Bob Rooks
Elite Member
Are there load checks in this particular valve? Many loader valves have them.
This is what makes me think of blown cup seals - "3. The bucket curl function works somewhat, but relief valve releases pressure when reaching only 1500psi. Because the oil is by-passing the piston. The resistance required to create pressure is limited. I don't believe the lower pressure you're seeing is the relief popping. There should be a squealing or hissing sound coming from the valve if it's releasing. There will be a hissing sound coming from a cylinder if the seals are by-passing.
4. The bucket uncurl function works and relief valve releases pressure at 2100psi. Because the piston is at the end of it's travel, and the cup seal is up against the cylinder end."
Just my two cents because I've experienced this first hand.

This is what makes me think of blown cup seals - "3. The bucket curl function works somewhat, but relief valve releases pressure when reaching only 1500psi. Because the oil is by-passing the piston. The resistance required to create pressure is limited. I don't believe the lower pressure you're seeing is the relief popping. There should be a squealing or hissing sound coming from the valve if it's releasing. There will be a hissing sound coming from a cylinder if the seals are by-passing.
4. The bucket uncurl function works and relief valve releases pressure at 2100psi. Because the piston is at the end of it's travel, and the cup seal is up against the cylinder end."
Just my two cents because I've experienced this first hand.

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