Hello everyone. New to this T300. Had an old 642B before this. Bought it with a bad drive motor. Previous owner had the pumps rebuilt. Installed a new drive and it moves and lifts with no problem. Lots of lifting power. I can't get the quick attach to work. I pulled the valve out and put the solenoids back on it and valve seems to be working good. Goes in and out depending on which way you push the button and releases when switch is released. Quick attach doesn't work when it's installed in machine though. Seems as though the one hose going to quick attach ram always has oil pressure going to it. Parking brake doesn't work either. I haven't looked into that yet and the lift arm emergency relief is by-passed. Anyone have an idea where to start on figuring this out? Thanks