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Recent content by jefftchase

  1. J

    JD 490 E Hydraulic Overheating

    Are you sure the dp sensor is suppose to 1.7 volts? Should it be somewhere below 1.0 volts. Below is snippet from ex120-2 manual, which I believe is same as 490e.
  2. J

    Hitachi EX120-2 30 or 36 inch digging bucket wanted

    Looking for a digging bucket for a Hitachi ex120-2, either 30 or 36 inch digging bucket. 65 mm pins
  3. J

    EX120-2 Stalling when Control Lever Down and Warmed up

    So after studying the manual some more and more reading of other posts I was able to determine that the dp sensor was reading 0 mpa when it would stall out and the pvc was not tell the pump to step down. Got to thinking that this means the pressure is high on both sides of the dp sensor (hence...
  4. J

    EX120-2 Stalling when Control Lever Down and Warmed up

    I have a EX120-2 with a stalling issue when the control lever is down. Been working on bringing this machine back to life after neglect from previous owners. The machine used to constantly stall. I have replaced the pvc, solenoids, angle sensor, pressure sensor, and dp sensor and all wiring...
  5. J

    Issue trying to connect to EX120-2 Computer with USB Cable and DR Zx

    Update to my problem with a solution found. Posting to hopefully help other dash 2 owners. After two months of tinkering I figure out the following: 1. Do not buy the Dr ZX pc cable and windows disk on ebay. Likely it will not work unless you have a really old computer you can install it on...
  6. J

    Issue trying to connect to EX120-2 Computer with USB Cable and DR Zx

    So I switched them back. It performs the same way with solenoids in either position. Bogs down and stalls when yellow wire harness it plugged into solenoid closest to the engine. Slow if I plug yellow wire into the solenoid farthest from engine. If I ground no. 2 on the relay while the...
  7. J

    Issue trying to connect to EX120-2 Computer with USB Cable and DR Zx

    I swapped the solenoids. It still bogged down and shut off. I swapped connectors (closest wire to engine to farthest solenoid) and it would operate like it was in limp mode. If I ground the no 2 terminal on the relay it operate even slower.
  8. J

    Issue trying to connect to EX120-2 Computer with USB Cable and DR Zx

    The relay clicks. And I now have 24 volts at each of the solenoids. How when I ground it and try to engage hydraulics it still stalls out. I tried swapping solenoids harness and that did not change anything.
  9. J

    Issue trying to connect to EX120-2 Computer with USB Cable and DR Zx

    I am not get any voltage on these solenoid connectors. I flipped the plate and ran the machine. Stalled out, but operate at decent pace and then slowly got bogged down and stalled. I switched the plugs and it went to weak hydraulics. I check fuses and they are good (used a test light). I...
  10. J

    Issue trying to connect to EX120-2 Computer with USB Cable and DR Zx

    I put a meter on the pin 3 and no volts. I put meter on pin 4 and had 5 volts. 0 volts on 1 and 2 pins. I tried shorting the 1 and 3 pins and not difference to flash. Still just flashing 1 red per second. Any thoughts? I just replaced the cab harness and the exterior harness. Which...
  11. J

    Issue trying to connect to EX120-2 Computer with USB Cable and DR Zx

    I have a EX120-2 and I am trying to connect with a DR ZX version thru a usb cable. Using windows xp and emulator. I worked thru the issues with the com port on the computer, but still can not connect to machine. The lights are flashing red on the pvc and ec (about once every two or three...
  12. J

    EX120-2 and Dr Ex Software

    Hi, I have been tinkering with a ex-120-2 for a year now. It was leaky and uncared for. I been fixing the leaks, but shortly after buying last year the hydraulics went out (it was real jerky and would stall when I would steer hard right before it all went out). Anyways I replaced the dp...
  13. J

    Cat943 Loader 4 in 1 cylinder removal

    Here are the photos. Ideas are appreciated on the removal. Snows melting and I would like to move some dirt!
  14. J

    Cat943 Loader 4 in 1 cylinder removal

    I am trying to removal the 4in1 bucket cylinder from the machine for rebuild and got it almost off. I am left with trying to remove the lower cylinder pin, but I am not having any success. See the pictures. There is a retain bolt which I have removed but the pin seems to of been pressed in...
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