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  1. M

    Hitachi ex120-2 slow/week hydraulics

    Brought my excavator to a good Machanic and he can’t figure it out ether. He’s talking about trying the conversion kit to bypass the computers. Has anyone tried one and had success?
  2. M

    Hitachi conversion kit

    It bogs. I was just hoping possible problems would be limited with kit on.
  3. M

    Hitachi conversion kit

    What would be a problem to cause slow/weak hydraulics with the conversion kit installed?
  4. M

    Hitachi conversion kit

    Yes installed it then removed it but don’t know if it was working or not. Because of other possible problems.
  5. M

    Hitachi conversion kit

    Thanks for the info SES. I removed the conversion kit and bought the machine to the mechanic. Trying to start back at square one. Haven’t heard from him yet but I’m glad to hear I still have that option. Thanks again
  6. M

    Hitachi conversion kit

  7. M

    Hitachi ex120-2 Repair manual

    Awesome! Thanks so much
  8. M

    Hitachi ex120-2 Repair manual

    Thanks very much mg2361 I was looking at this one but am afraid it is basically same as the one I got. Does it show step by step removal and installation of parts like variable pressure compensated valve?
  9. M

    Hitachi ex120-2 Repair manual

    Does any buddy know where I can find an actual shop repair manual for a hitachi ex120-2 or John Deere 490e. I have a technical manual but it doesn’t have step by step removal and installation procedures. Thanks
  10. M

    Proportional solenoid valve

    Thanks again
  11. M

    Proportional solenoid valve

    Hay lachau, I tried disconnecting the 2 psv like you said and nothing changed. Swing and travel still slow/weak. Actually Travel forward and backward it’s OK but track steering is very very weak. You mentioned checking vpcv. I’m assuming I need to put a gauge at the port. Do you know how much...
  12. M

    Proportional solenoid valve

    Thanks Lachau, that’s some good things to check. Hope I can get on it today but still need to replace the psv I removed. Which was stuck. And I noticed someone had installed a nonadjustable psv. In the swing parking Spot. Which I ordered and should receive soon.
  13. M

    Proportional solenoid valve

    Thank Lachau I’ll try that. What will that tell me. Bad solenoid? And what if they don’t get faster.
  14. M

    Proportional solenoid valve

    I wasn’t blaming anybody About A sensor I just wanted to make sure I was doing it right. Considering I was told by a professional the opposite of what it says in the manual. I put the sensor on with little dot facing away from the label and The highest reading I could get was 4.1 I didn’t just...
  15. M

    Proportional solenoid valve

    Yes Nate appears conversion kit does not work. Think we’re both in the same boat. . Don’t know what link codes are
  16. M

    Proportional solenoid valve

    . Don’t know how to check pilot pressure but main pump pressure has been checked. DP sensor has been checked and angle sensor has been changed replaced. Someone told me little Dot on angle sensor is supposed to point away from the label on the sensor. Manual says opposite.
  17. M

    Proportional solenoid valve

    the 1 controller fuse was blowing so I replaced both valves on top of pump. Fuse no longer blows but no change. Don’t think all functions are slow/weak but travel and swing are real bad.
  18. M

    Proportional solenoid valve

    Ok thank you
  19. M

    Proportional solenoid valve

    Got it thanks. Spelt it wrong the first time
  20. M

    Proportional solenoid valve

    tried that he’s not listed.
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