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Farmall & IHC Tractors Discussion Forum
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6v to 12v

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Farmall H Newbi

12-03-2006 22:17:06




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I am thinking about changing the 6v system in my 1943 H to a 12v system for more cold cranking amps and jumpstarting from my truck.

Can it be done?

pros and cons?

Thanks




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brstsmith

12-10-2006 07:42:52




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 Re: 6v to 12v in reply to Farmall H Newbie, 12-03-2006 22:17:06  
Has anyone ever used a 6volt golf cart battery? plenty of CCa's



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CNKS

12-04-2006 07:51:19




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 Re: 6v to 12v in reply to Farmall H Newbie, 12-03-2006 22:17:06  
Up to you, the H is marginal as to whether or not it really needs a 12 volt system. Most dead or low batteries are caused by lack of use, along with corroded wires. I have a 6 volt H and a 12 volt M, both are problems if not used much. The easy solution is to buy a trickle charger and leave it plugged it. If it has a mag, crank it. I did that for years, and no, it never ever kicked back on me. The people who say that have not owned one.

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John T

12-04-2006 07:50:03




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 Re: 6v to 12v in reply to Farmall H Newbie, 12-03-2006 22:17:06  
Sure it can be done and you can use a new or used or rebuilt 12 volt genny and 12 volt Voltage Regulator or have your 6 volt genny rebuilt to 12 volts or go the 12 volt alternator route if originality dont matter whatsoever to you buttttt ttttt ttttt ttttt ttttt t

Especially on an H which isnt all that hard to crank, whu not keep it original 6 volts??? If slow cranking is a problem try the biggest heaviest highest CCA and Amp/Hr 6 volt battery that will physically fit and use 00 gauge battery n Starter n ground cables and if shes kept in tune and the engine is in any kind of condition at all she ought to start just fine even at cold temps. If she dont despite the things I mentioned, Id fix the problem before I butchered up the tractor if it were mine, but its your tractor and your choice so if you wanna convert it and need more detailed instructions post back n let us know.

best wishes

John T

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Allan In NE

12-04-2006 07:53:01




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 Re: 6v to 12v in reply to John T, 12-04-2006 07:50:03  
Yep,

That is exactly what I was thinking. Somebody needs to go buy a battery.

Allan



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John T

12-04-2006 08:40:21




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 Re: 6v to 12v in reply to Allan In NE, 12-04-2006 07:53:01  
And a good heavy high rated one to boot, NOTTTTT the cheapest one available off the shelf at Wally World lol. Sure I might undestand converting an M to 12 volt if it musttttt t start in extreme cold climates, but these Cubs n B's n C's n H's conversions????? ?

Take care there in Nebraska

Hoosier John T (NOT a farmall man now but used to run em a lot in the seventies)



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Nat 2

12-04-2006 09:03:19




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 Re: 6v to 12v in reply to John T, 12-04-2006 08:40:21  
My H didn't have an electrical system, only an old Delco generator off some car that looked like it was too shot to even bother with, and a few shreds of old brittle wire hanging here and there.

That's about the only reason I can think of to go 12V on an H...



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El Toro

12-04-2006 04:23:30




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 Re: 6v to 12v in reply to Farmall H Newbie, 12-03-2006 22:17:06  
If you install a 12 volt alternator your coil wiring needs to be changed. Using a negative ground on the battery, the wire from the negative
terminal on the coil will now feed the distributor. Since your coil is 6 volts you will need to install a ballast resistor between the coil and the ignition switch or buy a 12 volt coil similar to NAPA's 1C14SB and no resistor is needed. Hal



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gene bender

12-04-2006 02:58:33




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 Re: 6v to 12v in reply to Farmall H Newbie, 12-03-2006 22:17:06  
Of course you can. But if your starter and battery along with 1ga cables are in good shape you dont need to change. How do you think we used these tractors in1950 they started and worked just fine on the 6v system. You can find a small alternator that will fit under the hood then rewire it to the charging system change the lite bulbs get the rite size battery to fit in the box and away you go.

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Hugh MacKay

12-04-2006 14:52:34




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 Re: 6v to 12v in reply to gene bender, 12-04-2006 02:58:33  
gene: Your absolutely right, how does he think we started them way back when. 6 VOLTS was the answer. I remember once my dad and I had left 6 volt Farmall 300 at far end of the farm. Overnight the temperature dipped to -40. We proceeded to go and get the 300, as there was threat of snow that night and we needed tractor for plowing snow so milk truck could get in.

On the way dad said, "it's not really going to snow and I hope the 300 doesn't start". Well it did start unassisted by any starting aids. Guess who got to drive the 300 the 1/2 mile back to the dairy barn? There is really no reason why a pre 1958 6 volt Farmall will not start anywhere there is arable land in North America, if that 6 volt system is well maintained. 12 volt is going to require maintainence also. This Farmall H is not some modern day automobile he only keeps 5-6 years.

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