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Labor Day Putting down your wrenches or time for MORE wrenching? 
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Mod | | | Forums66 Topics128,009 Posts1,055,293 Members48,419 | | Most Online14,466 Apr 26th, 2026 | | AD Chevy Trucks Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Feb 2011 Posts: 583 'Bolter | | 'Bolter Joined: Feb 2011 Posts: 583 | 1939 6 volt, 3 brush generator, voltage regulator. The amp gauge is usually pegged over to the high charge side when running. Exception would be when I turn on the lights. Input from you folks would be helpful.
Rick
1939 Chevrolet Stake Truck
| | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | What's the voltage at the battery posts after running a while? If it's over 7.5, the voltage regulator points are stuck (the coil behind the Field wire) or there'a a grounded spot sonewhere in the field wire between the generator and regulator. It's also possible the battery just has a low state of charge and the generator is trying to recharge it. That would require driving for several hours without running the starter. Charge the battery overnight or longer and see if the problem goes away. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | A 3 brush gen. does not use a voltage reg. 1939 models did not use a 3 brush gen. You may have a mismatch of parts there. George They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | George, some Delco 3 brush setups used a 2-unit regulator- - - -cutout relay and voltage, no current regulator. I've got a Delco service manual from the early 1950's that covers that system and a bunch of others including the heavy duty 6-unit regulators used on the 24 volt military rigs. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | I had never run into that. A guy is never too old to learn. George They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Apr 2022 Posts: 4 Moderated | | Moderated Joined: Apr 2022 Posts: 4 | Jerry:
I would love to converse with you on some generator controller issues. I'm too new here to be able to PM you.
Dave | | |
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