Posted by oldtanker on August 28, 2011 at 16:52:33 from (66.228.255.223):
In Reply to: Case electrical system posted by teddy52food on August 28, 2011 at 16:21:28:
teddy52food said: (quoted from post at 16:21:28 08/28/11) Read his post. He has the coil hanging loose & the spark is jumping to ground to complete the circuit. Normal.
I did read his post and while working as a mechanic when confronted with a coil would always hook the new coil up without installing to be sure it was good before mounting. Some coils do have a body ground to suppress raido noise but nothing that passes electricty should be in contact to the body of the coil. Electricty goes through the coil to a switched ground called points or the trigger on IE. Now if the enternal coils were gounding to the body the tractor wouldn't even start because the coils would be shorted out all the time. Now a bad coild on the 2nd winding could jump enough to casue the sparking and not allowing the full discharge to go to the plugs....hence the rough running. Look at a front mount distributer on a Ford N series tractor. The body of the coil is plastic. One wire in that supplies power to the coil, one contact that goes to the points and one to the cap. No ground except the one to the points. points closed completing the circut builds power and when they open the coil discharges that power to the plugs. I may not have explained it well but thats how they work.
Rick
Rick
This post was edited by oldtanker at 00:02:26 08/29/11.
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 ]
Today's Featured Article - Diagnosing Engine Difficulty - Diesel Tractors - by Staff. The following suggestions are listed for your assistance. You can make simple adjustments on your tractor that will improve its operation and save you the time and expense of hiring someone to do it for you. Always make one adjustment at a time, and if the adjustment made does not improve the condition, return to the original setting before proceeding to the next adjustment. Hard Starting Cold air temperatures. Insufficient fuel.
... [Read Article]
Latest Ad:
Sell 1958 Hi-Altitude Massey Fergerson tractor, original condition. three point hitch pto engine, Runs well, photos available upon request
[More Ads]
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.