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  1. Price

    Hitachi 120-2 questions and anwsers

    I have a John Deere 490E. I bought a throttle lever cable from Napa. It has the knob with the push button and you can turn knob for fine adjustments. It was $120. Length was 15’. I have not installed it yet but looks like it will work well. I am interested to hear how the kit works out.
  2. Price

    1995 John Deere 490E Angle Sensor Question

    My machine was doing the same. The angle sensor was the major problem. I also replaced the resistor in the original PVC as it was blown. These two things made the machine run a lot better. I ended up replacing the PVC due to the light not coming on. I had checked the wiring harness and had...
  3. Price

    1995 John Deere 490E Angle Sensor Question

    Initially the angle sensor, PVC controller and EC were bad. Also the throttle control would not work. After replacing the angle sensor, PVC controller and EC all I have is the error code saying the EC and PVC controller are not communicating. The throttle control still doesn’t function. I am...
  4. Price

    1995 John Deere 490E PVC and EC Not Communicating

    I have replaced both the EC and PVC within 1 month of each other. The only codes I have are 27 coming from EC, which I don’t see in my manual, and code 20 from PVC which shows the two are not communicating. I checked the harness between the EC and PVC and it checked good. Nothing has been...
  5. Price

    1995 John Deere 490E Angle Sensor Question

    Checked the EC to PVC harness and I had continuity. Cleaned connectors, reconnected and still had same result, code 20 on PVC and 27 on EC. Both of these computers are new. The key has not been turned on while plugging/unplugging any sensor so there should not be a reason they are bad unless...
  6. Price

    1995 John Deere 490E Angle Sensor Question

    Installed engine controller. The EC shows code 27 which I can’t find in the manual. The PVC shows code 20 which is the PVC and the EC are not communicating. I am going to check the harness this afternoon. The machine seems to run ok. I don’t have throttle control and the propel speed in...
  7. Price

    1995 John Deere 490E Angle Sensor Question

    I replaced the PVC and the machine ran better but not perfect. The PVC is showing code 22 which is the hydraulic pump control not performing correctly. Manual said it could be the angle sensor, pump displacement solenoid valve, PVC or wiring. Angle sensor and solenoid valves checked ok. PVC...
  8. Price

    1995 John Deere 490E Angle Sensor Question

    Thanks. I have changed the angle sensor earlier on and set it at 4.4 volts. I am assuming then this was the 5 volt sensor.
  9. Price

    1995 John Deere 490E Angle Sensor Question

    I unplugged the angle sensor, pressure sensor and dp sensor. Turned key on and no light on PVC. Checked fuses again, they were good. I had found an old PVC in cab when I had bought machine so I cleaned the connection and installed it. Turned key on and light came on. It showed the...
  10. Price

    1995 John Deere 490E Angle Sensor Question

    Thanks again! If I can’t get PVC to come back on then will try new one I guess. I don’t think we unplugged or plugged the EC Motor in with key on but with all the checking and probing it could have happened. I didn’t see that about the EC Motor but I saw it about the EC I’m thinking.
  11. Price

    1995 John Deere 490E Angle Sensor Question

    Thanks! I will double check the ground and power to PVC by backprobing. I was able to ground to cab and check the fuses again, all were at 24v, either on the left side of fuse or the right. When I checked continuity on EC Motor and the EC Motor sensor, one of the wires didn’t pass the test...
  12. Price

    1995 John Deere 490E Angle Sensor Question

    So I checked the two fusible links that are in the battery compartment by removing battery cables and then checking the links visibly and by continuity. I reinstalled battery cables and went to look at codes again and the PVC is not responding and the EC is flashing 4 then 5. The same place I...
  13. Price

    1995 John Deere 490E Angle Sensor Question

    Update...replaced pressure sensor with no change. Error code (28) still shows pressure sensor not pugged in or bad. Checked harness and had continuity and 5 volts. So...I operated the machine for about an hour. I dug up two large oak stumps and machine did fair. The travel in turtle may or...
  14. Price

    1995 John Deere 490E Angle Sensor Question

    Thanks for the reading material! The code I was getting on the PVC was 28 which relates to the pressure sensor (P). The wiring checked ok. Since I don’t know how to check the P sensor I ordered a new one. Has not come in yet. When I ran the machine last time the pvc shut off after running...
  15. Price

    1995 John Deere 490E Angle Sensor Question

    Also I have read in a post about angle sensor being adjusted at max swash angle. Is that with boom down, arm extended and bucket curled in with bottom flat on ground?
  16. Price

    1995 John Deere 490E Angle Sensor Question

    I don't see anything in manual about a 5 volt reference circuit. I don't understand what that is.
  17. Price

    1995 John Deere 490E Angle Sensor Question

    The resistor was burnt and serial number is above 25000.
  18. Price

    JD 490E hydraulic pump conversion HPV091DS

    So I have a 490e and I am considering this kit. Are you still happy with it?
  19. Price

    1995 John Deere 490E Angle Sensor Question

    Update...I have changed the fuses on the left side of panel. All fuses have power but I am not able to ground in cab and get 24 v at fuses. Usually about 18 v. If I run a wire from battery ground and check fuses then I have 24v. I removed the PVC and put a new resistor in. Reinstalled the...
  20. Price

    1995 John Deere 490E Angle Sensor Question

    I will double check but I am pretty sure there is a 3 amp fuse in F7. I will get a 1 amp. All the fuses were showing voltage. So remove harness and check for power to PVC. I am assuming manual has diagram showing location of power on the harness connector. The ground is the mounting...
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