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Farmall & IHC Tractors Discussion Forum
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Model A 12-volt conversion

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A-BOB

09-21-2004 06:08:12




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Good morning everyone. It's been some time since I have been on the site. Too busy with non-tractor things.

I want to convert my 1945 A to 12-volts. Bob M. had posted some wiring diagrams and advise sometime ago and I don't seem to be able to find them again. Any advise?

Thanks to all.




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A-BOB

09-22-2004 06:07:04




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 Re: Model A 12-volt conversion in reply to A-BOB, 09-21-2004 06:08:12  
Thanks for the help and nice comments. Someone had converted at least the battery and alternator when I purchased the tractor. The tractor has a magneto. I've finished most of the hard work and now want to tackle the electrical system. I agree that here in North Georgia, the 12-volt starting system is not necessary. And, I really did want to stay orginal, but the alternator shop talked me into the 12-volt. Other than having a 12-volt alternator that came with the tractor I can go either way. Of coarse I would have to find a generator. The wiring harness was shot and I haven't bought the new one. The lights seem to be able to handle either 12 or 6-volt bulbs. So now I've come full circle. Actually I think I would like the old 6-volt sound. By the way my Dad was a IH dealer and I kinda grew up around these and am reliving my youth.

Bob, it looks like if I do stay with 12-volt, the diagram you sent to me, and thank you, is for a distributor rather than a magneto.

Any ideas where to begin to look for a generator?

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Hugh MacKay

09-21-2004 17:52:32




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 Re: Model A 12-volt conversion in reply to A-BOB, 09-21-2004 06:08:12  
Bob: Like Bob said, I'd look hard at making 6 volt work. A properly maintained 6 volt system, will start any gas letter series Farmall, anywhere in North America that at anytime temperature is not below -40F.

I have a Super A, 6 volt and a 130 and 140 both 12 volt. I will guarentee any 3 people can go to my unheated shop at -20 and the guy who picks the Super A will be going first.

Now if you just want a better charging system then go to a 6 volt alternator. Don't believe me, then just type on your favourite search engine, " 6 volt alternators". You will be surprised at whats available. No resistors, no lights to change, no battery to change, just place a 6 volt alternator where 6 volt generator was.

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lee

09-22-2004 08:12:36




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 Re: Model A 12-volt conversion in reply to Hugh MacKay, 09-21-2004 17:52:32  
The key word is properly maintained, so how come those other two tractors don't start? LOL, Prolly because you're always maintaining that 6 volt. If 12 volt system is already there working, why change it. The alt is a more reliable unit.
Just an opinion as opinions do vary.



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Hugh MacKay

09-22-2004 15:37:00




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 Re: Model A 12-volt conversion in reply to lee, 09-22-2004 08:12:36  
Lee: Not so I really don't spend a lot of time on any of them. I took the cables off all of them about 2 years ago. I put a new ground cable on SA at that time, and just generally cleaned terminals. I have 1 guage cable on all of them, and all ends are soldered on. There is only one reason why 130 and 140 are 12 volt. I have attachments I operate on those tractors with 12 volt motors.



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Ramon from NC

09-23-2004 20:41:42




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 Re: Model A 12-volt conversion in reply to Hugh MacKay, 09-22-2004 15:37:00  
Hugh, What type of attachments do you have that use the 12 V motor on the tractor? Ramon



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Bob M

09-21-2004 06:27:09




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 Re: Model A 12-volt conversion in reply to A-BOB, 09-21-2004 06:08:12  
Welcome back Bob! Punch below for the alternator wiring diagram.

However before you do a conversion what kind of problems are you having with the existing 6 volt system? Often some simple maintenance (like cleaning up connections and installing new, properly sized battery cables) will bring the orignal 6 volt system back to life. And it will save you money and effort as well.

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