I have an X331 (1997) purchased used and have fixed quite a few issues already (successfully, in part, to the great info on this forum). I have one more issue before it will be almost in great working order. When I use the right joystick I get nice proportional action except for boom down. Boom up is nice, but down takes a lot of forward joystick and then comes down quite suddenly. I can immediately boom up nicely, but down is the same; lots of forward joystick and then a sudden motion. I'm hoping I can get a few clues on here as to where to begin/how to troubleshoot. All other joystick and travel operations seem to work fine. Thanks in advance!
Does your machine have a control pattern change valve?
Should have a Standard/ISO selector above the swing lock, under the right joystick in the side panel. If it's there it might be a good thing to swap back and forth, see if the issue is in the valve spool or the joystick capsule?
According to the manual, you have to swap hoses on the control valves to change from ISO to Standard (looks like it's in ISO now). I'll give that a shot and see if using the opposite joystick changes anything. Thanks for the tip!
Must be earlier than the one I was looking at, go figure...