Heavy Equipment Forums Heavy Equipment Community

jd 790e speed sensor

rich stansell ยท 2024-10-23 11:25

what should the vac range be for the speed sensor (mounted on hydraulic pump)?

Replies5
  1. #1mg23612024-10-23 12:20

    Welcome to HEF Rich ! Unfortunately, there is no published specification for that sensor in the Deere manuals. Maybe one of the guys with access to the Hitachi equivalent manuals has that spec.

  2. #2rich stansell2024-10-25 11:06

    TU im getting a steady 1vac with engine speed changes. Changed out speed sensor with a new one and got the same results. any ideas on how that could happen?

  3. #3mg23612024-10-25 12:02

    Measure the sensor using the Hertz measurement, not AC voltage. See what you get with the rpm change.

  4. #4rich stansell2024-10-25 14:45

    TU Will give it a try. May need to get a hertz meter though. I see the advantage of measuring hertz.

  5. #5AristoTruckTech2024-10-26 03:00

    I sent you a private message.