Bruce , Your the expert now .
the old guys like me are vaporlocking fast , so write this down . the dealers knew this . no one else did .
At the oring store LLC they have your seals at very low cost . Please keep this off Facebook I hate them .
with your spool out wet sand each end With worn 1200 # paper .
The side of the spool that has a Small 64th inch hole to Bleed oil Should Go to the in board side so oil pressure Hits that seal First .
If your centering valve works you will have assist If not the pump will WINE at idle . Don't mess with it unless you have to .
Next take your New Seals and Soak them in Dot #3 brake fluid For 15-20 min. we never soaked them more than that .
Install them WET with brake fluid on your fingers . and bolt the unit up and hook it up .
The First Fluid your seals should see IS "Duralube " engine oil treatment . pour in a half bottle and let it drain for a few min . then top off with Type F .
Call me in the morning !