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Recent content by Brian K

  1. Brian K

    Hitachi 120-2 questions and anwsers

    The installation of the manual pump conversion kit seems to be working well on my 490E. I purchased the kit from SINOCMP (EX100-2 EX100-3 EX120-2 EX120-3 EX200-2 Conversion Kit for Hitachi Excavator with English Installation Instruction) which says it was manufactured in S.Korea. Payed $579...
  2. Brian K

    Hitachi 120-2 questions and anwsers

    Here is how I plumbed mine.
  3. Brian K

    Hitachi 120-2 questions and anwsers

    Before I placed the block onto the pump, I had to make sure the spring end (the long spring) was pressed over the boss on the bottom of the internal spool. I believe this keeps the spring centered and upright. To do this I had to remove the spool since I couldn't get the spring end pressed...
  4. Brian K

    Hitachi 120-2 questions and anwsers

    I'm not sure I recommend this, but before I installed the kit I used compressed air to push the spools out of the housing just to inspect and lube everything. I used some REM oil on re-assembly to make sure everything was moving and not sticking. BE CAREFUL if you take it apart, and hold your...
  5. Brian K

    Hitachi 120-2 questions and anwsers

    The heavy metal spring was not used. Attached is a photo of what parts I have left over.
  6. Brian K

    Hitachi 120-2 questions and anwsers

    Below are a few more installation photos; If I encounter any problems with the kits performance, I will make sure to post them. Brian K.
  7. Brian K

    Hitachi 120-2 questions and anwsers

    The installation of the manual pump conversion kit seems to be working well on my 490E. I purchased the kit from SINOCMP (EX100-2 EX100-3 EX120-2 EX120-3 EX200-2 Conversion Kit for Hitachi Excavator with English Installation Instruction) which says it was manufactured in S.Korea. Payed $579...
  8. Brian K

    Hitachi 120-2 questions and anwsers

    Thanks again JD. I'll post my progress and results. Hopefully the kit will work well.
  9. Brian K

    Hitachi 120-2 questions and anwsers

    Thanks for the diagrams. I just took a look at the instructions and your chart and it appears they recommend two B's and two C's for the stock EX120 kit. I'm currently examining the kit and making sure how it all fits together. It appears the one port on the bottom of the block is left partly...
  10. Brian K

    Hitachi 120-2 questions and anwsers

    Thanks for the update JD. I've been researching information about the manual pump conversion kit to bypass the PVC control electronics on these EX-120 machines. I own a tired JD490E with a FabTek tree harvester conversion. After 2yrs+ I'm getting tired of spending time and money chasing...
  11. Brian K

    Electronic Controller Repair

    Hi Everyone I'm trying to find a company that can check & repair older computer ECU's and PVC units. My specific machine is an older JD490E (or EX120-2). Thanks, Brian K.
  12. Brian K

    JD 490E & EX120-2 Engine Controller Compatability

    My EC is the definitely bad as I get fault code 4. I also get fault 26 which the tech manual states as DP sensor disconnected. I've adjusted DP sensor to factory output V setting and checked the signal/wiring voltage back to PVC box which is OK. I am assuming the PVC is also bad but not...
  13. Brian K

    JD 490E & EX120-2 Engine Controller Compatability

    Thank you for replying. It's good to know that the -2 and -3 PVC controllers aren't interchangeable. My machine S/N is 20117 so it should be a EX120-2. But it has an Arm-In pressure sensor which must have been added on at some point (it's not factory wiring) for a -3 PVC. I guess I should...
  14. Brian K

    JD 490E & EX120-2 Engine Controller Compatability

    Thank you for responding. I bought the machine in Feb (it's a 1992 model year converted by FABETEK to be a tree harvester) but didn't anticipate how complicated these machines are, and assumed Deere parts would be readily available, which their not. The Hitachi/Deere Part/No system only...
  15. Brian K

    JD 490E & EX120-2 Engine Controller Compatability

    Can anyone tell me if the EC units in the JD 490E and Hitachi 120-2/3 are identical. I know the machines are physically the same but have different engines. I need a new EC computer. When I search for the part number (9109825) most hits are listed for the EX-120. I'd be grateful for any...
    • Brian K
    • Thread
    • 490e engine controller ex 120-2
    • Replies: 6
    • Forum: Excavators
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