I have a 1989 Zetor 6245 with a Leon Loader. I just put the top of my hydraulic case back together after having new seals put in by the Dealer. I replaced the floor and started the engine to see if everything works. I have no hydraulic pressure to the 3PT hitch nor the front loader. I tried to bleed air from the highest fittings with no luck. What is the proper way to bleed the air from the system? The fluid level is fine. My levers are in their appropiate position. The system worked before I took it apart but the 3PT hitch would bleed down. I took the part off myself and took it to the dealer to have all seals replaced.