I have been working to get my powrtrol and rockshaft working on my 630. The hydraulic pump probably hasn't been engaged in at least 20 years. I put fresh oil in, then I engaged the hydraulic pump and worked with the levers. It's a single remote system. Then after shutting off the pump and moving the remote cylinder lever to a neutral position, I still am getting some oil leaking out of the breakaway couplers (or barrels or what each person calls them). Doesn't really stop leaking after a few minutes either, its just a very small amount dripping out over time now. I am guessing that there is o rings or seals that have gone bad after I started working with the system again? I have a parts diagram, I am just wondering what parts and how far up I need to stop the leaking in the couplers? Thank you