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<div dir="ltr" data-setdir="false">Spoken like an Engineer. "It takes one to know one" :-}<br></div><div><br></div>
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On Saturday, August 8, 2020, 11:46:31 AM CDT, Jim Becker <mr.jebecker@gmail.com> wrote:
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<div><div dir="ltr">Don't believe everything you see on youtube either. Right off the top, one <br clear="none">of her tests is to unhook the battery on a running engine. It is dangerous <br clear="none">and proves nothing that can't be easily tested otherwise. I warned the <br clear="none">publisher about this before the book was published, but they didn't fix it. <br clear="none">To get the same information: stick a voltmeter on the battery and see what <br clear="none">the reading is not running. Start the engine and check again. If the <br clear="none">reading increases, it is charging. If it remains the same or goes down, it <br clear="none">isn't charging.<br clear="none"><br clear="none">The 17 volt reading and sudden change in charging both suggest a sticky <br clear="none">voltage regulator contact inside the regulator. This is the one normally <br clear="none">closed when the engine is off. You could try cleaning the contact (kraft <br clear="none">paper of file, no abrasive board or paper). Make sure the regulator is well <br clear="none">grounded.<br clear="none"><br clear="none">One comment on volt meters, the cheap digital meters are susceptible to <br clear="none">electrical noise, which old tractor ignition and charging systems produce <br clear="none">much of. You can get wrong or random, rapidly changing readings. You need <br clear="none">to either use a high quality digital meter or an analog. Cheap analog <br clear="none">meters generally tolerate the noise and work OK.<br clear="none"><br clear="none">Jim Becker<br clear="none"><br clear="none">-----Original Message----- <br clear="none">From: <a shape="rect" href="mailto:szabelski@wildblue.net" rel="nofollow" target="_blank">szabelski@wildblue.net</a><br clear="none">Sent: Friday, August 07, 2020 3:23 PM<br clear="none">To: Antique Tractor Email Discussion Group<br clear="none">Subject: Re: [AT] Generator operation<br clear="none"><br clear="none">Brad,<br clear="none"><br clear="none">Hopefully this helps you to check out the regulator:<br clear="none"><br clear="none"><a shape="rect" href="https://www.youtube.com/watch?v=II-6nOw28J8" rel="nofollow" target="_blank">https://www.youtube.com/watch?v=II-6nOw28J8</a><br clear="none"><br clear="none">The young lady in the video is very knowledgable about Farmall tractors, she’s <br clear="none">done several books on them.<br clear="none"><br clear="none">To me it sounds like the regulator is cutting out to soon. When the battery <br clear="none">is charged, the one coil (assuming you have the older type with coils) that <br clear="none">feeds the battery for charging will open and the current draw for the <br clear="none">battery goes to zero instantly. That’s because it is either open or closed, <br clear="none">no in between. The newer electronic regulators can allow the battery charge <br clear="none">to slowly drop, or go to a trickle charge state, once the battery is charged <br clear="none">or nearly charged.<br clear="none"><br clear="none">17V out of the generator seems a little high to me. Usually you should only <br clear="none">see 14V - 15V. You only need to apply a charge of about 2V more than the <br clear="none">battery rating in order to charge the battery. At 17V you could be causing <br clear="none">the one coil to drop out early before the battery starts to charge. You may <br clear="none">want to see if you can find the specs for the tractor and verify that you <br clear="none">have the right generator with the correct size pulley. The engine speed and <br clear="none">the ratio of pulley sizes between the two determines how fast the generator <br clear="none">spins. If it spins too slow, low output voltage. If it spins too fast, high <br clear="none">output voltage.<br clear="none"><br clear="none">Carl<br clear="none">----- Original Message -----<br clear="none">From: Gunnells, Brad R <<a shape="rect" href="mailto:brad-gunnells@uiowa.edu" rel="nofollow" target="_blank">brad-gunnells@uiowa.edu</a>><br clear="none">To: Antique Tractor Email Discussion Group <<a shape="rect" href="mailto:at@lists.antique-tractor.com" rel="nofollow" target="_blank">at@lists.antique-tractor.com</a>><br clear="none">Sent: Thu, 06 Aug 2020 23:31:34 -0400 (EDT)<br clear="none">Subject: [AT] Generator operation<br clear="none"><br clear="none">Ok, see if I can help get this back on tractors.....<br clear="none"><br clear="none">Dad has a very nicely restored Ferguson TO-35 that has a 12v generator with <br clear="none">external regulator. I'm going to drive it this weekend with him (he's <br clear="none">driving a Farmall 656) on a tractor ride. He mentioned a while back that it <br clear="none">wasn't charging. So I went over and looked at it tonight.<br clear="none"><br clear="none">I picked up some testing procedures from Yesterday's Tractor site and a few <br clear="none">others. To make a long story short, I took a jumper wire and connected it to <br clear="none">the mounting bolt on the regulator to the field connection on the regulator. <br clear="none">It excited things and the amp gauge showed a charge. I had my volt meter <br clear="none">(cheap Harbor Freight unit) on and it appeared to run up to nearly 17 volts <br clear="none">before the regulator kicked out. We fiddled with things a while (put a load <br clear="none">tester to draw battery down, etc) and while it will show a charge it makes <br clear="none">me think the regulator may be suspect. It shows a 10 amp + charge when <br clear="none">running at higher RPMs and then it suddenly drops to 0. I'm used to an <br clear="none">alternator where the charge rate drops gradually to zero. Is this how <br clear="none">external regulators typically run or is the regulator not working as <br clear="none">intended? Good news is the generator is working so that's a plus.<br clear="none"><br clear="none">Thanks for any insight from those of you who've worked with these before.<br clear="none"><br clear="none">Brad<br clear="none"><br clear="none">_______________________________________________<br clear="none">AT mailing list<br clear="none"><a shape="rect" href="mailto:AT@lists.antique-tractor.com" rel="nofollow" target="_blank">AT@lists.antique-tractor.com</a><br clear="none"><a shape="rect" href="http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com " rel="nofollow" target="_blank" fg_scanned="1">http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com </a><div class="ydp671c3881yqt8620807996" id="ydp671c3881yqtfd78767"><br clear="none"><br clear="none">_______________________________________________<br clear="none">AT mailing list<br clear="none"><a shape="rect" href="mailto:AT@lists.antique-tractor.com" rel="nofollow" target="_blank">AT@lists.antique-tractor.com</a><br clear="none"><a shape="rect" href="http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com" rel="nofollow" target="_blank" fg_scanned="1">http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com</a><br clear="none"></div></div></div>
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