The Parts Catalog shows 3 part numbers for the radiator cap. One was used S/N 501 to 115029, the other 2 S/N 115030 up. I presume that is the serial number break where the radiator was pressurized. The notch gives overflow pipe clearance, so was probably added with the cap change.
The 2 pressure caps are interchangeable. One is a D number and the other is an R number. I suppose one could have the wing and the other not, but that would be speculation (and counter to what rustyfarmall said). I don't know one way or the other on that question.
I see that CNKS posted while I was adding this comment. It really would be helpful for you to crack the parts book open yourself. You might find your own answer and including what you find there with your questions would help clarify your questions. It would save everyone who is trying to help you from repeating the leg work you can do for yourself. Might help people understand what your actual question is as well.
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 - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
... [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.
