This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Allis Chalmers > Farm Equipment
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


Positive ground ??
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
DougG View Drop Down
Orange Level
Orange Level


Joined: 20 Sep 2009
Location: Mo
Points: 8106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Topic: Positive ground ??
    Posted: 04 Aug 2024 at 7:12am
Can someone please explain the concept of positive ground ? I remember years ago my Uncle and his friends talking about this- I beleive they had a JD B with this setup- seems crazy but Im sure someone thought it was a good idea
Back to Top
Sponsored Links


Back to Top
jaybmiller View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 22443 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2024 at 7:18am
think it comes from British coal mines ,long, long ago.
they used DC electric power for equipment(trains and drills,etc. )

a positive ground reduced the corrosion factor

hay, that's what I was told....1/2 century ago......
generators can be 'flashed' to be either +ve or -ve ground....

When 'solid state' devices(aka transistors....) came out, it was easier to design/build 'negative ground' alternators,radios, etc.
I'm sure DK can explain far better..... !!!
3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water
Back to Top
DougG View Drop Down
Orange Level
Orange Level


Joined: 20 Sep 2009
Location: Mo
Points: 8106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2024 at 7:54am
Thanks Jay, yup that what they were doing - something with the generator, seems like the JD B had a 6 or 8 volt system too?
Back to Top
Phil48ACWC View Drop Down
Silver Level
Silver Level
Avatar

Joined: 17 Jan 2013
Location: Vermont
Points: 288 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Phil48ACWC Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2024 at 7:56am
I've read, electrons are negatively charged and in a battery the electrons flow from the negative to the positive side. So in the early days of electric start cars, the thought was to hook the negative side of the battery to the starter to get better cranking. It turned out it didn't make any difference. Over time car manufacturers adopted negative ground connections. I believe Ford was the last US car manufacturer to go with negative ground. They didn't change until the late 1950's. 

Edited by Phil48ACWC - 04 Aug 2024 at 8:09am
Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 81060 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2024 at 9:00am
Most systems befor 1960 were positive ground and most of them were 6 v systems. Thre is no difference at the generator, the wires, the starter or anything else... Basically all you do is connect the POSITIVE side of the battery to the tractor frame as a GROUND... and the NEGATIVE side of the battery goes to the starter switch / solenoid.. The generator is putting out 6 volts NEGATIVE as the output terminal is connected to the NEGATIVE side of the battery ..... when you switched the cables on the battery..

Phil and Jay have covered the WHY they did this.... Sometime around 1960 everyone started to switch over to NEGATIVE GROUND... When they gave up on generators and went to Alternators, that was the end of the POSITIVE ground for good.
Like them all, but love the "B"s.
Back to Top
DougG View Drop Down
Orange Level
Orange Level


Joined: 20 Sep 2009
Location: Mo
Points: 8106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Posted: 04 Aug 2024 at 10:49am
Thanks Steve!
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.051 seconds.


Help Support the
Unofficial Allis Forum