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John Deere Tractors Discussion Forum

12 volts or 24 volts

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Author  [Modern View]

10-09-2012 20:02:45

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John Deere 4230 diesel,has 2 12 volt batteries,should they be hooked up paralel or in series,if series is everything 24 volts or just the starter? Thanks, DON

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10-10-2012 16:00:25

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 Re: 12 volts or 24 volts in reply to donol60, 10-09-2012 20:02:45  
Thank you for the information, DON

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Tim S

10-10-2012 04:15:54

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 Re: 12 volts or 24 volts in reply to donol60, 10-09-2012 20:02:45  
As Cliff stated all 30's were 12 volt if 2 12's hook them in parallel,positive to positive,,if it has 2 6 volt's hook them series ,...about once a year I get one in here that is hooked up 24 volt, they spin "way" to good, and the head lights blow out. This usually happens when they have 2 6's in them,,the customer goes to the Napa store with the bad battery's and asks for 2 new ones,,the long haired counter guy with 5 ear rings gives him 2 "12 volt's" ( they look the same)and the customer goes home and puts them back in the way he took them out,,not realizing he just set it up for 24 volts .

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Tx Jim

10-10-2012 03:33:55

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 Re: 12 volts or 24 volts in reply to F-I-T, 10-09-2012 20:02:45  
JD diesel RC tractors changed to 12V in '69. General rule is if the tractor has an alternator it is 12 volts but there were a few exceptions in the older cab/ac equipped tractors.

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Cliff Nelson

10-09-2012 20:05:34

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 Re: 12 volts or 24 volts in reply to donol60, 10-09-2012 20:02:45  
Hook them in parallel. All 30 series and newer are 12 volt.

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