(800) 853-2651
SHOP NOW

Bad coil

I

Idaho Ron

Member
I am thinking my coil is bad so I need a new one.
My tractor is a Super C. It has a 12v alternator that uses one wire. It has a resistor that brings the voltage down from 12v to 8v at the + terminal of the coil. What coil should I replace it with? Thanks Ron
 
Valid questions in the previous post, but on each tractor I have converted to 12V I just automatically change the coil to a 12V and ditch the 6V. and better yet get a 12V with an internal ballast resistor and start circuit. Just requires a simple solenoid change which you did anyway when you did the 12V conversion. Good Luck, LarryT
 
Assuming your diagnosis is correct, a 12v for use with an external resistor is correct. As a 12v no external resistor required (and remove the resistor)
Jim
 
The coil leaked oil when I had it on the charger. I am planning on changing the points, cap, and rotor along with the coil. The rotor is stuck and I am thinking it will break when it comes off. I am thinking that that might be a good time to just change it all. Ron
 
If the ignition switch was left on with it on the charger, the coil overheated and is toast. The points open and close the circuit to the coil (about 40% of the time they are closed) thus when running the coil gets substantial time off between firing. When left on, the tractor is also not blowing air past it, and it is on all the time.

I would put a big screw driver behind the rotor, and pry it off. If it comes, cool if it breaks it is being replaced. Jim
 
Thanks. I have been down with the flu for a couple days. Soon as I get around I plan on getting with this project. Again thanks, and I will probably need more help. Ron
 
You must log in or register to reply here.

Similar threads

F
Scratching My Head On This Farmall H Ignition System
Replies
9
Views
436
Farm Boys Way
F
R
6-12 volt update points conversion?
Replies
17
Views
586
Janicholson
Janicholson
C
Electrical problem with my Cub 184 tractor
Replies
15
Views
286
John T
J
D
Need for ballast Resistor in 12V conversion
Replies
11
Views
893
Pete in Holland MI
P
X
F40 no spark. No go.
Replies
16
Views
306
xfratboy
X
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.

Copyright © 1997-2024 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

Back
Top