Inside the voltage regulator is the Cut Out Relay. The Cut Out Relay allows voltage to flow to the battery so it can charge, and maybe most importantly, it doesn't allow voltage to flow from the battery back to the generator.
I bought the same regulator for my 1971 international tractor. I called a&I company I got it from for some guidance and information. They didn't have a clue about their product! Thank goodness I ran across this gentleman and his videos. 50 years old systems are not something you would work on everyday. This man is great and I thank him. Rex Dunn
Great series of videos explaining the voltage regulator and cut-out relay! Gave me the knowledge I needed to tune the regulator on my old Jeep - thanks very much!
Very helpful explination of how this works. I'm more used to solid state electronics, so this really helped me troubleshoot a no charging issue on a 1965 humber sceptre.
Thank you very much, I love to see how things work, especially older technologies like this. And in then end when thinking about it compared to the electronic ones using MOSFETs, it looks more reliable cause when MOSFETs are dead they let everything going through like a simple wire 🤔
To put in perspective, that fast flickering is how they discovered they could make a silicon chip which converters AC to DC electric as well, hence a switch mode power supply. Using the high peaks of the AC on that + and - side and cutting out the middle you have changed AC electric into DC electric, it's amazing what they were able to do with mechanical devices like this isn't it?
Very good video the function is well explained. Please bear with me now as I am a complete novice at this and I have a question please! I have a Ferguson TEF20 with a 12v regulator. What is the best way to check that the cut-out relay voltage is set correctly using a voltmeter? Thanks
It's also known as "motoring". If you take off the fanbelt, and put 12v + on the generator, it is basically an electric dc motor. Sure it will work. But when the drive belt is on, it doesn't have the guts to rotate the engine, therefore it all goes up in smoke. I put a massive diode in my dad's bugeye sprite to replace the cut out coil. Once the cover goes back on, who'd know? A LOT safer. Thanks for the videos, I'd forgotten how to set a reg. Do you have any videos on 3 bobbin regulators? I was only an apprentice auto electrician at the time, and i never saw enough old cars to remember how to set these old things up. Cheers !
I was right with you till you said the reason you needed the cut-out to prevent the battery setting fire to the car. While the battery could produce 600A cranking, dynamo would never draw anything like that. At which point the main issue is the battery becoming flat due to discharging through the dynamo. A pain, but not a 600A fire!
Great explanation, thanks but my manual of my sunbeam said glass sanding paper not carbon type.. Im not sure why other than it might hurt the coatings in some way..I think it's good to mention.
I have one question. What stops the generator from over charging the battery? In my opinion 25 amps going to the batgery continuously while running would eventually overcharge the battery right?
Typically the make far less, and the battery will accept the overcharge reasonably well. Alternatively most owners of these cars will turn the dynamos off to prevent excessive charging.
O.K. It did not look like any regulator I ever saw, and thought maybe it was for an alternator. But we want to keep things nifty under the bonnet, time for tea an crumpets.
Think about the perspective of the camera. You too often have the overhead camera pointed to the top of the item rather than the parts of the item you are talking about. I'm sure from the perspective of your eyes it looks great but I found it very frustrating. I find it hard to believe that after one viewing you didn't re-shoot those scenes.
