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1950 JD B 6v or 12V

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Brad in VA

12-02-2002 07:32:40




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I am asking this because of the post about the 47 A below this. Mine has a 6V battery in it. COuod it handle a 12v without changing anything?? PS Clooney, John T, I got it running. HA HA putt putt!!!




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John T

12-02-2002 17:11:58




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 Re: 1950 JD B 6v or 12V in reply to Brad in VA, 12-02-2002 07:32:40  
Congratulations Brad on gettign the old girl up n running. Im in agreemt with my buddies in that keeping her original as a 6 volt system has nostalgic appeal, and if you do as suggested with the biggest heaviest rated high CCA or high Amp Hour rated 6 volt battery that will physically fit in, and use 00 Gauge Cables to the starter and ground, thats probably the cheaper way to go. If you're gonna go the 12 volt conversiion route, then youre gonna need to add a ballast resistor in series with the coil (approximatly 1.3 to 1.7 ohms and 25 or so watts), change any bulbs to 12 volt, and either get another 12 volt generator and regulator to do it RIGHT or I havent had any go bad yet when I change the regulator only and use the old generaotr. As an engineer, Im not recommending that, a 12 volter runs more field current and the armature and commutator segments are a little different, but the old 6 volt generator can still work until it fails, which could be a good while. Regarding clooneys good advice that you have to spin it faster, thats because a generator doesnt know what voltage it is basically, if you spin her faster and/or increase the field current, she puts out more, so a bigger pulley on it would help the RPM. Good Luck, let us all know, and it sounds like youre enjoying the hobby. Ol John T Nordhoff

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Clooney

12-02-2002 18:42:53




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 Re: Re: 1950 JD B 6v or 12V in reply to John T, 12-02-2002 17:11:58  
John, he has a mag, that ballast resistor might be hard to wire in with a mag.



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John T

12-03-2002 04:48:35




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 Re: Re: Re: 1950 JD B 6v or 12V in reply to Clooney, 12-02-2002 18:42:53  
Nah, I do it all the time lol.



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John T (meant smaller pulley)

12-02-2002 17:14:49




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 Re: Re: 1950 JD B 6v or 12V in reply to John T, 12-02-2002 17:11:58  
Meant a SMALLER pully to spin faster, but Ive never changed them, just used a 12 volt regulator and they did fine.



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Steve - IN

12-02-2002 08:30:23




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 Re: 1950 JD B 6v or 12V in reply to Brad in VA, 12-02-2002 07:32:40  
Brad,
Same answer as John T's below. You might damage the coil / points without a dropping resistor. The generator and voltage regulator won't be set to charge the 12V battery without some changes.

In general it's cheaper, and surely less work to stay with 6 volts. If you still have the fat 0 or 00 gauge cables, it should start fairly well. I've got an Optima 6 V battery on my 6V tractor and think it's just great. Managed to pick up two more for fairly cheap, and am going to put them in series on one of my 12 volt tractors. Idea being there's always a backup around for the 6VDC tractor. Seems to me even the Optima, even at normal pricing, is cheaper than all the expense of changing to 12 volts -- including your current 6VDC light bulbs which will go POP if you feed them 12 volts.

Steve

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Clooney

12-02-2002 08:05:50




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 Re: 1950 JD B 6v or 12V in reply to Brad in VA, 12-02-2002 07:32:40  
Brad, your "B" is 6 volt positive ground from the factory. You can change it to 12 volts [either positive or negative ground] but will have to change the generator [or spin yours faster], change the regulator to 12V, replace the lights & add a resistor to the coil if a Delco dist. If a mag it doesn't make any difference & if a Wico dist. it is a pain to make the change.
~Unless there is a need to change, like slow cranking, the need for 12 volt lighting or other pressing reason, it isn't worth changing to 12V.

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Brad in VA

12-02-2002 08:18:57




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 Re: Re: 1950 JD B 6v or 12V in reply to Clooney, 12-02-2002 08:05:50  
Well it is still truning slow no matter what I try. It is a wico X mag on it. How would I spin my generator faster??? How uch is a 12v regulator??? I guess what I am asking is how much would a 12v conversion cost. If it is a whole lot then I wouldnt think it would be worth it. But if I can do it for around 200 to 300 then OK.



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Clooney

12-02-2002 16:32:34




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 Re: Re: Re: 1950 JD B 6v or 12V in reply to Brad in VA, 12-02-2002 08:18:57  
Brad, the slow cranking speed isn't a big deal on a mag equipped tractor. It should start as long as the starter can get it past TDC on compression a few times. The slow cranking isn't lowering coil voltage like on a distributor equipped set up.
~I don't know the price on a smaller pulley, you might try Ken at Classic Generator _Phone: 817-473-1448_ to see what his price is. You could just add a 12 volt regulator [$25.00-$30.00] & use the same pulley you have on it now but you will have to keep the RPM's up for it to charge & it will discharge heavily at lower RPM's with the lights on. If you don't use the lights you could easily get by with the pulley you have now if you run it a higher RPM's for a while after you start it. ~The 6 volt lights could be wired in series to use them until one burns out, then install 12 volt lights. I ran an old "B" for 8 years with 6 volt lights wired in series before one went out & left me in the dark. But even new lights aren't very expensive.
~If it is turning over slow but isn't starting now you might have mag problems, or a choke problem [make sure the choke plate is closing completely & the throttle shaft bushings are fairly tight].

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Steve - IN

12-02-2002 21:57:11




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 Re: Re: Re: Re: 1950 JD B 6v or 12V in reply to Clooney, 12-02-2002 16:32:34  
'tis the season for cussing little twinkle lights wired in series. May be a valid suggestion 11 months of the year, but for now - nothing but sour memories!

Steve - grinch



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Steve - IN

12-02-2002 08:43:47




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 Re: Re: Re: 1950 JD B 6v or 12V in reply to Brad in VA, 12-02-2002 08:18:57  
Brad,
You should surely be able to do it for 300 bucks.
New regulator should set you back around 30 bucks. If you can find a smaller pulley for the generator, that will spin it faster. If not, whole new rebuilt generator is maybe 80 plus core charge. Change all the light bulbs to 12 volts.

Check the battery cables. Lots of them get changed to 12 volt cables over the years. If so, going back to 6 volt cables should fix you up a lot cheaper.

Steve

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deereman josh

12-02-2002 08:41:14




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 Re: Re: Re: 1950 JD B 6v or 12V in reply to Brad in VA, 12-02-2002 08:18:57  
this is just a thought but you might want to try an 8V battery. it will crank over a lot faster and you wount have to change your lights or anything. you may need to make an adjustment on the generator but that is about all. i did it to an old 47 Hudson and it worked just fine. good luck.



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Brad in VA

12-02-2002 08:42:52




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 Re: Re: Re: Re: 1950 JD B 6v or 12V in reply to deereman josh, 12-02-2002 08:41:14  
Sounds like a good idea. Might try it. It will be cheeper and if it dont work then I guess I will shell out the bucks to go 12v.



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