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John Deere Tractors Discussion Forum
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3020 battery charger hookup

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Ken M

12-08-2007 14:53:45




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I recently got a 3020 Diesel 24 volt tractor. My question is, how do I connect a charger. If I hook up to one battery pos to pos and neg to neg does it charge the other battery correctly or backwards when using a 12 volt charger. Do I need to disconnect and charge one at a time? I'm not much for electricty.




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John T

12-08-2007 15:34:32




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 Re: 3020 battery charger hookup in reply to Ken M, 12-08-2007 14:53:45  
NO, you dont need to disconnect them to charge either one of them one at a time.....

YES, if you have a 12 volt charger, you have to charge them one at a time, + Charger to + of Battery and - of Charger to - of Battery.... then you charge the other battery

If you had a 24 volt charger like the 24 volt generator on the tractor, then you could charge them both at once in series.

One of the batteries has its - tied to frame ground and the other has its + tied to frame ground which is how the lights are still 12 volts, some on one battery + ground and others on the other battery - ground buttttt ttt the 2 outermost untied battery posts (+ on one battery -on other) is how the series 24 votls is derived for the 2 wire frame ground isolated devices like the staretr n charging system.

get it????? ??

John T

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55 50

12-10-2007 08:15:48




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 Re: 3020 battery charger hookup in reply to John T, 12-08-2007 15:34:32  
John, I'm gonna tease a little here. In the last sentence how about "frame-ground-isolated devices"? (add the dashes?) I had to slow my reading speed down a bit there to see what you were saying, lol. Thanks for your always great inputs. Another retired EE. Ron



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Ken M

12-09-2007 10:20:33




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 Re: 3020 battery charger hookup in reply to John T, 12-08-2007 15:34:32  
Thanks John. I appreciate the information that you always give.



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buickanddeere

12-09-2007 10:44:40




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 Re: 3020 battery charger hookup in reply to Ken M, 12-09-2007 10:20:33  
Is the right side battery going dead?



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