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


D 12 charging
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
Tyee II View Drop Down
Bronze Level
Bronze Level


Joined: 06 Dec 2009
Location: Scappoose OR
Points: 66 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tyee II Quote  Post ReplyReply Direct Link To This Post Topic: D 12 charging
    Posted: 02 Jun 2023 at 11:07am
I have 2 D 12s  1 recently acquired ser # D12-3537 appears to be 6 volt positive ground ?
it has a 12 volt battery hooked up neg ground. ammeter runs negative 15-18 ? Doesnt seem right. any thoughts ?  tag on generator is stamped 12 volt

2nd tractor series 3 ser # D12-9355 Has 12 volt battery negative ground, not charging.

would like to know what the systems should be on each of these ?


Edited by Tyee II - 02 Jun 2023 at 11:38am
Back to Top
Sponsored Links


Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 87925 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jun 2023 at 12:25pm
Early D series were 6 volt positive ground.. Later changed to 12 v Positive ground.. In the last 50 years many people have changed them over to 12v Negative ground to match their car/ truck .... The starter  and battery dont care... As you said, if you have a 12v battery, it is best to have a 12v generator to match.. Also a 12v Voltage regulator to go with it..The amp meter will run backward if the system was POS ground and you connect the battery NEG ground.. switch the wires on the terminals on back of the amp meter. .... the HIGH AMPS shows that you battery is very low, or your Voltage Regulator has some problems... Many people have just converted over to an alternator with Internal Regulator and simplified the system .....

for testing of the gererator --- read this..


Its really up to you if you want it Original, or if you want upgrades... Might be nice to have ALL the tractors THE SAME.... My vote would be 12v Negative ground .... Your choice if that is with a generator/ regulator , or a new alternator.


Edited by steve(ill) - 02 Jun 2023 at 12:43pm
Like them all, but love the "B"s.
Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 87925 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 02 Jun 2023 at 12:40pm
this would be a common alternator to use... It eliminates the Voltage Regulator, couple old wires, and the generator.... you need to modify the mount a little to fit.. ONE WIRE or 3 WIRE will work...... if you decide to go with alternator, we can give you more info..
Like them all, but love the "B"s.
Back to Top
Steve in NJ View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 12 Sep 2009
Location: Andover, NJ
Points: 12000 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jun 2023 at 7:19am
I offer an Alternator retrofit kit for the "D" series Tractors if interested. Visit our website for more info.
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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 0.108 seconds.


Help Support the
Unofficial Allis Forum