My Hitachi Zaxis 200-1 developed a problem today, when busy working, the joysticks become hard to the point where it is almost impossible to operate, if the operator switches the machine off and wait a while, everything is back to normal, but not for long. I'll appreciate any advise on where to start looking for the cause of it. My guess is the pilot pressure goes too high for some reason?
Hitachi Joysticks - Advise please
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