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Old 12-27-2010, 11:21 PM   post #1 of 12
screamineagle66
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Default Convert to 12 volt

I posted this in the Case farm tractor forum a month ago, haven't gotten a single reply so since this forum gets so much more action here we go:

What is the list of parts I'll need to convert my 46 VAC to 12 volt ? It's going to be an amateur cosmetic restoration by myself and my daughter, and it's just too hard starting with the 6 volt system.

The tractor runs excellent, goes through the gears fine as well. I did notice some clutch smell after it sat for a couple years - any ideas or is it likely just needing replaced ?

Really nice sheetmetal, even the grill and side panels are straight.

Thanks for your help.
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Old 12-28-2010, 09:28 AM   post #2 of 12
CP7
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Default Re: Convert to 12 volt

Here's a good article on the conversion. They also have a great forum with lots of info for your VAC.

http://www.ytmag.com//articles/artint8.htm
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Old 12-28-2010, 09:45 AM   post #3 of 12
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Default Re: Convert to 12 volt

If it set for a couple of years, I would check out all battery connections for good contact, and a good ground. Clean them all! If that does not solve the problem, I would have the starter checked for condition of brushes and bearings, clean commentator. Also, have you changed the oil??? Do you know what is in it?

Let us know what you found out. Then you can spend the money on a conversion, if needed.
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Old 12-28-2010, 10:47 AM   post #4 of 12
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Default Re: Convert to 12 volt

Excellent advice Rol. That's exactly what it says in the first part of the article too.
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Old 12-28-2010, 01:30 PM   post #5 of 12
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Default Re: Convert to 12 volt

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Excellent advice Rol. That's exactly what it says in the first part of the article too.

CP7,

Where did I miss "the first part of the article"??? :-)
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Old 12-28-2010, 01:52 PM   post #6 of 12
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Default Re: Convert to 12 volt

I`d investigate the most powerful 6V battery available first, or if space is available running a pair of 6V batteries in parallel to double the amps. Will certainly increase the cranking rpm`s
Might be easier/cheaper than a conversion. JMO
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Old 12-28-2010, 09:04 PM   post #7 of 12
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Default Re: Convert to 12 volt

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I`d investigate the most powerful 6V battery available first, or if space is available running a pair of 6V batteries in parallel to double the amps. Will certainly increase the cranking rpm`s
Might be easier/cheaper than a conversion. JMO
Dual six volt batteries may be an excellent solution if the system is in good condition. No matter what you do, the system must first be checked out for full and proper function. JMHO
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Old 12-29-2010, 06:48 PM   post #8 of 12
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Default Re: Convert to 12 volt

There is something wrong if your VAC doesn't start well on 6 volts. Make sure all the connections are good and you have good battery cables. Not the 4 gauge crap from Autozone, but 00 or 02 gauge. 6 Volts will spin a VAC motor just fine.
Fixing the real problems will also be cheaper than converting to 12 volts.

My DC is still 6V and it is double the displacement of your VAC. All my other tractors are 6V and they also start perfectly. I have started my SC when it is below zero out and it spun over just fine.


Can you tell that I don't like 12 volt conversions?
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Old 12-29-2010, 09:25 PM   post #9 of 12
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Default Re: Convert to 12 volt

I have already replaced the cables, with 02 gauge. The battery is brand new, the biggest CCA they sold at Tractor Supply. The wiring under the dash has been repaced as well. There is not room for parallel batteries in there however. Those are all things I do to every tractor I buy, I have issues with crappy batteries and crappy tires.........

I have already planned on taking the starter to a local shop, as I'm assuming it needs rebuilt. I just figured rebuilding a starter would probably be halfway to converting to 12 volt.........

Thanks for the advice, I'll just get the starter looked at and if it's not crazy expensive I'll have it rebuilt.
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Old 12-30-2010, 06:58 PM   post #10 of 12
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Default Re: Convert to 12 volt

I would guess your starter needs repair. Maybe stick a volt meter on the starter while you are cranking. If it seems low, you still may have connection problems.
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Old 12-30-2010, 08:57 PM   post #11 of 12
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Default Re: Convert to 12 volt

Quote:
Originally Posted by screamineagle66 View Post
I posted this in the Case farm tractor forum a month ago, haven't gotten a single reply so since this forum gets so much more action here we go:

What is the list of parts I'll need to convert my 46 VAC to 12 volt ? It's going to be an amateur cosmetic restoration by myself and my daughter, and it's just too hard starting with the 6 volt system.


Thanks for your help.
Screaming Eagle: If you go with a conversion you may want to contact Steve at B and B Custom Circuits
77 COUNTY ROUTE 519
NEWTON, NJ 07860
PHONE (973) 632-5596
E-mail: customcircuits@gmail.comp
They specialize in Allis but Steve is very knowledgeable so maybe he can set you up. My AC conversion included a new alternator and bracket to replace the 6 volt generator, wiring harnesses, coil, voltmeter, key switch, 12 volt bulbs. It is generally accepted to keep the 6 volt starter but you don't want to be cranking it over and over. I got sick and tired of the 6 volt being dead. And you are going to negative ground. I put in a 12 Volt Die hard and I can run the lights etc. I have no worries now and the AC starts instantly. The voltmeter reads 14 volts when running. You want the three wire alternator that charges at idle. If you want to figure it out yourself most of the mail order tractors supplies the alternators and brackets, Steiner, Valubilt. I paid a little more but I am no mechanic and Steve's guidance was well worth the money, he sends written instructions with the kits. I kept all the old stuff in case I ever sell the tractor to someone who wants it completely original.
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Old 12-31-2010, 12:02 AM   post #12 of 12
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Default Re: Convert to 12 volt

You could jump up to 8 volts and get a little extra power without doing anything. possibly adjust the voltage regulator to charge A little more!
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