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Allis Chalmers Discussion Forum

Converting to 12 volt ??

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09-05-2019 12:22:21

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The Allis C I purchased has electric start that is of course 6 volt. I see field coil kits available to convert to 12 volt. Is that all that is needed to switch the starter over to 12 volt? My tractor does not have the generator or the mounting bracket. I want to intall a single wire 12 volt alterator on it which is a simple wiring harness to build. I rewired my 4010 JD to 12 volt from 24volt with a new starter and alternator. It works very well. Just learning and asking if anybody has done this?

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09-05-2019 16:49:27

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 Re: Converting to 12 volt ?? in reply to Lumbersawyer, 09-05-2019 12:22:21  
This tractor does not have a distributor, it uses a FB magneto. It is a 1943 Allis C so most likely came with a magneto. I'll I would need is to charge the battery and maybe some lights eventually. Thanks for your replies. My dad had electric start on his B Allis and his WC. The WC would brake the drive spring on the starter once in awhile.

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09-05-2019 19:37:19

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 Re: Converting to 12 volt ?? in reply to Lumbersawyer, 09-05-2019 16:49:27  
Use smaller battery cables like say the 2 gauge you find in auto parts stores. That tend to lessen the blow of the bendex flying out

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09-05-2019 16:25:09

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 Re: Converting to 12 volt ?? in reply to Lumbersawyer, 09-05-2019 12:22:21  
your resistor is still probably on your tractor. just put it before your 6volt coil and install your one wire alternator hook it to the amp gauge and your ready to go. vey easy and really a must for these old tractors. starter could care less. just remember a good starting rule. after 5 seconds stop the starter. again for 5 seconds. if it don't start then you have a problem. good luck

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09-05-2019 13:26:18

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 Re: Converting to 12 volt ?? in reply to Lumbersawyer, 09-05-2019 12:22:21  
Yes, your starter needs nothing to work. All you need is a 12 volt coil with a built in resistor at Carquest about 26.00. I like the the mini one wire altinator by Denso, you can order on eBay for about 55.00 free freight. You can use the amp gauge that is on the tractor just hook up opposite to the way it's hooked up now and it will work correctly. I may have a bracket if you need one. Should be easy to make the belt adjusting piece. I just finished a Allis G and it's 12 volt.i think I have a picture. I didn't even use a gauge I just went straight from alt. to the battery wire on the starter. Hope this helps.

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Aaron SEIA

09-05-2019 13:21:49

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 Re: Converting to 12 volt ?? in reply to Lumbersawyer, 09-05-2019 12:22:21  
Like Old said, no need to mess with the starter. It'll do just fine for years on 12v.


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09-05-2019 12:42:44

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 Re: Converting to 12 volt ?? in reply to Lumbersawyer, 09-05-2019 12:22:21  
No need to up grade the starter they work just fine on 6 or 12 volts. Most of my tractor are 12 volts but most still have the 6 volt starters on them and have for decades

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