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Allis Chalmers Discussion Forum
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Which battery for a AC B?

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Brian

07-25-2004 11:43:53




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Hi Folks...a couple of newbie questions for you :)

My great aunt has an AC B sitting in an old shed that looks to me to be in pretty good condition. The serial number indicates that it's a late 1940. I'm playing around with the idea of restoring it. I'm told that some member of the family had the old beast running a couple of years ago so I'm optimistic. I'd like to try to get it fired up to see how good/bad it might be. It has no battery right now. I understand from reading postings here and around the web that this tractor would be a 6 volt, postive ground system. It looks to be all original stuff on it, with the exception of some repaint work, so I assume it hasn't had a 12v conversion done. My question is what kind/size of 6V battery would I need, approximate cost, and can anyone recommend a good source for one?

Thanks in advance...and thanks for all your posts...I'm learning a lot just hanging out here!

Brian

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Steve in N.J.

07-25-2004 20:41:53




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 Re: Which battery for a AC B? in reply to Brian, 07-25-2004 11:43:53  
Brian,
The battery you're looking for is a BCI 701 series 6 volt. Numerous different battery manufacturers sell them. We keep a couple in stock for our local customer's, but you should find one locally. If you do purchase a battery for the tractor, clean all connections at the battery and at the chassis before hooking it up. This helps assure that you have good connections.
Have fun with your new project if your get it!
Steve/B&B Custom Circuits

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Brian

07-26-2004 15:44:45




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 Re: Re: Which battery for a AC B? in reply to Steve in N.J., 07-25-2004 20:41:53  
Thanks Steve...good info. Now I have something to work with locally here in Ontario.



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steve

07-25-2004 18:39:41




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 Re: Which battery for a AC B? in reply to Brian, 07-25-2004 11:43:53  
if you are trying to get it running, dont buy a battery right now. take the 12 volt battery out of your truck or get a cheap one from way mart and connect it up to the cables. the tractor has a magnito and it will run without a battery. you just need to crank. probably can not jump start with cables unless you got real good cables. mine will start with the 275 amp mini battery out of the garden tractor.--- take out the plugs first and rock the tractor back and forth to see that it aint stuck. shoot a couple spoons of oil in each cylinder, if it turns, and roll it around a little.

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Brian

07-26-2004 15:43:16




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 Re: Re: Which battery for a AC B? in reply to steve, 07-25-2004 18:39:41  
Thanks Steve...I like the sound of this. I was just concerned that the 12volt might damage the starter motor, or other electrical components.



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DanD.

07-25-2004 13:21:38




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 Re: Which battery for a AC B? in reply to Brian, 07-25-2004 11:43:53  
Farm supply places usually have 6 volt batteries ..such as Farm and Fleet in Wisconsin but almost any farm supply store with batteries will have what you need. I can't tell you exactly what size you need. Get the one with the largest CCA rating that will fit in your battery box. Measure length, width, and height then measure the batteries to make sure they'll fit. I could show you which battery you need, but I don';t remember the specific frame size.
Cost is probably somewhere around $40 and make sure no one has replaced the cables on the tractor with small cheap 12 volt automotive cables. They don't work well with 6 volts because with half as many volts, you need to have twice as many amps flowing through the wires to do the same work and the diameter of the wire determines how many amps it will carry.

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