voltage regulator

Can anyone reccommend a GOOD voltage regulator for 6 volt positive ground tractors? I have bought several new ones for about 35 to 40 dollars and they are all junk. Work for 2 weeks and quit. I have spent considerable money in shipping and having them tweaked and that doesn't work either. Thanks, Ellis

How old is your battery?
I've had a 6 volt Positive ground regulator on my Farmall H for six years and never a problem. Do you just have a cut out relay or a voltage regulator? Either one Make sure the regulator box is well grounded to the frame, make sure your generator and bracket are grounded to the frame good. What little you have described it sure sounds like a loose connection or bad ground to me. Make sure your battery is hooked for positive ground if you're buying the regulators for positive ground. I could suggest more options but I don't have enough information on your tractor yet.

John,-- New or rebuilt everything, wiring harness,tested generator, grounds all perfect and ammeter wired correctly. Voltage regulators say 6 volt + ground. Tests always indicate bad voltage regulator. Thanks, Ellis

I gave up after 3 new regulators and put a alternator on.

I know what I would do. Test the field current draw. You didn't say what model tractor you have but I am going to assume it is an older one like farmall h or m or something like that. The old generators that used a high low charge switch had a much lower resistance field coil windings and would draw about 4 amps on a bench test with 6 volts. That is too much for the voltage regulator points to handle and they arc and burn. Two and half amps would be closer to what a voltage regulator can handle. I actually hate 3 brush generators but one has to use what he is handed. A good shunt wound generator,(two brush) causes much less regulator problems. IH finally went to using them for the last new replacement generators on the 350, 450 etc and which early models were still six volts. Much better, but the correct non adjustable 3 brush generator , made for a tractor with a regulator will work. I fought them for many years as most customers insisted it always worked before, why not now. Well, today's regulators are not the same so it only gets worse. One other thing about adjustable 3rd brush generators, when you adjust them to produce more amps that also increases voltage to field which in turn puts more amps through fields. I have see more than one actually melt the wires off the field coil because a guy put that brush so close to the main brush trying to carry more lights when he had a high low charge switch.

You might try a VR from Jim at Agri Services in New York

http://www.wiringharnesses.com/

Tell him John T says howdy

For best reusults Id use a VR that is suitable for your Ground i.e. one labeled Pos or Neg Ground. In the old Delco glory days they matched the VR better to a specific Genny, I suspect nowadays they only make a few all purpose garden variety trying to make them work on many different Gennys and they may not be rated to handle the correct current as well???????

The VR needs a good clean frame ground ya know

John T

Ive also seen "dudes" set the third brush as close as it physically fits to increase field current buttttttttttttt Ive seen Delco data that says no closer then 1 1/2 (or 2 1/2 on some) commutator segments is as close as they should be used........

John T

What is the Delco Remy # on the gen the three brush gen takes a different reg than the two brush. You need to make sure your reg matches the Delco Remy gen# Some parts books are incorrect thats why you need the gen# hard to know if the gen is original or what is now there

Sounds familiar. I bought about 4 before I got one to work for a length of time. I had the generator rebuilt and could have gotten the regulator from him but didn't. I since have wondered if I would have lasted longer. I will never know.

I bought mine at the farm store each time. No shipping but longevity suffers.

This is interesting. I learn something on here every day!
Most of my experience is with AC. They went from a three brush generator with a hi/lo switch, to a two brush generator with a voltage regulator (DR).
Recently helping a neighbor with his MF 65 we discovered it came from the factory with a three brush generator, with a voltage regulator! Why would they do that?

Ellis; give me an E-mail please.

(quoted from post at 21:07:39 12/05/12) You might try a VR from Jim at Agri Services in New York http://www.wiringharnesses.com/

Click to expand...

Right on that John! "Made in India (or China)" VR's for my Super H and Minnie Mo U were failing after only a few hours of use. But since replacing them with "made in USA" regulators from Agri Services I've not had any problems.

They cost about $30 than the cheapie VR's, but are well worth it. (I am in no way associated with Agri Systems - just a satisfied customer....)

The link will take you to a rebuilder that replaces the mechanical voltage and cutout operations of a VR to solid state. Worth a call! Jim
One source I would give business to

(quoted from post at 23:34:50 12/05/12) The link will take you to a rebuilder that replaces the mechanical voltage and cutout operations of a VR to solid state. Worth a call! Jim
One source I would give business to

Click to expand...

ES SIR!

No John theY have the correct ones ya just dont get them from TSC and places like that. I found that out many yrs ago. My Car Quest dealer has the listings. and he will ask questions like what is the gen #. He says they are built rite here in Albia,IA I had a B that had a non original reg gave him the Delco # got the rite one and it worked like it was supposed to. Owner didnt want an original so we made what he had work with the correct one. Too many parts books have been changed over the yrs with errors. Ex starters for the A and B Farmall are different than the SA,C,SC and up but some parts books say they are all the same.