Your tractor didn't originally come with that screw. Other brands use it and all it does is make a more convenient location to increase the fuel delivery. The end of this screw is a stop for the metering valve inside the pump. What was commonly done was tightening the screw on the leaf spring inside the pump that controls fuel delivery which would allow the pump to produce maximum fuel. Then this external screw would be tightened so as not to allow the metering valve to open so much, thus making the engine produce whatever power level was wanted. I have one on one of my 4020's and don't really use it. The fuel is turned all the way up on it and this screw does not touch the metering valve. It's ran this way 32 years for me. Mike
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 - Step by Step 12-Volt Conversion - by Bob Melville. Below are step by step instructions to convert a 6 volt Farmall M or Super M with battery (not magneto) ignition to a 12 volt alternator electrical system.
... [Read Article]
Latest Ad:
1965 International Harvester McCormick Farmall cub tractor 2,500. Two owner tractor. My grandfather bought new in 1966, then we inherited it. Have all the paperwork original manual and all maintenance records. It starts and moves. Comes with underbelly mower, plough, and some other attachments.
[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.
