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HELP! My Fisher wont do down or side to side

Discussion in 'Truck & Equipment Repair' started by bschurr, Nov 8, 2012.

  1. bschurr

    bschurr Member
    Messages: 60

    Hooked up my Fisher MM plow last night in hopes of dealing with the 6 inches of wet snow that we just received in Northern NJ. Right after install everything worked fine but as soon as I headed up the driveway, the plow refused to go down or turn right or left. The hydraulics work only to raise the plow and nothing else. Lights work and the pump works but I can not figure out why it wont lower or turn.

    Any help/input is appreciated.
    Thanks!
     
  2. unhcp

    unhcp PlowSite.com Addict
    Messages: 1,243

    check your electrical connections, make sure the pump has fluid, is the solenoid clicking?
     
  3. bschurr

    bschurr Member
    Messages: 60

    Thanks - fluid level is good and solenoid is clicking...

    It was working and then 2 minutes later - NUTHIN!
    I am baffled.
     
  4. unhcp

    unhcp PlowSite.com Addict
    Messages: 1,243

    hmm check your solenoid connections, does your controller light up red?

    I am wondering if a valve is stuck? or the pump is going
     
  5. jasonv

    jasonv PlowSite.com Addict
    from kannada
    Messages: 1,114

    Did you flush/clean the pump this year? If there is any water in the system that froze, it would be like a crystal dust in the fluid and will plug the screens in the pump.
     
  6. leigh

    leigh PlowSite.com Addict
    from CT
    Messages: 1,994

    If everything worked and stopped suddenly it sounds electrical.If pump runs when you try turn plow its got to be a valve problem. Not cold enough for a freeze up.I would guess it's something simple.
     
  7. bschurr

    bschurr Member
    Messages: 60

    Yes - the controller lights up, no I did not flush and clean the pump this year but did last year and used the plow twice since then.

    I agree, it is likely something sooooo simple and probably a bad electrical connection. I was hopeful not to have to start tracing all the wires but I suspect that there is no substitute for all the work associated with the investigation.

    Thanks all for the replies!
     
  8. leigh

    leigh PlowSite.com Addict
    from CT
    Messages: 1,994

    I would check the plugs first.Clean them and pump some diaelectric grease and you'll be good to go! (trying to be optimistic)
     
  9. unhcp

    unhcp PlowSite.com Addict
    Messages: 1,243

    yeah try wiggling the electrical plugs a little, watch your feet!
     
  10. bschurr

    bschurr Member
    Messages: 60

    yup - tried that after the initial faluts...
    Lots of cleaning with electrical contact cleaner, even a little roughing of the contacts with some emory paper - I dont have dielectric grease but will get some & try that.

    And yes, lots of wiggling wires too - all to no avail.

    Tomorrow afternoon I will trace out each wire and see how it goes...
    AAARGH!!!
     
  11. unhcp

    unhcp PlowSite.com Addict
    Messages: 1,243

    Check your ground/battery connections
     
  12. bschurr

    bschurr Member
    Messages: 60

    It turns out that it was the controller - its shot!

    Any leads on an inexpensive replacement?
     
  13. unhcp

    unhcp PlowSite.com Addict
    Messages: 1,243

    Pm me I might have something