[AT] 6V and 12V batteries

[Dean VP]

Darrell/Dean Vinson,

If the 1958 620 is still wired the way it came from the factory Dean does have a 6 volt coil and distributor but everything else is 12V.  There is a bypass resistor (AA5791R) that allows 12 Volts to the ignition coil as long as the starter pedal is depressed and then the ignition runs on about 6V after the pedal is released. 12V for better starting and then runs on 6V. Supposedly better life for the points and plugs. JD first adopted this for their LP tractors and then used it for all of the 20 and 30 Series two cylinder gas tractors too. 


Dean VP
Snohomish, WA

They say necessity is the mother of invention. 
Don't know who the father is, probably remorse.
Red Green

-----Original Message-----
From: at-bounces at lists.antique-tractor.com [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Darrell Ratliff
Sent: Sunday, July 06, 2014 9:54 AM
To: Antique tractor email discussion group
Subject: Re: [AT] 6V and 12V batteries

Dean,
    There doesn’t appear to be anything tapped off at the 6 volt junction so I would guess that everything on the tractor is already 12 volt rated.


From: Dean Vinson 
Sent: Sunday, July 06, 2014 12:33 PM
To: 'Antique tractor email discussion group' 
Subject: [AT] 6V and 12V batteries

Hello, gentlemen.  Yep, no big deal indeed to have had that cable be loose.
Not really visible in the photo but since the nuts were loose the post
clamps had gradually worked their way upwards, and at some point just went
too far to let there be any cranking current.   I tapped them back down with
a piece of wood, tightened the nuts, and all was well.

The seller's son told me he just recently put new batteries in the tractor
and it certainly works fine now, so I'm in no rush to do anything different.
If those batteries die I guess I'd have to consider switching to a 12V
system.  I assume I'd have to change the lights, regulator, coil, and
generator?

Dean Vinson
Saint Paris, Ohio


-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Ralph Goff
Sent: Sunday, July 6, 2014 9:04 AM
To: Antique tractor email discussion group
Subject: Re: [AT] Fwd: Re: flooding in Saskatchewan and Manitoba

On 7/6/2014 12:50 AM, Ron Cook wrote:
> Yep.  I noticed those loose bolts on the interconnect cable ends right 
> off.  The cables are in good condition.  Near new and are in series 
> with positive ground.  However, Dean had brought the tractor home, so 
> they were obviously making connection at the time.  Not a big deal at all.
> Normal, as a matter of fact.  Heck, most have just installed a 12V 
> battery and stopped using the two sixes.  I have. That keeps most my
> batteries the same.   Just keep the correct police out from under the
> seat cushion.  I even got fed up with the 6V system on my '46 A and 
> converted it to 12V about 20 years ago. Now I can start it without 
> getting off and opening the petcocks.:-)
>
> Ron Cook
I have done the same with the JD AR. For the few times I start it a year it
does not make sense to leave to dedicated six volt batteries in it all the
time. I just borrow a 12 out of one of the other trucks, grain auger , or
anything that has an easily removable battery. And chances are I won't even
tighten the cable bolts. Just brush clean and push them down good and tight
by hand so they are easy to pull off when I take the battery out. I sure
appreciate those batteries with the built in carrying handle for that
situation as there is no room to get my hands down beside the battery to
lift it.

Ralph in Sask.


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