.. polarize by jumping BAT/ARM

B circuit.. polarize by jumping BAt/FLD

Me? .. I'd let sleeping dogs lie and hook old battery up just like new one.. and heck.. even check to see if old battery wasn't charged backwards too!

soundguy

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JMOR

05-16-2008 19:54:11




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 Re: Goofy Generator/Regulator Wiring and Re-Polarizing in reply to GB in MT., 05-16-2008 16:59:35  

Jim47 said: (quoted from post at 19:59:35 05/16/08) First of all, thanks to those who responded to my post about how to up-load photos. Let"s see if I can follow instructions!

Here is my problem.

After 7 years of happily running on negative ground, the battery in my 48N (176632)died. So before installing the new one, it"s time to deal with re-polarizing, which I have been putting off for some time because my generator/regulator wiring set-up looks like nothing I can fine in any of the manuals that I have.

I have (hopefully) attached two pictures. The first is a photo of my generator. Terminals F and A are insulated terminals. F appears to be in the vicinity of one generator brush, so I have assumed that this is the Field terminal but I don"t know. If this is the case A must be the armature terminal, I guess. G is clearly a ground since it is a non-insulated screw in the generator case. F is wired to "Field" on my regulator, A is wired to "Armature", and G is wired to ground on a regulator-mounting bolt.

First question: am I wired OK?

Second question: how do I polarize? My manual says to jump regulator "Bat" to regulator "Gen". I don"t have a "Gen" terminal on my regulator.

Help please!

Jim47
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Pay attention to Bob. If it were mine, been working fine for 7 years as Neg Gnd, I would put it back exactly as it was in a heartbeat & keep on tractorin.

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Dean

05-16-2008 17:39:44




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 Re: Goofy Generator/Regulator Wiring and Re-Polarizing in reply to Jim47, 05-16-2008 16:59:35  
Jim:

"GEN" and "ARM" are used interchangeably in polarization instructions.

Polarize by momentarily shorting the "BAT" terminal to the "ARM" terminal in your drawing.

Dean



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Bob

05-16-2008 19:09:59




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 CAREFULL!!!!!!! in reply to Dean, 05-16-2008 17:39:44  
CAREFULL!

That is s "NON OEM" generator, and COULD be a "B" circuit unit, which requires an ENTIRELY DIFFERENT polarizing procedure!!!! Using the wrong procedure will "let the smoke out" of the regulator and/or generator.

If you are not SURE as to what you have, and it has been working satisfatorly (-) ground, I'd leave well enough alone!

After all, the generator is NOT "correct", so why does the polarity have to be "correct"? (The ignition system will effectively be a little "hotter" with the correct polarity, but apparently it has been satisfactory as-is?)

If you still want to muck with it, are there any labels and part numbers on the regualtor?

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