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JarrodACFan 
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Joined: 24 Jan 2012
Location: Delaware Co. IN
Points: 732
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 Topic: 6 volt to 12 volt "CA" conversion
Posted: 17 Mar 2012 at 7:23am |
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what all has to be changed to change My CA from 6 volt to 12 volt, I know the obvious to change bulbs and battery.
I don't think the starter has to be changed. and I would need to replace the generator with a self regulating alternator.
Anything else or things to watch for.
thanks, Jarrod
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1956 WD45 Narrow Front Factory Power Steering, 1953 WD Wide Front
Allis Express in Muncie, IN
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R.W
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Joined: 31 Dec 2010
Location: Swanton, OH
Points: 2975
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Posted: 17 Mar 2012 at 7:26am |
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You will need a resistor for the coil.
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In Search Of: 1958 Allis Chalmers D17 Diesel serial #9643D
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CTuckerNWIL
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Joined: 11 Sep 2009
Location: NW Illinois
Points: 22816
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Posted: 17 Mar 2012 at 8:09am |
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I wouldn't mess with buying a resistor for an antique coil. Buy a new 3 ohm coil and be done with it. The other thing you will need is a diode in line with the alternator or you may have trouble shutting the engine off. Switch to neg ground and reverse the wires on the coil.
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Gerald J.
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Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636
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Posted: 17 Mar 2012 at 10:59am |
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Need to swap the wires on the ammeter too and for the alternator probably put in a 50 or 60 amp ammeter in place of the original 20 or 30 amp.
It is possible to rewind the generator for 12 volts or to find a 12 volt generator or to just turn the 6 volt one faster, but that means it may not charge at slow engine speeds where the alternator will do very well. You'd need a 12 volt regulator for the modified or sped up generator and it has to match the field circuit if you get another from a car or truck.
Gerald J.
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mdm1
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Joined: 12 Sep 2009
Location: Onalaska, WI
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Posted: 17 Mar 2012 at 2:53pm |
Check out Duey's page. Really helpful infohttp://dueyschutter.freeservers.com/photo3.html
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Everything is impossible until someone does it! WD45-trip loader 1947 c w/woods belly mower, 1939 B, #3 sickle mower 1944 B, 2 1948 G's. Misc other equipment that my wife calls JUNK!
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CTuckerNWIL
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Joined: 11 Sep 2009
Location: NW Illinois
Points: 22816
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Posted: 17 Mar 2012 at 3:26pm |
 Gerald J. wrote:
Need to swap the wires on the ammeter too and for the alternator probably put in a 50 or 60 amp ammeter in place of the original 20 or 30 amp.Gerald J.
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Maybe I'll do that to my 45 when I get rountu replacing the key switch. Mine has been swinging to the right when I turn the lights on and to the left when the tractor is running. doesn't hurt anything as long as the operator knows about it. 
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Gerald J.
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Joined: 12 Sep 2009
Location: Hamilton Co, IA
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Posted: 17 Mar 2012 at 6:18pm |
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Ammeter backwards will work fine forever but confuse the inexperienced operator.
Gerald J.
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DennisA (IL)
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Joined: 11 Sep 2009
Location: Ridott IL.
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Posted: 17 Mar 2012 at 8:37pm |
Why would you want to? If you fix the problem you won't have to change wiring, battery, coil, lights, gauges & generator.
Would it not be easier just to fix the starter and use the right size battery cables? 6 volt battery turns my "CA" over with ease.
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Thanks & God Bless
Dennis
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JarrodACFan
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Joined: 24 Jan 2012
Location: Delaware Co. IN
Points: 732
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Posted: 17 Mar 2012 at 8:51pm |
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I am still undecided on whether to switch it to 12 volt. If the generator is bad, I will go ahead and switch it over.
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1956 WD45 Narrow Front Factory Power Steering, 1953 WD Wide Front
Allis Express in Muncie, IN
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Steve in NJ
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Joined: 12 Sep 2009
Location: Andover, NJ
Points: 11630
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Posted: 17 Mar 2012 at 10:15pm |
We offer a complete 6V-12V conversion for the B,C,CA Tractors. Gives you everything needed to do a pro wiring job. Complete with step by step instructions also. If interested, drop us a line at customcircuits@gmail.com Be happy to help you out. This one happens to be for the WD/WD45, but the B,C,CA version is very similar... Steve@B&B 
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