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Farmall & IHC Tractors Discussion Forum

Install batteries Farmall 656

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06-30-2020 05:50:11

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This 1965 tractor has missing batteries and I thought I knew enough to replace the batteries. But I blew out one so I ask to get past my ignorance without the manual. This has used two batteries: one at the foot of the operator and the second on its right side. It seems to start with one terminal cable bolted to the tractor frame. I set that one to the negative of a battery at the operator's foot. The positive started from that battery to the second battery's negative terminal. At this junction there where other lead attached going elsewhere. Then to finish, the final positive terminal was attached but shorted out. The way the terminals are laid out it seems that the two batteries are in series. And I perhaps believed wrongly that both were 12v. I've searched for how these batteries should be installed, but my search terms revealed little. So what should my search terms be as to how to replace these batteries?

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07-13-2020 05:22:31

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 Re: Install batteries Farmall 656 in reply to sam452, 06-30-2020 05:50:11  
Thank you all for the advice. Once I get a single battery in place, I'll have to check if it was 24v that blew the battery or if there was a short that I haven't found yet.

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07-06-2020 03:25:41

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 Re: Install batteries Farmall 656 in reply to sam452, 06-30-2020 05:50:11  
No room for anything larger than a Group 24 between your feet and still be able to get the cover back in place. I know some people don't care about that but some do. If you choose to leave the cover off, PLEASE keep track of it and make sure it goes with the tractor. Taking covers and guards off and chucking them in the scrap pile is what makes those guards so hard to find and so expensive later on when someone wants to put the tractor back original.

The upside is modern batteries are much better as far as capacity. Just make sure the charging system is up to snuff.

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06-30-2020 07:03:47

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 Re: Install batteries Farmall 656 in reply to sam452, 06-30-2020 05:50:11  
12 volt system so positive to positive to starter, negative to negative to ground. If using 6 volt batteries, negative on one to ground, positive on that battery to the negative on the second battery. Positive on second battery to starter. Mine has only the one 12 volt on the right side and works just fine. Mine is diesel. Gas should crank easier.

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caterpillar guy

06-30-2020 06:38:12

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 Re: Install batteries Farmall 656 in reply to sam452, 06-30-2020 05:50:11  
6 volt would be negative to ground then positive of other battery to starter the other 2 connected together. This will give 12 volts with them in series. If 12 negative to ground for both batteries and positive to the starter on both. You can either do them separately or pass through the one from the other keeping both negatives and both positves together

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06-30-2020 16:16:31

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 Re: Install batteries Farmall 656 in reply to caterpillar guy, 06-30-2020 06:38:12  
One 12 volt in front of your feet should be all you need. I have had several 656 through 686 tractors and I only used one batter.

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07-05-2020 18:22:04

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 Re: Install batteries Farmall 656 in reply to MikeinKy, 06-30-2020 16:16:31  
Better off with one battery the largest cca you can fit

2 batteries are problematic with double the connections to get all corroded and have issues

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