Welcome! Please use the navigational links on your left to explore our website.

Company Logo (800) 853-2651 Shop Now
   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
Classified Ads
Photo Ads
Tractor Parts

Discussion Forums
Project Journals
Your Stories
Show & Pull Guide
Events Calendar
Hauling Schedule

Tractor Photos
Implement Photos
Vintage Photos
Help Identify
Parts & Pieces
Stuck & Troubled
Vintage Ads
Community Album
Photo Ad Archives

Research & Info
Tractor Registry
Tip of the Day
Safety Cartoons
Tractor Values
Serial Numbers
Tune-Up Guide
Paint Codes
List Prices
Production Nbrs
Tune-Up Specs
Torque Values
3-Point Specs

Tractor Games
Just For Kids
Virtual Show
Museum Guide
Memorial Page
Feedback Form

Yesterday's Tractors Facebook Page

Related Sites
Tractor Shed
Ford 8N/9N Club
Kountry Life
Discussion Forum

Allis B positive ground

Welcome Guest, Log in or Register

09-27-2002 14:11:32

Report to Moderator

This may be a dumb questiom, but this is our first "orange" tractor--for my 10 year old son. The tractor came with a GM-type (internal regulator), but our service manual says that the electrical system is positive ground. Just wondering how we set up the starter wiring to work with the 12V alternator with what I assume is regular negative ground. Thanks for any help.


[Log in to Reply]   [No Email]
John W.

09-29-2002 23:53:16

Report to Moderator
 Re: Allis B positive ground in reply to kevin, 09-27-2002 14:11:32  
Kevin; It sounds to me that a single wire delco alternator is on your tractor. I have a C set up that way. My started is the original 6 volt, The positive side cable is connected to the start switch on the starter together with the wire from the alternator, the negitive side of the battery is grounded to the frame. Lights are wired as usual with switch mounted in the amp meter box. I wondered about a 6 volt starter run on 12 volts, so I contacted Williams Electric, a rebuilder here, and was told the windings in the old starter were very heavy and easily able to handle 12 volts, as long as the starter was in good working order otherwise. Hope this helps. John W.

[Log in to Reply]  [No Email]
Greg Ballantyne

09-29-2002 09:03:27

Report to Moderator
 Re: Allis B positive ground in reply to kevin, 09-27-2002 14:11:32  
Another thing to consider is puttiong the tractor back to original 6 volt condition.

[Log in to Reply]  [No Email]
Duey (IA)

09-27-2002 16:29:04

Report to Moderator
 Re: Allis B positive ground in reply to kevin, 09-27-2002 14:11:32  
I have some wire diagrams on my web page that might be of help. Duey

[Log in to Reply]  [No Email]

09-27-2002 18:47:30

Report to Moderator
 Re: Re: Allis B positive ground in reply to Duey (IA), 09-27-2002 16:29:04  

Great wiring diagrams--they'll be a big help. On the hydraulic parts & diagrams I wasn't always sure which tractor model they applied to. Thanks for the info and the efforts.


[Log in to Reply]  [No Email]

09-27-2002 16:10:20

Report to Moderator
 Re: Allis B positive ground in reply to kevin, 09-27-2002 14:11:32  
as your manual says, Allis B's were pos ground as built with 6 v generator. HOWEVER, if it has been changed to 12 v GM alternator, the alternator rules, is now neg ground.

[Log in to Reply]  [No Email]

09-27-2002 18:50:52

Report to Moderator
 Re: Re: Allis B positive ground in reply to willie, 09-27-2002 16:10:20  

Thanks,--guess I was thinking that the starter would reverse rotation with the ground polarity changed to negative.


[Log in to Reply]  [No Email]
Don Lc

09-29-2002 05:11:13

Report to Moderator
 Re: Re: Re: Allis B positive ground in reply to kevin, 09-27-2002 18:50:52  
The starter will work + or - ......the only thing you want to keep in mind, is the starter was built for 6v....do not crank too long on 12v ,the starter will get hot.....let it cool and try again......

[Log in to Reply]  [No Email]

09-27-2002 20:18:03

Report to Moderator
 Re: Re: Re: Allis B positive ground in reply to kevin, 09-27-2002 18:50:52  
the starter will be fine, just spin a little faster. if you have a magneto you are o.k. if it has a distributor and coil (possible changed) then you need to verify the coil is designed for 12 volts, or has a dropping resistor. IF the alternator charges o.k. then you must have the 1 and 2 terminals connected o.k. if the battery runs down, make sure no 1 wire is switched off by a key or toggle switch.

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

Hop to:

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

Today's Featured Article - Gettin My Old Tractor Home - by Clayton Sweeney. My name is Clayton Sweeney. I am from Southern Maryland in a small town called Lothian. I am 20 and my father and I are the proud owner of a 1954 Allis Chalmers WD-45. When I was 18, I dated a girl in the next county over. Her family are tobacco farmers. It was a cold Thanksgiving evening, and we were going up to her Grandparents house. As we passed one of their barns, I noticed something orange in the corner of my eye in this old shed. It was pretty dark and I asked what it was ... [Read Article]

Latest Ad: Heritage Iron 37-45 Magazine Back Issues 54 Plus Shipping Costs Buyer Pays Shipping Costs Photo Ad also posted on here for more Details [More Ads]

Copyright © 1997-2021 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