left field thinking / batt ?

bobs old iron · Jun 16, 2011

probably been asked before some how/way....i know you shouldn"t put 12v batt in 6v sys equpt with lights. genny won"t charge 12v enough, burn out bulbs, so could i put 2-6v inline, pos 2 pos--neg 2 neg, pos grd, will the genny charge both batt enough? not chng to 12v either...most tractors have no problem on 6v, my jd is the stubborn one, need to ck genny and starter anyway, just thinking

rrlund · Jun 16, 2011

Yes,you can go positive to positive. One thing on a 6 volt though,that usually causes all the problems,is the size of the cables. Those small 12 volt cables shouldn't be used. You'll carry 6 VOLTS through them all right,but you'll loose 2/3s of your AMPERAGE,as in cranking amps. You need the big cables like it originally had.

buickanddeere · Jun 16, 2011

Sorry, current will remain the same at battery and load ends. However the voltage at the load will be lower than at the battery.

Janicholson · Jun 16, 2011

Sure. With that said, the CCA rating of the combination must be higher than the rating of a single battery. With two cases to account for there is going to be laee space for plate surface area.
The primary reasons for slow cranking:
Modified engines
Advanced static timing (kicks back)
Low charge in the battery
Bad battery
Draging starter
Poor brush contact in starter
Shorted field or armature in starter
Small wires (OOgauge needed on a 6volt system)
poor connections at any location
Some of these are easy to check and fix, take them in the order of easy to hard, and somewhere in the process your tractor will spin like new.
If it is a modified engine, 12 volts may be the only answer. Two larger capacity 6volt bats parallel to one another will crank harder. Jim

bobs old iron · Jun 16, 2011

let me rephrase, all 5 of my tractors are 6v. no problems, correct everything, on my j-d. i need to ck starter and genny anyway, just wondering about having 2 batts on any tractor, just a general question, would genny chrg batts on this set-up?.... thank to already replys given....i'm not changing any to 12v sys, it an't broke. lol

old · Jun 16, 2011

As long as you hook them up pairiell (sp) you can hook up 1 or 100 and they will charge up. Ya a lot fewer amps to each but still would charge.

mkirsch · Jun 16, 2011

Yes, it will charge no problem.

You are connecting the batteries in PARALLEL when you go +to+ -to-.

Parallel batteries may or may not help. They will not cure:

1. bad connections
2. inadequate cables
3. worn-out starter

Two 6V batteries in parallel was Dad's last-ditch attempt to make our M reliable before he finally gave up and converted it to 12V with an alternator. It didn't help one bit.

If you know your starter is good, your battery cables are sufficiently heavy, your connections are all clean bright and tight... A second battery in parallel should provide a boost much like a jump start.

Brad Buchanan · Jun 16, 2011

Sorry, If we are to subscribe to that theory then why do we fool around with those 00gauge cables?

We could run 24gauge wire for any load, any distance with no loss of current.

Brad

IOWA NORTHEAST · Jun 16, 2011

I will get shot out of the saddle for this, but if you do not use the lights, just drop a 12 volt in and forget it. Crank up the gen to the max, a few will even do 14 volts. The points can get a resistor, or if not your points will need to be replaced once a year maybe.

One of the biggest problems with the 6 volts, is you need to take the starter off and clean both surfaces, (tractor and starter) after all these years the rust stops alot of the grounding to the starter.

A good ol boy that run a starter repair shop told me that it will sure fix alot of the issues.

buickanddeere · Jun 17, 2011

Ask Ol'John T if you don't want to believe me.
It's called voltage drop, not current drop for a reason.

left field thinking / batt ?

bobs old iron

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rrlund

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buickanddeere

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Janicholson

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bobs old iron

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old

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mkirsch

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Brad Buchanan

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IOWA NORTHEAST

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buickanddeere

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