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Tracy Martin TN 
Orange Level Access
Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 11121
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 Topic: D15 Voltage regulator?
Posted: 19 Oct 2026 at 9:42pm |
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So i took my VR and generator off to carry to the repair shop. The voltage regulator mounting bracket was toast. The rubber shock bars were broken, checked another D15 there same thing. Hoping the repair shop can get new VR like the old ones. Don't know what is available yet. What brand are you running on yours? Thanks, Tracy
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No greater gift than healthy grandkids!
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Phil48ACWC
Silver Level
Joined: 17 Jan 2013
Location: Vermont
Points: 343
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Posted: 20 Oct 2026 at 6:06am |
I converted my WC to 12V Negative Ground with a 10SI Alternator with built in solid state regulator. I got the alternator from a junkyard, took it apart, cleaned it up, swapped the pulley from my old generator, and put new bearings and brushes in it. That was 27 years ago and no regrets. The only things I had to do with it over that time was replace the fan belt and adjust the belt tension. Generators and mechanical voltage regulators were pretty much gone before Elvis died. D&B Electrical has best prices. Click on below:
Or ebay has lots of 10SI alternators. I like the 3 wire units better but they are getting harder to find.
Edited by Phil48ACWC - 20 Oct 2026 at 12:12pm
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PaulB
Orange Level
Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 5474
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Posted: 20 Oct 2026 at 8:10am |
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If you buy from D&B electrical, I hope you get a better product than what I did from them. I got a New starter for my 89 Dodge/Cummings from them thinking an American company would sell quality products. Was I ever wrong, I received a box with a label from a Chinese company. I installed this starter early in June of 2024. this had a one year warranty. Just before July 4th of 2025 the starter was dead. Like something from Henry Ford, it outlasted the warranty, nothing more. The original starter that came on the truck lasted 35 years. After that, I got a Starter from "Mean Green" and so far it has been doing it's job.
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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
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steve(ill)
Orange Level Access
Joined: 11 Sep 2009
Location: illinois
Points: 93413
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Posted: 20 Oct 2026 at 8:25am |
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Im sure every company has an OOOPS now and then.. In general, D&B has a 5 star rating on their sales, quality and warranty claims.. I have bought a couple alternators from them.
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Like them all, but love the "B"s.
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Oldwrench
Bronze Level
Joined: 12 Jan 2020
Location: Northeast
Points: 175
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Posted: 20 Oct 2026 at 8:48am |
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Tracy, you might want to think about a solid state regulator. I went through the usual bunch of cheap overseas conventional regulators failing, then bought a solid state regulator for my D17. It has been on the tractor for over 10 years now, with no problems at all. The solid state regulators aren't common at tractor parts places, but are very easy to find in the classic car world. I stayed with the stock generator for my tractor, instead of going the alternator route. It's a common Delco generator, and finding a matching regulator shouldn't be hard. The only caveat is you have to decide on the polarity you want, and match the regulator to that.
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DSeries4
Orange Level
Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7725
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Posted: Yesterday at 2:32pm |
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My local shop uses Regitar brand voltage regulators. They are one of the few decent brands out there according to them. I have had pretty good luck with them. Sometimes the odd one goes bad after some years.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 11121
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Posted: 20 hours 16 minutes ago at 6:53pm |
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I will see what is available from the genny repair place. They came highly reccomended. Hope to hear from them soon. Thanks, Tracy
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No greater gift than healthy grandkids!
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