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 

Replacing generator with alternator


 
Post new topic    
View previous topic :: View next topic  
Author Message
Vinegar Ben
Regular


Joined: 21 Mar 2021
Posts: 60


Report to Moderator

PostPosted: Tue Nov 22, 2022 5:09 am    Post subject: Replacing generator with alternator Reply to specific post Reply with quote

I have ford 8n, 6 volt system side mount distributor. The generator is mounted on left side from seat view. Wondering if I would benefit replacing the generator with 6 volt alternator without changing anything else? Cost, charging, starting issues?
 
Back to top
View user's profile
Bruce (VA)
Tractor Guru


Joined: 24 Feb 2003
Posts: 17879
Location: Old Church VA

Report to Moderator

PostPosted: Tue Nov 22, 2022 5:33 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

I have 3 Model A's all with 6v positive ground Nu Rex alternators. The primary reason for an alternator is these are cars driven on public roads at night. If you
have ever tried that w/ a generator and cut-out, you know what a PITA that is.

Putting a 6v alternator on a 8N will not give you much other than a quicker recharge on a battery. And you will need to fab brackets.

https://www.nurex.com/alternator-6-volt
75 Tips

 
Back to top
View user's profile
TheOldHokie
Tractor Guru


Joined: 08 Apr 2005
Posts: 11515
Location: Myersville, MD

Report to Moderator

PostPosted: Tue Nov 22, 2022 6:24 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

Vinegar Ben wrote:
(quoted from post at 09:09:51 11/22/22) I have ford 8n, 6 volt system side mount distributor. The generator is mounted on left side from seat view. Wondering if I would benefit replacing the generator with 6 volt alternator without changing anything else? Cost, charging, starting issues?


Just go 12v - they are dirt cheap and reliable.

TOH
 
Back to top
View user's profile
Eman85
Long Time User


Joined: 30 Jun 2015
Posts: 711


Report to Moderator

PostPosted: Tue Nov 22, 2022 8:36 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

Does the generator/charging system work? If so it's been good for 70 years why change now? An N tractor requires very little amperage to work and unless you wire in a sound system and a lot of lights the factory system is adequate.
 
Back to top
View user's profile
t.henrie
Regular


Joined: 11 Sep 2017
Posts: 24


Report to Moderator

PostPosted: Tue Nov 22, 2022 9:07 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote


Just my thoughts: The old 6v system is perfectly fine for the N series tractors if it is in working order. If you are having problems with it and it's not just wiring trouble, there is no reason NOT to update it to 12V. If you are handy, there is no reason to have to pay up to $300 for a 6V to 12V kit. It is easy to do and can be done with parts from your local parts store for well under $100.

If you update with a 1-wire alternator (internally regulated) then you eliminate one part (the regulator) that tends to be problematic on older vehicles. If you go with an externally regulated alternator, you must replace the regulator with a 12V regulator (although some folks run with the original regulator until it dies). If you have a side-distributor model, you can go with an internally resisted 12V coil and you don't even need a ballast resistor. With a front-distributor model you need a ballast resistor, but the one already on the tractor will work. Even the 6V coil and points will work for awhile. Finally, the conversion changes the system to negative-ground and makes jump starting the tractor from your pickup a lot less exciting. I have found the starters work just fine on 12V. Just don't run the starter too long or you can fry it.

Having said all that, before you decide to convert, make sure your wiring is not the issue. Replacing the entire wiring harness is a 1-hour, $20 job (automotive primary wire and connectors are getting expensive). Also, if you decide to convert, get an internally regulated alternator that is the lowest amperage rating you can find. Your tractor cannot possibly use more than 40 or so amps, unless as mentioned above, you have installed a high-wattage boom-box type sound system! NAPA currently has about a 70A reman unit on sale for under $70.
 
