Christer Wretlind while you are looking at your hydraulic system, there is one more potential leak area that I felt needed attention.  The oil reservoir tank I received was out of round at the top flange where the oil pump o-ring is to seal.  I was also concerned about the thru hole in the bottom of the tank where the pump attaches.  If the bottom thru hole joint did leak, there is potential for the "one quart"  hand pump reserve to leak out as well.  I decided to weld the hole shut at the bottom of the tank and machine a mounting flange for the pump to attach to as shown in the pictures.  This solved both problems.

Craig Berland