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Checking a Voltage Regulator

super99

super99

Well-known Member
Can you check a regulator to see if it?s any good off of the tractor? It looks rough, didn?t know if I could clean the contacts and check it or not. What do you do to check it? Thanks, Chris
cvphoto8825.jpg


cvphoto8826.jpg
 
Buy a new one....

Even if you can successfully clean the contacts, both the cutout relay cut-in and VR relay voltage calibration voltages are gonna be way off. Further it likely will have issues with erratic internal grounding which brings another set of frustrations (good internal grounding a key to proper VR operation)

A new VR will be money well-spent!
 
From my days in automotive classes in high school (early 60's) I think it takes a lot of knowledge and skill to troubleshoot and repair these units, which I was never able to even think about doing. The suggestion to buy a new one is probably sound advice, but from what you read in these YT pages, you might get something that doesn't work as well as the old one.
 
its not looking good. but to satisfy your curiosity swap it with one on a working tractor. then you know the rest of the story.
 
As a past used tractor dealer, electrical engineer and farmer who has seen a ton of VR's the ONLY way I would test that one is throw it away and buy a new one. Problem is finding a quality unit that correctly matches your Generator grrrrrrrrrrr. Of course you can find long winded detailed complex Delco literature to "troubleshoot" if that's your preference, I wouldn't try to describe it for you over the net, it gets real technical yet doable if you have the proper equipment, maybe someone can provide the URL link, I have them hidden somewhere in the bowels of this computer lol

John T
 
Put it back at the bottom of the pond. A clean regulator with need of adjustment can be dealt with, Old Motors manuals (libraries here are closed) from about 1955, will have information to do proper adjustment on a usable regulator. Jim
one found
 
Email me. I have a few old Autolite and Delco service manuals I can send you. Can't attach pdfs here. Stuff I came across during web searches and downloaded. Anybody else who wants them let me know. One on Delco starters too.
 
Jim,
I have those two but how did you place that link? I've wanted to post pdfs but never could figure out how on here. I have a bunch of stuff on dropbox but the uploads are very slow. Converting them to jpegs leaves a fuzzy image.
 
FWIW, I wouldn't assume the new regulator is correctly set either. I made that mistake with a regulator sourced from this site (for a non-green tractor) and it cost me a battery to learn my mistake.

"Trust but verify"
 

Those are links to the website where the pdfs are, not the pdfs themselves. Like you I have copies of the pdfs but can't post them. I wish pdfs could be posted but wonder if there are copyright concerns?
 

Be prepared to pay about 3x what they used to cost for a good one. Last good one I got was over $75, and worth it.
 
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