how to fix vavles?

[Supermario]

I made the same mistake the first time I had to set up the valves.
I naturally thought the square blocks that the servo hooks up to should be perfectly square in relation to the rest of the valve body when installing and setting up servo. Not true with these valves! Through a lot of trial and error I found the place where valves were fully closed and open. And that was nowhere near square and centered.
Let's say your working on the boom function. Manually try to raise and lower the boom. If it moves free slowly turn the valve by hand until you feel some resistance.
It's not an exact way to do it but will get you a decent starting point to find fully closed and can then use trim tabs to make finer adjustments.
Make sure you start with the first section on the valve. The one that gets the oil first.
Be patient, very slight adjustments make a big difference. if the trim tabs aren't giving enough range you may have to rotate the servo coupler one spline .

Hope this helps, hard to explain.