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Harry Ferguson Tractors Discussion Forum
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12V conversion

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Chuck Wespthal

02-06-2008 10:28:17




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I'm sure it's been on the site before but I have a TO 20 and would like to convert it to 12V so I can use a sprayer with a 12V pump. Could someone tell me what I need to do understanding my mechanical knowledge is limited.




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Randyr

02-06-2008 18:07:27




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 Re: 12V conversion in reply to Chuck Wespthal, 02-06-2008 10:28:17  
I converted a 35 from the factory 12 volt genny to a Delco 10si. The bracket was probably the hardest part, and even that wasn"t too hard. The wiring is a lot simpler, the alt output goes to the lug on the solenoid where the battery connects, and so does the voltage sensor wire, the excitation wire can go there too, but you"ll need a diode or light bulb on it to keep it from backfeeding the system when the ignition is turned off keeping the engine running.
You"ll need a 12 volt coil. NAPA sells them.
Her"s an article about that.
Link
Here"s a pic of the alternator connections:
http://www.ytmag.com/cgi-bin/viewit.cgi?bd=ferg&th=42976

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Randyr

02-06-2008 18:13:20




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 Re: 12V conversion in reply to Randyr, 02-06-2008 18:07:27  
Also, the rebuilt alternator wasn't cheap, well over $100, and then I went to the "automotive recycling yard" to get an old 10si to use as a core and got $10.00 back.
Probably would have been cheaper to buy a new clone from Jeg's or Summit. Some of them are made in China, but oh well, if you want a new 10si, that's what you'll do.



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Hal Hadaller

02-07-2008 05:35:02




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 Re: 12V conversion in reply to Randyr, 02-06-2008 18:13:20  
For about $21 incl shipping you can buy a rebuild kit for the 10SI which has ALL the parts except the front and rear housing and rotor. New bearings, reg, diodes, etc. Good as new and much cheaper. Just go on EBAY and type in Delco Alternator. The parts will come up in the list with a photo.



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Mark from the fort

02-06-2008 12:43:19




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 Re: 12V conversion in reply to Chuck Wespthal, 02-06-2008 10:28:17  
According to you post, you want to run a 12V pump for a sprayer.
It would be much cheaper to purchase (or cheaper yet, buy a new for the cars and use old one) a separate 12v battery and go that route.
I don"t know how large or how long the sprayer needs to run before killing the battery.
I wired my sprayer directly into the accessory plug under the worklight on my to35, and by the time a bought all the fittings, I spend a lot of money. Yea, it looks very clean, BUT, I only use the stinkin" sprayer 3 times a summer and for about 1 hour at a time.
I would consider a dedicated (extra) battery.

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Jerry/MT

02-06-2008 12:35:33




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 Re: 12V conversion in reply to Chuck Wespthal, 02-06-2008 10:28:17  
Why do you want to go to a 12 V electrical system?

If it"s because you want to get rid of a electro-mechanical voltage regulator, tired of looking for 6V batteries, your engine is in good maechanical shape but it"s hard to start and you think this might make it easier, or you want to get an electronic ignition and most of them require a 12V negative ground system, etc?? All good reasons, in my opinion.( The 6V ignition systems are marginal at best and everything must be "on the dime" to get consistent starting and performance from the ignition system. The 12v ignition system is a bit hotter and tolerates a lack of maintenance a little better. It won"t fix an engine that has burned valves and/or worn rings, but MAY buy you a little more time before you have to rebuild the engine.)

I"ll start of by saying I have never persoally done a 6V to 12V conversion. When I bought mine, it was allready converted. However, the technolgy in these tractors is mid-1940"s and their electrical systems are relatively simple. The hardest thing to do, in my opinion, might be to fabricate a bracket to hold the alternator and that"s not too tough. There are several articles that can tell you what a 12v conversion entails in the Research & Info section on the left under Articles. You can search the archives to get info also. Then there are the resources on this forum where the combined experience of forum participants is probably a bazillion hours.

You can buy a kit for ~$120-140 and all the stuff is there and you follow the instruction to hook it up. Depending on the shape of your wiring, you might want to rewire the entire tractor while you are at it. if you want to do this on the cheap, you can buy a Delco 10si alternator from a wrecking yard and make your own bracket and the wiring instruction may be found in the articles I mentioned or from the archives and you can do it for ~$50-60. don"t be afraid to try doing it yourself "cuz there is lots of help on these forums.

Your $"s, your choice. Good Luck!

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Richard L

02-06-2008 11:09:57




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 Re: 12V conversion in reply to Chuck Wespthal, 02-06-2008 10:28:17  
Chuck if you type in "ferguson 12 volt conversion"
in the search spot at top right of this page you will get quite a few hits for you to look at. most are TO 30 but I think you should be about the same. I can't help you personaly as I am a newbie to this also. I am sure you will get quite a few responses shortly when some of these guys come in the house.
Good luck Richard L



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