I just found this site while searching for information on 442 excavator. I bought a weld on aftermarket thumb and having trouble getting it to work. The hoses are connected to the bottom port of the aux diverter valve on both sides of the stick. I have owned machine about 6 months and it looks like nothing has ever been hooked to aux ports. Trouble shows up when I press bottons on right joystick and nothing happens. Is there something that needs to be enabled for aux ports to work? There is a jackhammer switch on dash, doesn't matter which way it is set. I like the machine but don't get a warm fuzzy feeling when reading reviews about parts and service costs.