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Fisher XLS wont lift up

Discussion in 'Truck & Equipment Repair' started by kingsr6, Oct 31, 2015.

  1. kingsr6

    kingsr6 Junior Member
    from ON, CAN
    Messages: 19

    I have a Fisher XLS 8-10 blade. All functions work. New plow oil, new hoses. Blade goes L/R and expands and retracts with no issues at all. However when I try to raise the blade it only comes up about 1 inch and stops. Pump is still trying to lift. I can only make it lift full height if I tap the L/R and hold the lift button down. This "jarring" action will slowly lift it up.
    I have tried switching the coils to make sure it wasn't a bad coil. No change still wont lift. I also replaced the SVCV08-20 valve ( which I believe is the raise lower valve) in case it was sticking on or not opening all the way. No Change.
    So I am left with the pump, but if all the other blade actions work perfectly fine could it really be a pump?

    Any other suggestions would be appreciated.
     
  2. 1olddogtwo

    1olddogtwo PlowSite Fanatic
    Messages: 11,511

    It take the most power to lift.

    Need pressure gauge to rule out motor/pump. The ram itself could be bad.

    Take chain off and try and raise
     
  3. kingsr6

    kingsr6 Junior Member
    from ON, CAN
    Messages: 19

    No sign of Ram being bad. No leaks anyway. I will go try it with no chain.
     
  4. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,621

    Is it full of fluid. Check with lift ram all the way down and wings retracted. fluid should be at bottom of fill hole threads.
     
  5. kingsr6

    kingsr6 Junior Member
    from ON, CAN
    Messages: 19

    Yes it full of new fisher plow fluid.
     
  6. kimber750

    kimber750 PlowSite Veteran
    Messages: 3,621

    You can try tightening the quill all the way in. If it raises then there is an issue with the S2 valve. I would still do a pressure test like OldDog suggested but this is a quick test you can try. Just remember to get the plow back down the quill will need to be opened and the plow most likely will drop so stay clear of the blade.
     
  7. kingsr6

    kingsr6 Junior Member
    from ON, CAN
    Messages: 19

    Lift cylinder goes up with no problem once the chain is off.
     
  8. gtmustang00

    gtmustang00 Senior Member
    from Berlin
    Messages: 747

    Check the relief pressures. Adjust if necessary. If you can't achieve proper pressure, replace pump. Don't need as much pressure to angle blade or extend wings.