Wow, quite a story SQ...lets try to break this down into small pieces to get this figured out.
Answer these then we will continue please. And I moved this to the Hydraulics forum, seems to fit better there.
What valve did you use? With or without PB plug?
Was this PB kit already installed on your tractor, or did you add this as part of the spool install project? If you just added this, then I know what the problem is...
Answer these then we will continue please. And I moved this to the Hydraulics forum, seems to fit better there.