Posted by FrankxR on August 15, 2012 at 19:05:18 from (75.105.79.140):
I am trying to chase down a problem of no spark in a Fcub (six volt + ground system). I cannot get the coil to fire. Neither the new one or the old one. There is six volts on the -side of the coil and I am using a starter (hot wire) switch to ground the + coil primary. You can see on the tractor amp meter that there is good current draw on grounding the coil . On the HV side I have inserted a spark tester and attached this to a ground. Opening and closing the primary switch is not giving me a spark. I have already replaced the ignition switch because it was displaying high resistance due to a low voltage on the battery side of the coil ( as low as 3.5 volts ) when grounded. Now when the coil is grounded the voltage stays around 6 volts. Am I testing this coil properly? Is it possible that the battery has too much resistance? I sort think not due to the size of the deflection on the amp meter.
The big difference between the old coil and the new coil is the primary resistance. The old was about 22 ohms and the new is about 1.7 ohms. The old has 10.5 Kohm from HV out to the primary coil and could not measure ohms to case due rubber coating on case. The new has a metal case and gives 8.5 Kohms from HV out to primary coil and is open to case.
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 - An AC Model M Crawler - by Anthony West. Neil Atkins is a man in his late thirties, a mild and patient character who talks fondly of his farming heritage. He farms around a hundred and fifty acres of arable land, in a village called Southam, located just outside Leamington Spa in Warwickshire. The soil is a rich dark brown and is well looked after. unlike some areas in the midlands it is also fairly flat, broken only by hedgerows and the occasional valley and brook. A copse of wildbreaking silver birch and oak trees surround the top si
... [Read Article]
Latest Ad:
Variable pulley for case 1530 skid loader
[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.
