hydraulics control unit

Hi my Hydraulics control unit is defect. A new is not an option https://nemigaparts.com/cat_spares/etka/part/6N0142060J/ I have taken it out of the car. A few questions: 1 Can i refurbish by myself, Im medium skilled, have no special tools? 2 Is there a manual for how to refurbish it? 3...