580B loader & hoe freezing up - Help

Discussion in 'Heavy Equipment & Pavement' started by Mr Ranger, Dec 7, 2002.

  1. Mr Ranger

    Mr Ranger LawnSite Member
    Posts: 6

    When using my Case 580B, the loader and hoe all of the sudden lock up and quit working. Sometimes they will start working in a few minutes other times I have to wait till the next day. I'm thinking that something is wrong with the main preasure relief valve, but not sure. Any Suggestions.


    Thanks
    Mr Ranger
     
  2. coopers

    coopers LawnSite Bronze Member
    Posts: 1,224

    What exactly do you mean it locks up? Like it just won't move, is it similar to when you.... say, have the hoe on the ground and are swinging back and forth to level things out, and you hit a pile of dirt that is too big and the machines almost cuts out because it's too much. Something like that? I could ask my boss, but I won't see him until this Fri. You should go ask your nearest case dealer what the problem might be. Or just ask around, with people that operate case equipment.

    Blake
    WA
     
  3. Mr Ranger

    Mr Ranger LawnSite Member
    Posts: 6

    Nothing will operate, just as if the control levers have been disconnected. Although the tractor it self still runs.

    Mr Ranger
     
  4. coopers

    coopers LawnSite Bronze Member
    Posts: 1,224

    Sorry, can't help you there. I don't have a clue what's wrong.

    Blake
    WA
     
  5. LeoS818

    LeoS818 LawnSite Member
    Posts: 122

    Sounds like the hyrdo pump is goin out.
     
  6. landman

    landman LawnSite Member
    from NJ
    Posts: 110

    Not sure about it but we have a John Deere and there is a celenoid on the hydropump and in cold weather you depress the clutch pedal all the way down and it contacts a switch in which the celenoid disengages the pump so that the motor isn't tring to crank over with the drag of the pump as well. Maybe if your hoe has the same type of set up your celenoid may be going bad and intemintently engages and disengages the pump when it's cold. When it's really cold out hydro fluid is like 3x the thickness as if it was hot. If your pump was going bad it would still operate the machine but when you put it under a load it wouldn't have the power to do the task, but wouldn't just stop. The only other thing I can think of is if there is water or condesation in your system and maybe little pieces of ice are getting trapped in the ports and not allowing the oil to flow through.
     
  7. coopers

    coopers LawnSite Bronze Member
    Posts: 1,224

    Mr. Ranger,

    I was just curious, is your backhoe an x-hoe or standard hoe? What do you use it for? Anyway, hopefully you can get it fixed so you can continue your work! ;)

    Blake
    WA
     
  8. Mr Ranger

    Mr Ranger LawnSite Member
    Posts: 6

    As it turns out, the main preasure relief valve had a broken spring. Spring replaced problem solved.

    Mr Ranger
     
  9. coopers

    coopers LawnSite Bronze Member
    Posts: 1,224

    Good for you! Back in business.

    Blake
    WA
     

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