JD B Generator Regulator

I have a 1951 JD B Ser.# 201,000 and up.
The generator Delco Remy Mod# 1100506.
The generator was rebuilt 10 years ago and now the regulator is bad again. About every two years the Reg. quits working.
The OEM set up lasted for 20 of the 30 years I've owned this tractor. The tractor has a Mag. set up. I only need the generator to charge the Bat. after started and Run the lights at night.
I found the first owner had change the polarity of the system, From a Pos. Gnd. to a Neg. Gnd. the reason was because he was pulling a 12 V. Neg. Gnd. engine baler. As I do the same and had no problems until now. I don't have the OEM. regulator.
I found out that there were 3 types made. (1) /P, (2) /N, (3) N/P. These were inked stamped or written on the bottom of the Reg. I was told the N/P had ( Dissimilar metals on the upper and lower contacts) So It could be used on a Pos. or Neg. Gnd.
System. The others don't and are specific to polarity.

Does anyone have a good part # or a suggestion of what can be done?? So I can keep it A Neg. Gnd. Sys. I would like to keep it Orig. As Poss.

This tractor has been used every year to Plow, Cultivate, Seeding, and baling. 50 Acres For 30 Years.
Thanks,
MDFJ

Call Agriservices at 716-937-6618 and ask for Jim. He will know which regulator you need. He will also likely have it in stock.

MDFJ,My Delco books show generator 1100506 is the original OEM Delco 6 volt Pos ground generator.The matching Delco regulator is a 1118305 or 18305 6 volt Pos ground.

Does anyone have a good part # or a suggestion of what can be done?? So I can keep it A Neg. Gnd. Sys. I would like to keep it Orig. As Poss.The tractor was originally Positive ground.

The baler polarity that was pulled should have nothing to do with the tractor polarity unless it has lights on it that ran off of the tractor or something.

I would go to Car Quest with that Delco # as their regs are USA made and work lite dont car which polarity is used but regs sure do.

Thank You All,
I have been A Heavy Gen./Refer/ Diesel Mech. For 37 Years.
I know if a 12 V. Neg. Gnd. Baler is hooked to the hitch of the tractor, And the tractor is Pos. Gnd. And left over night you will have a problem.
I Understand Elect., Hyd, Refer, Etc. I know that dissimilar metals,Are like a wood on wood drawer slide. They have to be different.Pine/Oak, Maple/pine,etc. Or they wear out and fall apart. My Father is a Master carpenter (85 Years,Still has all 10 fingers). I learned allot from him, It's just dumb things like this that can stump a person! Especially when the parts today. That are not made in U.S. Or Not made to Specs. Like they were before!

I will check out all of your suggestions!!
Thank You All Again!!
MDFJ

I kinda half a$$ see what you are referring to, so I have one other question? Does the 6 V steal from the 12 V trying to equalize the voltage between the two in this configuration ??

(quoted from post at 10:11:21 04/04/16) I kinda half a$$ see what you are referring to, so I have one other question? Does the 6 V steal from the 12 V trying to equalize the voltage between the two in this configuration ??

Click to expand...

If they are hitched together and the tractor and baler
are shut down.
The tractor is a 6 V. Pos. Gnd. The regulator contacts will remain closed on the tractor regulator and drain the battery.Most engine balers have a solid state Reg. The isolation diode in the Reg. will protect the 12 V. Neg. Gnd. side from draining.
The 12 V. Neg. Gnd. will keep the 6 V. Pos. Gnd. Reg. contacts closed Thus draining the 6 V. tractor battery.
When both are running they fight each other again (Under and Over charging)
Hope this helps,
MDFJ.

Okay I get that with the positive/ negative. Seems like their would be a (Under and Over charging) problem either way they are hooked, depending on witch one was trying to charge their respective battery. 6V would put a small charge to the 12V and the 12V would put a high charge to the 6V when it is running. :? :? I guess the solid state regulator would protect the 12V, but what happens when the 6V regulator is closed and the 12V begins to charge ??

1) It back feeds double the voltage through the 6 V. side.
2) It burns the vibrating contacts and the Reg. shunt. (Over time)
3) It can change the Gen. Polarity and burn the fields.
It all depends on what type of Reg. is in use.
I have a 2 coil, some are a 3 Coil voltage Regulators.
I've repaired,rebuilt a few generators using the right tools (Growler, Commutator Lathe Etc.)
The post I started with was my dumb luck.
In the years most Manufactures were all making N/P Reg. for these kinda problems.
JD B-W I use only has to charge the Battery after starting and when the field lights are on. The engine runs off a Magneto.
If you are using a distributor and coil set up you will encounter other issues.
Hope it helps,
Thanks,
MDFJ