I'm looking for some information concerning the hydraulics circuit. My 4110 has locked up twice, the pump was replaced the first time, the dealer indicated that the pump was fine and had no idea why I had trouble. Today it locked up again using the FEL, when I loosened the fittings to the pump and re-tightened, everything worked for about 2 hours. While using the FEL, locked up again. This time nothing seems to work. I'm guessing that there is a valve somewhere that is stuck. Any info would be appreciated.