Posted by mEl on March 31, 2015 at 06:42:02 from (96.243.113.64):
In Reply to: Hydraulic valves posted by buickanddeere on March 31, 2015 at 06:15:54:
Quoting Removed, click Modern View to see
Vic, I spent my life working on Case hoes (50 yrs) and am very familiar with their systems. The Case hoes before closed center never had a stacked valve without a 3rd line to sump. All recent, since some early Case systems use the loader relief to control backhoe pressure as well so the protection from the low pressure being subjected to the low pressure circuits within the loader valve is taken to sump by the 3rd (tank) line off the loader valve.
The hoe valves have a dedicated low pressure circuit which goes back to the outlet to tank from the low pressure circuit within the hoe valve. Case uses a poppet and spool to direct low pressure back into the high pressure to suppliment pump flow as when the boom is dropped into a deep hole to prevent cavitation.
All Case systems are designed to keep oil pressures from bearing against spool seals and returning to the backside of the main relief.
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 - A Tinker�s Guide to Manifold Repairs - by Curtis Von Fange. A common characteristic of keeping older equipment is that some parts to make repairs can be extremely difficult to locate. For example, finding a replacement for a cracked intake or exhaust manifold on a unique tractor or odd brand can be a frustrating and downright impossible mission. So, what is an alternative solution to scraping out that �one of a kind� piece of history? First, decide if you are one to try a repair yourself or have someone else do it. If you are uncomfortable about
... [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.
