I am trying to access the pickup screen for the hydraulic pump, per the book I am looking at, I have removed the side bolts that hold the drawbar assembly, except for the front on each side, which allowed me to lower it, removed the hydraulic pump, I am thinking I can take my cherry picker and lift on the base of the third arm, and using a pipe placed over the pto shaft, I should be able to remove it, however after loosening all 10 bolts for the pto housing, will not even wiggle, maybe I am missing something? periodic lose of all hydraulics temporarily is reason I am thinking screen may be plugged, before I purchased tractor, had a new hydraulic pump installed, I found out was missing both relief valves in the oil filters as well. any and all suggestions appreciated.