Posted by JD Seller on August 18, 2016 at 19:46:15 from (208.126.198.123):
In Reply to: Hydraulic cylinders posted by kccca on August 18, 2016 at 18:56:32:
It sound like you tested the cylinders for leaking butting them DOWN not up. You need to loosen the hose on the base end or extend side. Then apply pressure on the rod end or retract side. The seal maybe only leaking in the one direction. Neighbor had a Bush Hog 3615 and I have had to rebuilt both wing cylinders in the last two years. It was doing the exact same thing as yours is doing. The cylinder was only leaking when retracted. So it was applying pressure on the base end through the leak when you tried to fold the wings.
Another problem I have had on these type of systems is that they have an orifice in one of the hoses to limit the speed that the bush hog will fold. This also makes it so the wing will not drop as fast if a hose breaks too. I have seen these orifice fitting get plugged or stuck and cause the issues your having too.
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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
... [Read Article]
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