cat 330b functions on its own.

Hi



I have a cat 330b excavator that when the stick is operated in either direction, it carries on going until the full lock position even if the Controls are left alone. If the controls are then pushed in the opposite direction the function still carries on in that same original direction. The machine then has to be shut down and restarted. This occurs in both stick in and stick out. This happens after a few hours for about 10 min then rectifies itself for a few more hours.



Thanks for any help.

cat 330b functions on its own.