D2 hydraulic issue

I sm wondering if the hydraulic lines are crossed .Moving the control lever forward should extend the hydraulic cylinder rods to drop the blade. Pulling control lever back should retract cylinder to raise blade .Using one spool valve . 2nd spool valve would be used for rear cylinders for draw bar pulled equipment .

We have parts books for several hydraulic control units fitted to D2 tractors in the members library. Do you know which model hydraulic control unit you have and it’s serial number?

It still has all original steel lines, so can't be messed up. The rubber lines haven't been removed, so they are hooked as when it was working before. And yes, that is the way it should be, pull back to raise. It doesn't make noise like cavitation from air. Just odd..🤔 When you push the lever forward, they retract slowly and not much pressure either. I may be in need of one of these books! It is a 44 model, I believe an 8w series unit, 2 spool. I will check when I go back to the shop. I took the bypass valves apart, didn't see anything alarming.