I have some problem with my hitachi ex120-5. When i buy it i saw engine acceleration is manual like hand liver type,and maybe wirings were cut off ( i will attach the board picture) My problem is at first i saw my lrft one side drive run smooth and other side drive was weak, Then i change main pump main hydraulic pipe from left to right and right to left and then i saw left one side drive is weak and other side runs smooth and my swing and bucket got slow but when i pull the drive liver then my swing and bucket got normal
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