Posted by svaughn on June 21, 2023 at 12:50:13 from (96.4.36.28):
I recently purchased an Oliver 1800A at an auction. The tractor is in great condition, but I purchased a used Dunham Lehr loader for it and I am having trouble with the valve. The loader works fine, but I can't get fluid to return to the tractor when the loader isn't being used. The valve is a Cross brand. I believe that my tractor is an open center hydraulic system, not sure, and was wondering if I need an open center type loader valve. I think my current valve may be closed center, but not sure about that. The loader will work, but when Im not using it the fluid pressure builds because its not returning to the tank on the tractor. I removed a plug from the valve that allowed fluid to flow through when the loader isn't in use, but the loader won't move when I use the lever. I replaced the plug. I don't want to damage my hydraulic pump. Any help would be appreciated.
This post was edited by svaughn on 06/21/2023 at 12:50 pm.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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