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JD H electrical help

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Phil

12-19-2002 14:38:28




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Just put lights and new switch on my41 h when I pull the swicth to the first notch the amp meter bounces back and forth on the - discharge side and it also does this when the pull the switch all the way out I have looked for shorts and my wire diagram looks to be good any suggestions
thanks phil




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Alvin

12-20-2002 13:55:41




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 Re: JD H electrical help in reply to Phil, 12-19-2002 14:38:28  
Phil; If you do a search back through the archives you will find some very good generator and charging system trouble shooting posts that Clooney has written covering the early b. The early b is almost the same as your h. I had a problem with my b a few months ago and he talked me through a full charging sistem test that got me up and going in easy to understand words. I printed it out and took it out to the barn with me then followed it step by step. Mine turned out to be broken wire.

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Phil

12-20-2002 17:26:23




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 Re: Re: JD H electrical help in reply to Alvin, 12-20-2002 13:55:41  

Thanks to all THe H is up and charging It was at the generatar I took i completely out cleaned the connections checked the brushes and made sure it was grouded good and the belt was tight took right off Had a hay ride tonite 30 degrees 25 mph winds and snow and a metal seat guess what froze Thanks again
Phil



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John T

12-20-2002 17:41:11




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 Re: Re: Re: JD H electrical help in reply to Phil, 12-20-2002 17:26:23  
Good Going, one of the most common problems I used to find were corroded or stuck brush hold down spring assemblys which didnt let the brushes be held tight against the commutator and a little air pressure and WD 40 often got em charging again. John T



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John T

12-20-2002 07:23:45




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 Re: JD H electrical help in reply to Phil, 12-19-2002 14:38:28  
Phil, did it charge okay BEFORE you installed the new light switch?? If it did but doesnt now, try removing the light switch (assuming its the corect JD switch) and wire brushing the areas it mounts into the dash to insure its well grounded. If its a light switch thats supposed to provide a ground for the generators field circuit (not just turn lights on only) it has to have a good ground PLUS have the field wire from the generator connected to its correct terminal. What it does is ground the generators field circuit through a resistor on that switch when the lights are not on (low charge)and dead ground it (high charge) when lights are on. If you can connect the field post down there on the generator to ground and then she charges okay, the generator is okay, but theres either an ungrounded switch or its not getting connected to the field circuit. Did you use the correct JD swith (they have a terminal for field) or some sort of auto store replacement?? Be sure you have the right switch with a field terminal and its well grounded or let me know if you have a full fledged Voltage Regulaotr (3 or 4 wire) because they do not use the light switch ground, they ground the field internally. If it just has the small 2 wire cutout relay on the generator, the field has to get a ground somewhere, which is usually via the correct light switch. I have a long winded test I can post to determine if its a bad VR or Generator, but try groundign the field first and insure you have the corrct welll grounded switch, and post back. You might try cleaning the brush hold down spring assemblys to insure tight brush to commutator contact and be sure the generator is well grounded and the belt is tight also. Good Luck, Ol John T Nordhoff.

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Clooney

12-19-2002 16:18:01




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 Re: JD H electrical help in reply to Phil, 12-19-2002 14:38:28  
Phil, it sounds like the generator isn't putting out enough to keep up with the lights. If you have the 3 brush generator move the 3rd brush [in the direction of armature rotation] to increase output & see if that helps. ~Do you have a cut-out relay system or a converted regulator system? If a cut-out system make sure the light switch is grounding the [F] post on the generator with the lights on. If not, you won't get full generator output. Make sure the light switch is grounded & there is a wire from the light switch [fld] control terminal to the [F] post on the generator. Try grounding the [F] post on the generator with the engine at fast idle & the lights on, [if the problem goes away you have light switch to generator [F] post wire problems, or no light switch ground, or improper switch hook up]...
~If you have a regulator system [more than 2 terminals on the regulator & a square cover], post back for regulator related problems on the "H"..... ..

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