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1066 Battery Questions - 6v 3EH series or 12v 3ET parallel?

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#41 Sparky


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Posted 10 July 2012 - 08:48 AM

You know guys, the reason the 12V parallel setup cranks better is because...


When you just replace the 6V batteries, you never touch the old nasty cables, and you wonder why it doesn't start for beans.

In order to go to the 12V parallel setup, you needed to add two new battery cables, at minimum. Plus you cleaned up the connections while you were doing it.

On top of all that, if you went direct to the starter with each battery, you've DOUBLED the amount of wire carrying current to the starter. Most of the old 6V setups have too small of a cable to begin with, and half the time they were replaced with even smaller cables.

If you put brand new double-aught cables on a 6V series setup, betcha it'll crank just as well as parallel 12's.

Stop by my place sometime, I'll prove it to you.... I keep excellent cables on most everything I own. On my 966, I don't even have the battery covers, because I want to notice & clean the corrosion asap.
1/0 cables are what you'll get from CIH for the factory 2-6volt setup....

'74 966, '46 H, Two 990 mower conditioners, #15 rake and a #35 behind it, 241 bigroll baler, 560 plow, #37 disc, 19' 45 F.C. and a couple other off breeds. Got a 782 Cub Cadet, also. Not much else, but it keeps me out of trouble!

Money is NOT the root of all Evil, Lack of money is the root of all Evil...

#42 tcmtech


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Posted 10 July 2012 - 12:06 PM

Our old MF 2745 had a similar 1/0 cable setup for dual 6 volt batteries when we got it that were in rather tough shape and was a very hard starting machine at first.

I switched it over to dual 12 volt 800 CCA Walmart batteries with a 4/0 welding cable for the positive side that split about 12 inches from the batteries and went to each positive terminal with half of the 4/0 cable. For the ground I went with two independent 1/0 leads with two separate ground points directly on the main transmission casting.

So far it's been able to start down to around 0 F with just a shot of either and not having to be plugged in! ;)


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