Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Discussion Forum
:

12 volt system 6 volt system

Welcome Guest, Log in or Register
Author 
Herb Stockard

08-29-2001 21:28:29




Report to Moderator

I have model B that is 6 volt, I see alot of discussion regarding converting to 12 volt. Just exactly what is the advantage, I was under the impression that 6 volt batteries had higher amperage than 12 volt. What is involved in the conversion.




[Log in to Reply]   [No Email]
Clooney

08-30-2001 15:18:03




Report to Moderator
 Re: 12 volt system 6 volt system in reply to Herb Stockard, 08-29-2001 21:28:29  
Herb, the biggest advantage to converting to 12 volts is "STARTING EASE". Due to the limited voltage in a 6 volt system the amperage is higher for the same starting torque, almost any resistance or voltage loss in the system will cause slow cranking, hard starting in cold or damp weather, & low voltage to the coil if it has a distributor. The auto companies saw the advantage to 12 volts years ago & made the change. The biggest advantage I can see on an old J.D. tractor is easier starting on a worn out tractor, due to the higher cranking speeds & higher voltage to the coil during cranking. If the compression is low & the rings are weak or leaking the faster cranking speed will overcome that & build compression faster than it can leak by the rings to promote better starting. A second reason for converting to 12 volts is that the original generator or regulator quits working & a $39.00 Delco alternator looks like the cheap & easy way out, but they only come in 12 volt negative ground so the conversion is made..... .If you have a 6 volt system & the tractor is starting good, the charging system is working good & there are no other reasons you need 12 volts, like high power lights, snow plow electrics or other 12 volt accessories there is no reason or gain in converting.

[Log in to Reply]  [No Email]
Darryl

08-30-2001 05:18:26




Report to Moderator
 Re: 12 volt system 6 volt system in reply to Herb Stockard, 08-29-2001 21:28:29  
In my humble opinion, if everything is working correctly and you have a good engine, there is no difference between a 6 and 12 volt system. I just went through that on a B. It would not start without the aid of a battery charger in boost mode. I replaced the battery cables with heavy duty ones. Rebuilt the starter and replaced a bad starter switch. Put in new plugs and points. After that, I found a crack in the carburator flange which I had welded. Then I cleaned the carburetor. All this proved to be no help for the problem. I finally cleaned (with emory paper) the rotor contact and the contacts in the cap. The B rolled over twice, fired, and has been starting and running great ever since. The 2 cylinder was designed to start by hand, turning over slow compared to modern day engines. I believe Deere, when they went to electrical starters, purposely kept the turnover speed slow. All it has to do is hit once and given a decent engine the tractor will run all day, or until the fuel supply is exhausted.

[Log in to Reply]  [No Email]
John T

08-29-2001 23:31:43




Report to Moderator
 Re: 12 volt system 6 volt system in reply to Herb Stockard, 08-29-2001 21:28:29  
Herb, the advantage of convertng is increased starting motor speed and more energy available to the starter. On cold mornigns a 12 volt conversion can increase the likelihood of the tractor starting im many cases. What you heard about higher amperage is the fact that a 6 volt battery and starter has to supply more current to achieve the starting torque than a 12 volt system would since powwer equals volts times amps and the 6 volt system therefore draws higher starting current. But if u wnat the tractor original, then the conversion takes away from that. A conversdion generally requires a new battery (or an additional 6 volter in series), a 12 to 6 volt reducing ballast resistor ahead of the coil, new lights, and at least a new Voltage Regulator if you dont want to chage the generator entirely. If you want to do a conversion post back what what you have and we can help you more. Ol John T, Engineer in Indiana.

[Log in to Reply]  [No Email]
gary

08-30-2001 04:11:47




Report to Moderator
 Re: Re: 12 volt system 6 volt system in reply to John T, 08-29-2001 23:31:43  
We've been looking for you John T, welcome back, hope everything has been OK.
gary



[Log in to Reply]  [No Email]
John T

08-30-2001 05:48:26




Report to Moderator
 Re: Re: Re: 12 volt system 6 volt system in reply to gary, 08-30-2001 04:11:47  
Thamks Gary I was on a 3 week vacation to Grand Canyon, Bryce Canyon, Zion Parks then to San Diego in our motorhome to see my middle son graduate from Marines Boot Camp. Glad to be back Ol John T



[Log in to Reply]  [No Email]
gary

08-30-2001 19:51:16




Report to Moderator
 Re: Re: Re: Re: 12 volt system 6 volt system in reply to John T, 08-30-2001 05:48:26  
That sounds like a very nice way to spend 3 weeks, I've covered some of that territory myself. Many people have been wondering what happened to you, I may have given them a bum steer. Read my post on "Rummy's JD Bulletin Board".
If I was mistaken, I'll try to square it away.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy