Hitachi pump kicks off

I have a Hitachi ex 220 and it was always a strong machine with plenty of power then all of a sudden the pump kicks off whenever you move it. Does so in all directions and with tracks whenever you do anything. Wait for a couple seconds and it re-engages. Is there some sort of high pressure regulator sort of something that might be acting up and cutting it off whenever it thinks it's working too hard? When it moves it has plenty of power.

Hitachi pump kicks off