N Board Forum - Expanded Thread Page

Subject: Generator again, JMOR please your help

[Back] [Return to Top of Forum]

Patricio    Posted 10-02-2020 at 16:35:00 [URL] [DELETE]        [Reply] [Email]  
  • Generator again, JMOR please your help
  • As you may remember I bought a voltage regulator for a B type generator. At the beginning the VR worked well and I sent you my appreciation for your help. Now I need your help again. The VR charges perfectly well for 1 or 2 minutes after being polarized, then it stops charging. If I re polarize it sometimes charges again. I also short circuited the Bat and arm post and it charges again, but always for a short time. I cleaned the VR contacts it responds but again the same behaviour. what can I do to repair it or do I have to request for refund?

    Tim Daley(MI)    Posted 10-02-2020 at 18:59:21 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Generator again, JMOR please your help
  • Not JMOR here, but first, I don't keep score on who had what so a refresher is required on what you setup consists of. You say 'VR' so we can surmise it is an 8N, right? You don't need to keep polarizing the generator, once is OK if the all the wiring is correct, so that isn't your problem. Are you polarizing the VR with power? Yes? Wrong! You have something else seriously not right. Tell us what generator you are working with. OEM FORD 3-Wire/3-Brush, 11.5 AMP 'A' Circuit or the 3-Wire/2-Brush, 20 AMP "B" Circuit unit. You say you have a 'B' Circuit unit. Well if you are polarizing by arc-spacing the AWM and BAT terminals on the VR then you are doing it wrong. If you are jumpering the ARM to BAT
    and you have a "B" Circuit unit, you are dong it wrong. Also, you need to ensure you are using a belt tensioner device on the generator. Finally,



    -Diagrams courtesy of JMOR

    Tim Daley(MI)

    Patricio    Posted 10-02-2020 at 19:43:38 [URL] [DELETE]        [Reply] [Email]  
  • Generator again, JMOR please your help
  • Thanks Tim for your answer. Here is summary of my former conversations.
    I have 3 8Ns already restored. I converted the three of them from 6 V generators into a 12V system. In one of them I replaced the generator with a 12 v alternator. In relation to the other two, I made the conversion recoiling their fields. I wired them as a B type generator. One of them is running the right way. As it is very difficult to get VRs here in Chile, JMOR recommended me to buy in the US a C0NF10505A VR. I bought it and followed all recommendations JMOR gave me for the installation and polarization. At the first time the VR worked properly, about 10-20 amps, but after 1 or 2 minutes it stopped charging. That's why I started to make several safe connections to try to solve this weird behaviour of the VR.
    I hope this clarifies your doubts.

    Tim Daley(MI)    Posted 10-03-2020 at 05:56:36 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Generator again, JMOR please your help
  • Front Mount distributor or angle mount? We would have to know how the rest of your systems are wired. Something isn't adding up and I suspect it's the wiring but won't guess or go further until you sketch us an exact diagram. If indeed your generator is a 'B' Circuit type, then as I said, polarizing the BAT and ARM terminals on the VR will fry it. That method is used only on the 'A' circuits as shown in the diagrams JMOR supplied. "...I converted the three of them from 6 V generators into a 12V system. In one of them I replaced the generator with a 12 v alternator..." So, you made a few 12V generators or you converted them all to 12V systems using a 12V battery alternator or just one on 12V and an alternator? Which one are you talking about with your current problems? You could have made them all 12V/NEG GRN w/ALT and not hassle with converting generator to 12V and do away with the gennys and the VR's completely. They're your tractors and your time and money and you can do anything you want to them, but I'm just advising to convert to a true 12V system, eschew the gen's and VR's altogether and not have to ever muck with a VR again. Have you a copy of 'WIRING PICTOGRAMS by JMOR' from our HOW-TO's/Electrical?



    FRONT MT 12V:


    *PICTOGRAM courtesy of JMOR


    Tim Daley(MI)

    Patricio    Posted 10-03-2020 at 13:22:48 [URL] [DELETE]        [Reply] [Email]  
  • Re: Generator again, JMOR please your help
  • Tim, many thanks for your interest in trying to solve my problem, but it seems that I did not explain clearly my question. For your understanding I restored the 3 tractors by myself, starting that 30 years ago. I completed the restoration of all of them around 15 years ago. The problem started when the old voltage regulator of one of my tractors failed and I needed to replace it. As in Chile, where I live, it is impossible to buy a VR in the local market, I asked for help. JMOR recommended me to buy a C0NF10505A what I did. I connected it in the proper way, polarized it connecting the Battery and Field cables before connecting them to the VR with the system energized. After that, the gen started charging about 10-15 amp for one or 2 minutes and then it stopped to charge. After that I tried many things to have the generator char ging continuously. The VR always had the same weird behaviour. In summary what I need to know is why the new VR is working that way and if I can repair it or replace it. Following your recommendation,I checked continuity and insulation of all the cables running between generator and VR. Btw, the generator passed the motorizing test.

    JMOR    Posted 10-03-2020 at 23:35:54 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Generator again, JMOR please your help
  • IF your ammeter is wired correctly, where one terminal ONLY connects to battery and the other has all other loads & gen/VR output, then I suggest that it may be working just fine. Why? Because energy is drawn from battery during starting & is replenished during first few minutes of running & after that almost no current goes into or is removed from battery, thus a virtual ZERO reading on ammeter. What is voltage across battery terminals both when you see a charge and when you don', say after 5 minutes of no charge.?

    Patricio    Posted 10-04-2020 at 08:02:01 [URL] [DELETE]        [Reply] [Email]  
  • Re: Generator again, JMOR please your help
  • Hi JMOR, I understand what you say. I thought that this was the reason, also, I hooked up my Sears Engine Analyzer turned the lights on and the Amps or the Voltage did not go up. Then I turned the engine off and let the lights on for 10 min. After that I started the engine and the generator did not generate at all. I think I got a defective VR. I'll buy another one. The faster way to buy spare parts, from Chile, is Steiner Tractor Parts. would you recommend it? Many thanks for your help.

    Patricio    Posted 10-04-2020 at 12:43:40 [URL] [DELETE]        [Reply] [Email]  
  • Re: Generator again, JMOR please your help
  • Many thanks, JMOR

    JMOR    Posted 10-04-2020 at 12:24:46 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Generator again, JMOR please your help
  • heard of them many times, but never done business with them myself.

    [Back] [Return to Top of Forum]