Sounds typical for a system staying on demand . Like others suggested, make sure your single and double action setting on the aux valves are lined up, no bent or broken roll pins. If that checks out you will need to take the four bolt cover off regulator, relief valve assembly. Note, heavy spring under cover for relief valve so take out two corner bolts and put longer ones in to avoid things flying apart. You will find a screwdriver head orfice with screen . Depending on how many times it has been repaired over the years, the original had a roll pin through the orfice holding a check ball in place. This check ball bounces back and forth and closes the orfice down. As this is a hardend seat they are difficult to re drill to proper size but can be done. It is only .031 so you need wire gauge drills to do so. Screen most likely is collapsed and plugged, you can cut off bottom to clean and wrap it back up again if it is not broken. Now for the fun part. Sometimes you have to make the hole in orfice slightly larger to compensate for the wear on the lands in the control valves, mostly the hitch valve is the problem. I usually go for about .040 to start with, as if you go too large your system will not pressure up when you use the valves. But first off, clean orfice, throw away the ball, and try that with original size. You will need a new gasket and also replace the o-ring on regulator piston and polish it up nicely.
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 ]
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.
