Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Attention Forum Users: On the 28th of December 2023 at 9:00am Central Time, we will be taking the forums down for maintenance while we prepare the new forums for your use. Please click here for more information.

Discussion Forum
Order Ford 8N Parts Online

8N Ballast/dropping resistor.

Welcome Guest, Log in or Register
Author 
Lester Lawson

11-09-2000 06:55:12




Report to Moderator

working on friends 8N Need resistnce value and part number: Side mounted dist,6V syst. someone has removed the terminal block and resistor and connected 6V directly from the ign. sw. to the neg. side of the coil. Points are being fried at an alarming rate, tractor will run, but not very well, not totally due to high V across the point. The F04 manual does not mention a resistor and the harness diagram is vague, does show a terminal block. I have researched the archives (all 15,000)looking for the ometric value and part number for the proper reisitor. Any assistance you may provide in cross training this old aircraft mech. to a tractor troop will be appreciated. I am amazed at the amount of technical assistance willingly provided by the folks on this board. We have something similar for AF aircraft folks worldwide, to assist it troubleshooting, maintaining and repairing the fast burners. Thank you Les in SC

[Log in to Reply]   [No Email]
Nolan

11-10-2000 18:01:56




Report to Moderator
 Re: 8N Ballast/dropping resistor. in reply to Lester Lawson, 11-09-2000 06:55:12  
I'm going to be the odd man out, and suggest you look at the capaciter. I don't think a 12 volt coil would burn out points, I think it just wouldn't spark very well. But a non functioning capaciter, that would cause you to burn out points in short order.



[Log in to Reply]  [No Email]
Lester Lawson

11-10-2000 10:26:14




Report to Moderator
 Re: 8N Ballast/dropping resistor. in reply to Lester Lawson, 11-09-2000 06:55:12  
Thank you Claus,Dell,Fred and Norm. This will very likely not be my last request for expert advice. I do appreciate your promp assistance, now to remove and determine origin of the coil and hopefully make my friends problems go away. Hate to tell you this, but I own two red tractors. A "H" and a Super "A" Thanks again. Les in SC.



[Log in to Reply]  [No Email]
Claus is correct.......Dell (WA)

11-09-2000 11:44:19




Report to Moderator
 Re: 8N Ballast/dropping resistor. in reply to Lester Lawson, 11-09-2000 06:55:12  
Lester..... ....really sounds that your friends sidemount 6 volt 8N has an "incorrect" ignition coil. Drawing too many "AMPS". Most ignition systems are designed to draw about 3 amps. Its a points contact area thing.

From there the ignition coil designer determines how many wire turns to get the electomagnetic field flux required to satuarate the iron core so that when the points open, the sudden collasp of the magnetic field will fully transform the highvoltage secondary of about 30,000 volts.

From there (#turns in primary), the coil designer determines the resistance of the primary wire used, which is determined by diameter of wire, which determines the amps flowing under the voltage being supplied by the battery/generator. Its an "Ohms Law" thing.

Now that you understand ElectroMagnetic Theory 101, And from your stated problem of burning points, and if indeed, you have the correct ignition coil, then the most likely suspect is a bad (open) or no ignition condenser.

Unfortunately, I don't have the ignition coil resistances "memorized" and I can't readily find my "table". But as a general guess, primary resistance probably close to 2 ohms (3amps = 6 volts/2 ohms) and secondary resistance close to 15,000 ohms.

Bottom line, for OEM 6 volt sidemount N-Tractors, there is NO ballast resistor used. ..... .....Dell

[Log in to Reply]  [No Email]
Claus

11-09-2000 07:47:20




Report to Moderator
 Re: 8N Ballast/dropping resistor. in reply to Lester Lawson, 11-09-2000 06:55:12  
As Norm stated, if you have the stock 6 volt coil for your tractor, then you would not have a ballast resistor. If you have some aftermarked coil, then most likely you would need one. It is difficult for any one to guess what you have and make a recommendation. Perhaps, if you get the correct coil, you would have a point of reference.
Happy Motoring
Claus



[Log in to Reply]  [No Email]
Fred OH

11-09-2000 07:37:29




Report to Moderator
 Re: 8N Ballast/dropping resistor. in reply to Lester Lawson, 11-09-2000 06:55:12  
Lester, Your work has already been done for you by Claus. Just scroll down till you find a post entitled Alternator Problem. Then scroll down to the bottom of the post till you find the word "link" and click your mouse on it. It'll take you to his website and your troubles are over. Be sure and bookmark it for future reference cause it's got everything you need about N series Ford electricals. It's on page one right now. Be sure and thank him when you see him, he's around here everyday. L8R----Fred OH

[Log in to Reply]  [No Email]
norm-wy

11-09-2000 07:23:39




Report to Moderator
 Re: 8N Ballast/dropping resistor. in reply to Lester Lawson, 11-09-2000 06:55:12  
Les
If the 8N is using a stock coil and the original 6V ignition system, there is no dropping resistor required. If it has been converted to 12V I can't help you but others will certainly post the info. HTH



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

Hop 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 ]

Home  |  Forums


Copyright © 1997-2023 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