Troubleshooting a Delco Generator and Voltage Regulator on John Deere 2 Cylinder
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- čas přidán 22. 08. 2024
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A brief overview of how an old school generator and voltage regulator work on a John Deere 2 cylinder. Basic principles apply to just about any old vehicle/ equipment with a generator.
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The clearest explanation yet that I've found on CZcams, 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!
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.
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 the generator is suppose to work.
thank you
Nice little instructional video. I learned something today.
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.
right we are more or less saying the same thing
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!
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. 😊
The best video on generators !!!!!!!!!!!!!!!!!
Very good!
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.
Thanks for that
You are mostly correct.
First thing I would recommend is to switch this to a (-) negative ground set up.
Definitely NOT. This is a petrol engine and is running an IGNITION COIL. Coils are usually wound for +ve earth. When you change over to -ve earth you will need a coil that is wound to use with battery at negative earth.Yes you can just swap the wires over in an emergency, but battery, coil and associated wiring must all be in line to get smooth engine running. This man was also talking about A or B generators. A has an externally earthed field that is earthed in the regulator and B has an internally earthed field that is earthed to the yoke of the generator itself. 😊
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?
Did you trim down the armature insulation down some (special tool,) when you machined it?
(You probably did- just saying.)
Will this work for a 2 cylinder diesel tractor with a 6 volt system?
As far as general troubleshooting goes yes they’re all the same
Got a jd 50 with 12v positive ground. How hard is it to switch it over to negative ground?
You should just have to repolarize the generator and flip the wires to the coil. You will have to flip the wires on your ammeter as well or it will read backwards.
Did you try adjusting the points from the back?
No i didnt
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?
Did you polarize it?
@@ScrappyIndustries Yes touched jumper from armature to battery connector on voltage regulator and got a spark. This with ignition off.
@@ScrappyIndustries ok found problem. Took regulator, generator back to shop for testing. When putting on generator my 7/16th wrench was missing, and had to use a cresent which didn't allow me to reach top nut that well. In the process I twisted the post. He is repairing the generator now. Went and got a new set of wrenches today. Stupid me. Be careful with the wiring post people. Hold it tight with bottom nut, and correct wrench.
Good advice! I am glad you got it working again
That two relay regulator does not have a current limiter. The reverse current cutout closes with enough generator voltage and opens when current back flows from the battery to the generator. It looks like the contacts are dirty. There should be continuity to ground at the field terminal. It was intermittent as you bumped the contacts.
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?
You need some shop manuals not the internet 🇺🇸
Then why are you here?
You just popped up and I decided to watch is all . Real shop manuals are full of all kinds of information and theory . Wasn't making fun of you , trying to help you with knowledge .