[AT] Tractor batteries

[k7jdj at aol.com]

According to this link, it was manufacture choice until it was discovered that using positive ground shortened spark plug life.

  Let the flames begin!

http://wiki.answers.com/Q/What_is_the_reason_for_a_positive_ground_system

Gary

Renton, WA

 

 

 

-----Original Message-----
From: Dean VP <deanvp at att.net>
To: 'Antique tractor email discussion group' <at at lists.antique-tractor.com>
Sent: Thu, Jan 16, 2014 9:27 pm
Subject: Re: [AT] Tractor batteries


All 6V and 12V John Deere's of the two Cylinder variety had positive ground
set ups. 

Dean VP
Apache Junction, AZ

Atheism is a non-prophet organization.

-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Greg Hass
Sent: Thursday, January 16, 2014 10:07 PM
To: at at lists.antique-tractor.com
Subject: [AT] Tractor batteries

Was looking at some old tractor stuff online and was reminded of something I
have know for years but have never, at least in my failing memory, seen a
plausible explanation as to why most 6 volt tractors have positive grounds
whereas 12 volt tractors have negative ground.  At first I thought it could
be because 6 volts had generators, however, our first 12 volt tractors had
generators and later models had alternators so that doesn't seem to be the
reason. Any and all answers would be great.
      Greg Hass
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