Steve.........ya gotta understand what the "infamous ballast resistor" does. It is an "auto-magic" electronic trick that changes resistance with temperature. Heres the deal, in 1939 when the 9N tractor was designed, batterys were NOT DIE-HARDS, they were die-eazy when the starter motor sucked 150-amps of power outta the battery. So Ford designed the weird 4-nipple squarecan coil to run on 3-volts (+) the ballast resistor. The ballast resistor cuts the 6-volts down to 3-volts AFTER the tractor starts. But because of the COLD temperature, the ballast resistor acts like it is not even there and supplies 6-volts to the 3-volt coil for HOTTER sparkies and quicker starting. Once you let up on the safety interlocked tranny starter switch, the ballast resistor changes resistance value in about 2-mins and now the squarecan coil gitts its designed value of 3-volts. Modern 6-volt roundcan coils are built differently and do NOT need the "infamous ballast resistor". Isn't that amazing??? ........respectfully, Dell, yer self-appointed sparkie-meister
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 - Farmall 460: That's My Girl - by LeAnn R. Ralph. How many sounds can you think of that are as familiar to you as your own breathing? What about the hum of your refrigerator? Or the thump of your clothes dryer? Maybe the engine of your car? You hear those sounds every day, and you don't think much about them, do you. I can think of a few common, ordinary sounds in my daily life, too.
... [Read Article]
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.