Hydraulic joystick on Bobcat 231 issues

[lepperboy]

I have an old 1992 Bobcat 231. The left joystick acts weird Sometimes it works great, other times if you need to move the arm out, you have to move the joystick left, which in turn causes the machine to spin.
So my question, does anyone know if the joystick can be rebuilt? Or maybe something to look at to get it to function better?

Thanks!
Dave