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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Batteries for a 1850

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K. W. Greenwood

08-08-2005 22:38:26




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Hello all
I have an 1850 diesel (Perkins engine) that needs new batteries. It currently has two 6 volt batteries and I was wondering if I could hook up two 12 volt batteries. Is it called in series? Are 6 volt batteries cheaper or basically the same price as 12 volt? I've never priced 6 volt batteries before but I find it hard to believe they are cheaper. I live in Iowa so the winters get pretty cold but I rarely start it in the dead of winter. What say you?

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John T

08-09-2005 06:29:19




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 Re: Batteries for a 1850 in reply to K. W. Greenwood, 08-08-2005 22:38:26  
KW, it has two 6 volt batteries connected in series which makes it the 12 volts. Its done that way to provide more stored energy than a smaller single 12 volt battery could provide. Basicaly, the more lead and acid and plates you have, the more stored energy and cranking capacity and the combination of the two batterys usually has more then only a single battery.

Sooooo oooo if you wanna use two 12 volt batteries simply wire them in paralell, meaning the + of one to + of other and - to - (side thats grounded to frame assuming youre at - ground???? are you??). I would use 00 Gauge battery and ground and splice/tie cables if I were wiring it.

Caution, a single light rated wimpy low CCA or low Amp/hr 12 volt battery would not store as much energy as two heavy rated 6 volt units, so you have to compare apples to apples here. Just because youre at 12 volts using just one battery doesnt mean she has as much cranking power as the two sixes in series. Therefore, if youre gonna use two 12 volt batteries wired in paralell, I would still buy the absolute highest rated most CCA or Amp/hr rated batterys you can physically fit into the battery boxes. I think that would be in like the 1000 to 1250 or more CCA rated types depending on their physical size I WOULD NOT BUY the light duty 500 to 600 CCA units.

Dont get cornfused on the charge system wiring, the + of both batterys (they are tied together) wires to the same place the outermost untied + of the two 6 volters wired, and the two - posts (also tied together) is frame ground assuming your at negative ground.

John T Nordhoff in Indiana, retired electrical engineer.

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TP from Central PA

08-09-2005 07:49:28




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 Re: Batteries for a 1850 in reply to John T, 08-09-2005 06:29:19  
Considered putting two 12's in my in parallel, but after talking with my battery supplier, which said the same thing as you have, I had him get me the ones he thought would work the best.

Two 1000 CCA(At 0) 6 volts like it came with and I could be any more happy with that choice!



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John T

08-09-2005 13:04:48




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 Re: Batteries for a 1850 in reply to TP from Central PA, 08-09-2005 07:49:28  
Yep, it all boils down to maximizing ENERGY STORAGE regardless which combination (two 6's or two 12's) yields it. THe more lead n acid n plates (usually corresponds to the most weight) the more energy storage. Trouble is comparing apples n oranges. One needs the amp/hour ratings NOT the CCA. The available cranking amps would ADD with two batterys in paralell but thats not true in series. One combination may provide more instantaneous cranking amps, but it wouldnt crank near as long as another. The stored battery energy gets expended in volts x amps over time.

Fun topic for us sparkies lol

John T

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J. Schwiebert

08-09-2005 18:12:16




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 Re: Batteries for a 1850 in reply to John T, 08-09-2005 13:04:48  
John : I did not see your e-mail when I just looked. Someone asked you on the one form about positive and negative ground systems. In 1964 a little before the Oliver 50 series tractors were introduced a service bulletin was sent out to notify the dealer organization the new tractors would have alternators and they would be negative ground. The reason given, it was at the request of the goverment. I want to say the FCC but don't quote me on that. Anyhow the goverment's reason was that the negative ground provided less radio interference for something. I am going by memory now. Questions?

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John T

08-10-2005 05:53:41




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 Re: Batteries for a 1850 in reply to J. Schwiebert, 08-09-2005 18:12:16  
Wow, thanks for the input and I never heard that one before. I guess I will have to add it to the things I heard about less corrosion on frame member connections and ignition point life and the plug polarity?? I never took the time to do any research on the subject and the things above are only what Ive heard or read somewhere over the years.

Take care, John T [email protected]



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K.W. Greenwood

08-11-2005 17:58:14




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 Re: Batteries for a 1850 in reply to John T, 08-10-2005 05:53:41  
MY brother had to start the tractor yesterday and thinks only one of the batteries is dead. He had to charge them before the tractor would start. But, they are both over 5 years old which means they are both due to be replaced. We don't use the tractor a lot and rarely in the winter. I think I'll just keep them at 6 volts.

I looked back in the archives and 3 years ago I posed this same question. It turned out to be a bad starter solinoid then. If I can make the batteries last until the winter then take them out. I'll start over with new ones in the spring. I greatly appreciate your input. Thank you. kwg

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