A customer of mine has a hitachi ex300-3 not swinging correctly. The issue is that it will not swing until another function is used, tracking it moving the boom, ect. Haven't got to do a whole lot of troubleshooting the machine is in a pretty remote area so was going to see if anyone had any ideas before I got to it. Relief valve maybe? Haven't worked on a whole lot of these. Tia
Ask for schematic and post it here.
Is there a similar issue when only using the left side track ?
I do not believe so.
Does the engine load up when trying to swing ?