I am having a problem getting my power steering to work. Disassembled it to change out the oil seals top and bottom because of the leaking seal on the top. I found that my steering shaft was worn out at the top at the seal area, so I bought a new steering shaft, because of this I had to disassemble the entire steering. I have everything put back together, but I cannot get the power steering to work. I have a shop manual, and I reassembled everything according to the manual. My only question is the steering hydraulic spool has several plungers and check valves. I have tried every configuration I could, I first put it back the way the book shows. Still no power steering so I tried swapping the check valves with the plungers. Still no power steering. I have plenty of pressure from the power steering Pump, so I'm not worried about the filter being clogged or anything like that. Does anyone know if the check valves in the spool have little ball bearings in them. Well that's it for now, any help would be appreciated. I am at my wits end and Haven't been able to resolve this problem.