I just dont know if that 12 volt truck (like many old farm tractors) uses a series voltage dropping (12 to 6) ballast resistor and a 6 volt coil or not?????????
If so?????? With the ignition on truck not running and ignition points closed, Id expect 12 volts to the ballast input but only 6 to 7 on the ballast output which wires to the coils input (NOT to distributor) terminal. With the points closed, theres of course zero volts on the coils to distributor terminal.
With the truck running if the charging system works the input voltage would rise to over 13.
A typical tractor ballast resistor is in the range of 1.5 to 2 ohms but Im unsure on that truck.
If the ballast is by passed or shorted out that would put like 12 volts on a 6 volt coil and it will overheast plus the poinst burn up quickly
Take a look at my Ignition Troubleshooting provedure for coil ignition on old tractors as it may still help on that truck
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 - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want � unless you own a monster tractor. U
... [Read Article]
Latest Ad:
Wanted to buy model 65 massey ferguson 65 diesel
[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.
