Posted by Heat Houser on July 22, 2009 at 17:42:30 from (69.66.35.73):
In Reply to: Here is a diagram posted by jdemaris on July 22, 2009 at 11:26:33:
Looking at the diagram, the loader valve and the swing/stab valve are power beyond. If all the loader spools are in neutral, oil from the 17 GPM flows to the Bm Crd Bkt valve from the loader valve's power beyond port. The 9 GPM flows to the swing/stab valve and if the spools are in neutral, the flow goes back and tees into the inlet pipe to the Bm Crd Bkt valve. (from upper left of sw valve to tee on rt side of BmCrdBkt valve)
What I suspect your problem is: When you load the boom or other function Crd Bkt, the 17 GPM is flowing backward thru the tee and exiting to tank thru the swing/stab valve some where. Since there isn't a detailed schematic of the swing/stab valve I will speculate. The unit works good when cold so suspect a valve section casting is cracked or has a pin hole. A quick test would be to leave the divertor poking oil at the power steering circuit. Remove the pipe from the tee and cap both ends. If the boom now works fine, the oil is backflushing thru the swing/stab valve. I think there should be an isolating check valve in the sw valve to prevent the Bm flow from poking backwards into the 9GPM curcuit.
Your problem should be in the swing/stab valve for when you operate swing, you are blocking the backflush from the 17GPM from getting to tank.
Hope this explanation helps but I have made a few assumptions so it may not be 100%.
BTW, most valves that have three ports, pump in, tank out, and the third goes to the next valve down stream is a power beyond set up.
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 - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
... [Read Article]
Latest Ad:
Oliver 550 Diesel runs like a watch three point hitch pto engine gone threw about two hundred hours ago nice clean tractor
[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.
