Yesterday's Tractor Co.
Shop Now View Cart
   Allis Chalmers Case Farmall IH Ford 9N,2N,8N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   Traditional YT Forum ViewClassic View   RegisterRegister 
 ProfileProfile    Log inLog in 

12 v regulator how to polarize


 
Post new topic    
View previous topic :: View next topic  
Author Message
snead
New User


Joined: 14 Dec 2017
Posts: 15


Report to Moderator

PostPosted: Thu Feb 08, 2018 7:54 am    Post subject: 12 v regulator how to polarize Reply to specific post Reply with quote

I am changing out my 12 volt regulator on my 74 ford 4400 tractor. I think its original . Do I need to polarize the regulator ?if yes how is it done. I'm also changing the entire wire harness that I got from AG tractors its supposed to be a complete replacement. the wire on this tractor has been messed with and needs to be replaced. Does anyone see any major problems doing this.
 
Back to top
View user's profile
JMOR
Tractor Guru


Joined: 13 Aug 2007
Posts: 21397


Report to Moderator

PostPosted: Thu Feb 08, 2018 8:11 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

There is no polarizing of the regulator. It is the generator that is being polarized. The misconception arises from the fact that the polarizing operation is most often done at the regulator because the terminals are accessible/convenient. If nothing has been done to generator and battery has not been reversed +/-, the no polarization is necessary.
 
Back to top
View user's profile
Bern
Tractor Guru


Joined: 05 Apr 1999
Posts: 5032


Report to Moderator

PostPosted: Thu Feb 08, 2018 8:44 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

JMOR nailed it - I could not have said it any better.
 
Back to top
View user's profile
JMOR
Tractor Guru


Joined: 13 Aug 2007
Posts: 21397


Report to Moderator

PostPosted: Thu Feb 08, 2018 8:50 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

CVPost-Bern wrote:
(quoted from post at 12:44:57 02/08/1Cool JMOR nailed it - I could not have said it any better.
thank you
 
Back to top
View user's profile
snead
New User


Joined: 14 Dec 2017
Posts: 15


Report to Moderator

PostPosted: Thu Feb 08, 2018 11:39 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

[ OK ,but if I remove the connections one at a time from the generator and the regulator to replace them with the NEW wire harness connectors , there would be a break in the circuit DO I THEN HAVE TO POLARIZE THE GENERATOR ? if yes how is it done.
 
Back to top
View user's profile
Mike(NEOhio)
Tractor Expert


Joined: 12 May 2013
Posts: 3131
Location: Geauga County, Ohio

Report to Moderator

PostPosted: Thu Feb 08, 2018 11:55 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

The generator retains some residual magnetism. Unless it has been sitting around for a long time or wires were crossed during assembly there is no need to polarize it.
 
Back to top
View user's profile
snead
New User


Joined: 14 Dec 2017
Posts: 15


Report to Moderator

PostPosted: Thu Feb 08, 2018 11:57 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

great , thanks
 
Back to top
View user's profile
JMOR
Tractor Guru


Joined: 13 Aug 2007
Posts: 21397


Report to Moderator

PostPosted: Thu Feb 08, 2018 12:09 pm    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

snead wrote:
(quoted from post at 15:39:36 02/08/1Cool [ OK ,but if I remove the connections one at a time from the generator and the regulator to replace them with the NEW wire harness connectors , there would be a break in the circuit DO I THEN HAVE TO POLARIZE THE GENERATOR ? if yes how is it done.
no
 
Back to top
View user's profile
rvirgil_KS
Long Time User


Joined: 07 Jul 2007
Posts: 1306
Location: Northwest Kansas

Report to Moderator

PostPosted: Thu Feb 08, 2018 2:17 pm    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

The generator is already disconnected from the battery.

The cutout relay in your regulator breaks the circuit from generator ARMature output to battery whenever the generator stops turning or whenever the generator output is less that the charge on the battery.
 
Back to top
View user's profile
David G
Tractor Guru


Joined: 11 Jan 2008
Posts: 19567


Report to Moderator

PostPosted: Fri Feb 09, 2018 6:47 pm    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

Does it have an alternator, 74 seems a little new for a generator, if alternator, then no polarizing needed.
 
Back to top
View user's profile
Sean in PA
Tractor Guru


Joined: 27 Feb 2008
Posts: 5971
Location: Southeast PA

Report to Moderator

PostPosted: Sat Feb 10, 2018 4:48 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

CVPost-David G wrote:
(quoted from post at 22:47:22 02/09/1Cool Does it have an alternator, 74 seems a little new for a generator, if alternator, then no polarizing needed.


All 1965-1975 3 cylinder thousand series (2000/3000/4000) and the various Utility and Industrial models in those series (3400, 3500, 3550, 4400, 4500) all had 12 volt generators with external voltage regulators. I am pretty sure that the 5000, 5500 and 5550 all did as well. I believe the first Ford tractor to come from the factory with an alternator was the 7000, and then the next round, the x600 series and their contemporary Utility and Industrial models all had alternators.
 
Back to top
View user's profile
Bern
Tractor Guru


Joined: 05 Apr 1999
Posts: 5032


Report to Moderator

PostPosted: Sat Feb 10, 2018 6:49 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

That is my understanding as well. It puzzles me why it took Ford tractor so long to convert everything to alternators when the folks in the
automotive side of the house did so a full decade earlier.
 
Back to top
View user's profile
JMOR
Tractor Guru


Joined: 13 Aug 2007
Posts: 21397


Report to Moderator

PostPosted: Sat Feb 10, 2018 7:33 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

CVPost-Bern wrote:
(quoted from post at 10:49:59 02/10/1Cool That is my understanding as well. It puzzles me why it took Ford tractor so long to convert everything to alternators when the folks in the
automotive side of the house did so a full decade earlier.
...and then when they finally adapted them, why experiment with so many different brands?
 
Back to top
View user's profile
Bern
Tractor Guru


Joined: 05 Apr 1999
Posts: 5032


Report to Moderator

PostPosted: Sat Feb 10, 2018 10:39 am    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

They stuck with Motorola for quite a few years until they switched to Lucas, so I don't think I'd call that a big experiment. I suspect the
only reason they made the switch to Lucas was because so many of them were being made across the pond.
 
Back to top
View user's profile
David G
Tractor Guru


Joined: 11 Jan 2008
Posts: 19567


Report to Moderator

PostPosted: Sat Feb 10, 2018 7:06 pm    Post subject: Re: 12 v regulator how to polarize Reply to specific post Reply with quote

Thanks
 
Back to top
View user's profile
Display posts from previous:   
Post new topic    Yesterday's Tractors Forum Index -> Ford All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  

TRACTOR PARTS TRACTOR MANUALS
Fast Shipping!  Most of our stocked parts ship within 24 hours (M-Th). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a company you can trust and have generous return policies. Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ About Us ]

YT Home  |  Forums

Modern View Forum powered by phpBB © 2001, 2005 phpBB Group

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