In Reply to: Another hydraulic 3 point hitch question posted by Max on May 14, 2017 at 18:05:51:
To me it sounds like worn mechanical linkage is the main trouble, secondary, oil leakage at either relief valve or piston.
You're right to take the cover off. Check the stand pipe that goes up the right side of the case, they rust. I had this problem years ago on my 8N