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  1. S

    High speed solenoid wiring repair? Assistance

    Hitachi ex120-3 Recently noticed My High speed solenoid had a tear in the insulation on both wires and one actually has some strands broken (pictures attached) can the black plug be taken out of the metal cap so wires can be fixed without damaging the entire solenoid?
  2. S

    Ex120 controls not working after maintenance

    Have a ex120 that’s been down a few months for maintenance and started it up today and when I hopped in it and unlocked the pilot, nothing happened. changed hydraulic fluid, rebuilt lift pump what’s the most likely issue to check for?
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    Help identifying *Hitachi ex120-2 Sensor leaking

    Here is picture of the sensor and location
  4. S

    Ex120-2 help identify container by oil filter

    I’ve looked in manual and it doesn’t show it, I have attached picture it’s by drain pan and oil filter Circled in yellow is the canister I’m trying to identify and in Green is the engine oil filter
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    Sensor/solenoid compatibility Hitachi ex120&EX150

    Are these machines sensors and solenoids interchangeable? someone local is parting a ex150 and I was wondering if i could get parts for my ex120-2
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    Hitachi ex120 swing motor leaking (what else to look for?)

    Was losing a lot of fluid at swing motor so Pulled the swing motor to replace seal Is there anything else to check for once I’m in there? also, is there more than one seal tht could be the culprit? attached picture- is the seal #35 all I need?
  7. S

    Hitachi ex120-2 hyd cylinder rod nut sizes

    Looking to purchase the correct size socket or big wrench to remove the nut on the hydraulic cylinders for a rebuild of the seals can anyone verify what size they are?
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    Zexel/Bosch supply pump rebuild assistance

    Purchased rebuild kit for my supply pump and have a few questions watched all the videos I could find and couldn’t find out exactly what I’m looking for so my pump rebuild kit came with copper washers and only 1 oring, very small 1- Mine didnt have the small oring, do they all have the small...
  9. S

    Hitachi EX120-3 operators manual, anyone have?

    If anyone has link or pdf for this excavator I would greatly appreciate it
  10. S

    Assistance with hitachi EX120-3

    I picked up a 1998 hitachi EX120-3 this weekend with it having the stalling issues I’ve read a bunch about it but lots of them say to do different things first This is my first excavator what’s the best way to systematically figure out the issues? First step, 2nd etc.. i have picture of...
    • shelbyk7
    • Thread
    • hitachi ex120-3 john deere 490e
    • Replies: 29
    • Forum: Excavators
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