I have a Hitachi EX300-2 that when I increase the idle I lose control of the left track and the swing function. If I start using these functions at idle and increase the engine rpm they continue to work. However, once I stop the function I have to idle down in order to get them working again. It seems like an electronic issue but I am not familiar with this particular machine and how to troubleshoot it.
Hitachi EX300-2 hydraulic system issues
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