The cutout relay is basically a solenoid type switch which was used on the early tractors before voltage regulators. It's function is to disconnect the generator output to the battery when the engine is not running to prevent battery discharge. In the absence of a voltage regulator, the method used to control the generator output was to restrict the ground leg of the field coil by means of the field resistor. Without lights, the generator "F" terminal is either wired directly to ground (under the mounting screw of the cutout relay) which provides the high output of about 10 amps, or it is wired to the "F" terminal of the cutout relay which in turn runs through a 2.8 ohm resistor on it's way to ground. This is the low output, around 4 amps. With lights, they simply moved the field resistor to the switch where the operator can select the output without moving any wires. The resistor has the same rating whether it is located in the cutout relay or the light switch but the physical size differs between the two. I have one from the relay which won't fit the switch because it is slightly too long. Sorry for the long answer. Geoff
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 - Choosin, Mounting and Using a Bush Hog Type Mower - by Francis Robinson. Looking around at my new neighbors, most of whom are city raised and have recently acquired their first mini-farms of five to fifteen acres and also from reading questions ask at various discussion sites on the web it is frighteningly apparent that a great many guys (and a few gals) are learning by trial and error and mostly error how to use a very dangerous piece of farm equipment. It is also very apparent that these folks are getting a lot of very poor and often very dangerous advice fro
... [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.