Troubleshooting a Delco Generator and Voltage Regulator on John Deere 2 Cylinder 

The clearest explanation yet that I've found on RU-vid, I've been questioning the polarization method as well as grounding the field directly to force the generator to charge. Seeing it done vs it just being verbalized makes it a lot easier to understand!

This is the best explanation I’ve found! Lots of videos on how to diagnose it without explaining how it even works. I can tell you know your stuff. Thank you so much

you find the most helpful advice in the least expected places. 10/10 explanation!

The information is not 100% accurate, but it's solid enough to show how to get things up and running. Overall, good video.

Good explanation of how system works, but remember if you unhook battery, generator or regulator you will have to polarize the gen and regulator for the system to charge. Very easy to do just search "how to polarize generator and regulator", pleanty of good videos to do it on you tube. Good job on video and explaining how system works.

Good explanation of how the generator is suppose to work.

Nice little instructional video. I learned something today.

The best video on generators !!!!!!!!!!!!!!!!!

Very good!

Thanks for that

Usually called dynamo generator! Generator “Field” wire must be connected to the Right side “FLD” in the voltage regulator. The Armature wire connected to the “ARM” Center terminal of the VRegulator! Voltage regulator MUST BE grounded securely to Complete all the circuit. One of the carbon brush is connected to the ground! “CUT OUT” relay big coil is to strengthen the magnetic pull for forceful contact at high charging current. Voltage regulation happens at the right coil with fine wire. Make sure the contact point is clean and coil is good. Must play with the tension of the spring to regulate the voltage!

You are mostly correct.

The reverse current relay makes sure the battery charging contacts close only when gen volts are greater than battery volts by a few volts. when gen volts are lesser than battery volts, the field of the heavy current coil is bucking the field of the shunt winding under neath the heavy coil and contacts will open. When Gen volts are greater than battery volts, the field of shunt coil (fine wire coil) will add to the field of heavy coil and those contacts will close and the battery will charge.

At 6:00 you show the voltage regulator sitting on the generator, you should not test that way. The regulator needs to be fastened securely. Thanks for the video, I learned a lot.

John deere systems ran into trouble when the regulator is screwed onto a freshly painted generator. There are 3 things that you have to get correct. Before you can polarise your generator field windings you need to know whether the generator has an internally earthed field or an externally earthed field. This has NOTHING to do with whether you are using positive or negative earth. Now to move onto POLARISING the generator. You can use positive or negative earth but the polarity of the generator has to be the same as the battery polarity. If the generator has an externally earthed field then to polarise you tap battery to the dynamo point of the regulator. Even though you are polarising the field DON'T TAP THE FIELD TERMINAL as this puts a dead short across the battery. I always disconnect the 2 wires from the generator and polarise the generator directly. When training I advise learners to do the same. This may sound long winded but there is a lot of theory going on with the windings and correct settings in the regulator Only play with the regulator if you have the CORRECT mechanical and electrical settings. 😊

First thing I would recommend is to switch this to a (-) negative ground set up.

Did you trim down the armature insulation down some (special tool,) when you machined it? (You probably did- just saying.)

Did you try adjusting the points from the back?

Thanks learned a lot. Am T.S a 606 IH. Shop tells me the generator is working, and Voltage regulator bad. Put on a new Voltage regulator, and still no charge. Have checked all the wiring, and looks good. Cleaned out all my connectors with special file tools, electrical spray cleaned, and added dielectric grease tiny dabs to exterior of connectors. Still no charge, and amp light still on. Any suggestions?

Will this work for a 2 cylinder diesel tractor with a 6 volt system?

Got a jd 50 with 12v positive ground. How hard is it to switch it over to negative ground?

What causes a voltage regulator to work for 20 minutes and then discharge. The generator has been rebuilt. Is there something still wrong with it?

You need some shop manuals not the internet 🇺🇸

Sorry, but your video where you're explaining the workings is often off camera and moves around too much. Eg, you're explaining the contacts/ coils, but they are out of shot. You need a stand or someone else holding the camera- as long as they're on to it?