Back to top
View user's profile
old
Tractor Guru


Joined: 12 Mar 2000
Posts: 95495
Location: Lake of the Ozarks area of MO

Report to Moderator

PostPosted: Tue Nov 22, 2022 9:26 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

If you want to go with an alternator go 12 volts. Batteries cost half as much as a 6 volt one and can be found most any place. Plus the cost of a 12 volt alternator is less then half that of a 6 volt one
 
Back to top
View user's profile
Jim L WA
Tractor Expert


Joined: 17 Jun 2010
Posts: 1953


Report to Moderator

PostPosted: Tue Nov 22, 2022 9:32 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

I put a 6 volt positive ground alternator on my 2N. It works great, didn't have to replace light bulbs etc. I don't have to worry about the starter drive getting stressed by a 12 volt system. As for brackets, they are readily available on this and other sites.
 
Back to top
View user's profile
jimtrs
Long Time User


Joined: 19 Feb 2008
Posts: 953
Location: Sandown, NH

Report to Moderator

PostPosted: Tue Nov 22, 2022 9:52 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

Vinegar Ben wrote:
(quoted from post at 09:09:51 11/22/22) Wondering if I would benefit replacing the generator with 6 volt alternator without changing anything else? Cost, charging, starting issues?



Cost: Depends on Alternator cost. Certainly will cost more than a 12 volt negative ground alternator.

Charging: Any alternator will be a much improved upgrade over a generator. Charges at low rpms's, and has a consistent charge rate.

Starting issues: None
 
Back to top
View user's profile
Ultradog MN
Tractor Guru


Joined: 22 Apr 2001
Posts: 27528


Report to Moderator

PostPosted: Tue Nov 22, 2022 2:10 pm    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

For 20 years here I have been arguing for
upgrading the electrics on those tractors.
The only reason I can think of to keep it
original is if you are sentimental - you
want to keep it just like Dad or Grandpa
had it.
But if you are going to do an upgrade don't
do it half way.
Go to 12 volts!
 
Back to top
View user's profile
HarryVanderpool
Regular


Joined: 23 Dec 2019
Posts: 337


Report to Moderator

PostPosted: Tue Nov 22, 2022 7:06 pm    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

Naw, not sentimental; practical!
My 78 year old tractor runs on 6 volts as designed, perfectly.
Open fuel valve, turn key on, push the button; KERR-POW, fires up instantly.
If it aint broke, don't "fix" it!
 
Back to top
View user's profile
lha
Tractor Expert


Joined: 27 Aug 2009
Posts: 2498


Report to Moderator

PostPosted: Tue Nov 22, 2022 7:10 pm    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

Same here!
 
Back to top
View user's profile
Tim PloughNman Daley
Tractor Guru


Joined: 18 Sep 2004
Posts: 4697


Report to Moderator

PostPosted: Wed Nov 23, 2022 2:39 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

I concur with Harry. Why? Is something 'wrong' with your 6V system? Non-starting? Either rewire your GEN to 12V or go all the way to a 12V setup with a 12V ALT and battery. There's nothing wrong with 12V if done for the right reasons, and there's nothing wrong with the OEM 6V POS GRN system either. FACT: 99.98% of all non-starting issues are due to incorrect wiring. Whichever setup you use, the charging device must have a fan belt tensioning device installed. Without proper belt tension, the device can never charge the battery, simple as that. Use WIRING PICTOGRAMS by JMOR as your guide.

8N 12V SWITCHOVER ON THE ANGLE (SIDE) MOUNT DISTRIBUTOR:


*PICTOGRAM courtesy of JMOR

OEM 8N WIRING(6V/POS GRN) AFTER S/N 8N-263844 WITH ANGLE (SIDE) MOUNT DISTRIBUTOR:




FORD 8N TRACTOR ESSENTIAL OWNER/OPERATOR/PARTS/SERVICE MANUALS:





Tim Daley(MI)
 
Back to top
View user's profile
Abbby
Long Time User


Joined: 28 Mar 2009
Posts: 554


Report to Moderator

PostPosted: Thu Nov 24, 2022 3:48 am    Post subject: Re: Replacing generator with alternator Reply to specific post Reply with quote

Switch to 12 volt!
 
Back to top
View user's profile
:   
Post new topic    Yesterday's Tractors Forum Index -> Ford 9N, 2N, 8N All times are GMT - 8 Hours
Page 1 of 1

 
Jump 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 ]

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