No steering Case 580B

I bought a basket case 1974 580B backhoe 188 Diesel. I got it running. The steering was toast. I rebuilt everything, plus new steering cylinders and hoses. The steering valve and lines were off when I got it. I put it all together. Everything was installed according to the parts manual. I tried it nothing happened. The pump didn’t seem to be pumping, so I installed a new pump. I could tell it was pumping, but still not turning the wheels. I took the caps off the steering valve and it was rusty and stuck. I took it apart and cleaned everything. Put it back together and it was trying to work. The cylinders would move a little, but in the wrong direction and not move much. I went over all my lines and hoses. Everything is correct according to the parts book. I took the valve back apart to make sure everything was installed correct and it is. Everything moves freely. My book says to mark the end caps on the steering valve. I didn’t do this when I took it apart. Just looking at them they look identical, but they do have different part numbers. I tried swapping them but it didn’t make a difference. I haven’t done anything with the steering hand pump at the steering wheel. When I try it it will only turn a few turns and stop. I did hear a pop. This was at idle speed. Any advice is appreciated.