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Case 580sk hydraulic oil in transmission

Discussion in 'Tractor/Loader/Backhoes' started by Elman1, Jul 14, 2019.

  1. Elman1

    Elman1 Active Member

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    I have a case 580 sk hydraulic oil is going into the transmission. Anyone have an idea where it could leak into it at? Transmission is full to the top and leaking out. Must leak out of hydraulics pretty fast. Any information about fixing would be appreciated thanks.
     
  2. 580bob

    580bob Well-Known Member

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    cant happen two separate compartments no connection between two you sure its a 580sk
     
  3. Elman1

    Elman1 Active Member

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    Yes super k fill the hydraulic up run machine everything works ok. Oil soon to low for hydraulic to work. oil leaks out vent on top of diff . Transmission full to top of dip stick.
     
  4. mitch504

    mitch504 Senior Member

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    Did this just suddenly start while running it? I could see if maybe somebody crossed the lines on the oil cooler, or something similar...
     
    Coy Lancaster likes this.
  5. Coy Lancaster

    Coy Lancaster Senior Member

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    I'm thinking like mitch504 if you have had radiator work or cooler work done there could be an issue with crossed hoses. Other than that the hyd. system and the transmission are stand alone systems, even brakes have their own reservoir.
     
  6. Elman1

    Elman1 Active Member

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    Just bought the machine. No leaks very clean. Thought it had a line leaking under platform. All looks good other than oil out the vent. I haven’t thought about cooler. Will have to follow some hoses. Anyone have a diagram of where the hoses and line should go?
     
  7. Tinkerer

    Tinkerer Senior Member

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    You will need to navigate to the different pages to view all the different hose routing.
    Click on the orange BACK TO MANUAL bar to see the main menu.
    At the bottom of the pages there is a small icon that looks like a grid. Click on that to change the menu from a list to a pictorial view.
    Check the hose routing to the filters.
    https://partstore.casece.com/us/par...c02378&sl=EN&currency=#epc::mr100583ar1094372

    menu.png
     
    Last edited: Jul 15, 2019
    Coy Lancaster likes this.
  8. Elman1

    Elman1 Active Member

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  9. Elman1

    Elman1 Active Member

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    I don’t see any hoses that looks moved. The left brake is not working can easily push to the stop. Wouldn’t think it could get much oil through there. Looks like hydraulic oil going through the master cylinders.
     
  10. Tinkerer

    Tinkerer Senior Member

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    The master cylinders require Case HY-Trans oil.
    NO DOT BRAKE FLUID !!
     
  11. Coy Lancaster

    Coy Lancaster Senior Member

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    The 508Es and Ls up to present were the only machines that brake master cyl. refilled off of hyd. system.
     
  12. Tinkerer

    Tinkerer Senior Member

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    Below is the exact way the fluids should be routed to the oil cooler. I would think your problem is there somewhere.
    lines.png Well, you said you just got the machine, probably bought someone else's problem.
    Maybe it isn't a hose (or two) that has been hooked up incorrectly. Most likely is tho !
    Perhaps some dummy has added a hose between the two systems for some unknown reason.
    Remove the screen #15 and see if it is clean. Not really related to your problem but it should be serviced. sucktion.png
     
    Last edited: Jul 17, 2019
    mg2361 likes this.
  13. fpgm04

    fpgm04 Well-Known Member

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    Has there been any damage/leaks and subsequent repair to the one of the tubes in the cooler assembly?

    Keep in mind a way to repair a leaky tube section in a cooler/radiator (not necessarily the best from a cooling perspective), is by bypassing/bridging the leaky tube over to the next closest tube with some creative plumbing and soldering. Essentially eliminating fluid flow to the leaky tube in the cooler.

    The cooler as shown in the pictorial that Tinkerer attached above shows a single cooler assembly with 2 separate cooling circuits. (1 for tranaxle and 1 for hydraulics)

    If there was some past leak or damage, perhaps someone thought they could do some bridging around a leaky tube but instead ended up connecting the 2 different cooler circuits together?
     
  14. Tinkerer

    Tinkerer Senior Member

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    It wouldn't surprise me if one of the cooler sections was damaged or leaking for some reason and someone decided to hook all the hoses to the good section.
     
  15. mitch504

    mitch504 Senior Member

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    I hope Elman1 comes back to tell us what he finds, I am curious, now.
     
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  16. Elman1

    Elman1 Active Member

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    Talk to case tech said he’s sure it the brake cylinder. In trans axel
     
  17. Tinkerer

    Tinkerer Senior Member

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    He is right about that.
    But, the only hydraulic oil the brakes use is what is in the reservoir on top of the master cylinders.
    The fact your hydraulic reservoir gets so low the your hydraulic functions cease to work and at the same time you have oil coming out of the top of the transmission is an entirely different problem.
    By all means repair that left brake. For safety's sake if for no other reason.
     
    Coy Lancaster likes this.
  18. mitch504

    mitch504 Senior Member

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    Yep, there is no way for a superK to put more oil into the tranny through the brake than the 3 or 4 ounces you pour in the master cylinder. there is NO connection between the brakes and the hydraulics on a superK. There IS such a connection on the ones made afterwards. The problem with dealer techs sometimes is that they only work on fairly new stuff.
     
  19. Elman1

    Elman1 Active Member

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  20. Elman1

    Elman1 Active Member

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    My master cylinder doesn’t have anywhere to add oil. I have a hose that connects to the hydraulic line near the filter and another that connects to a hydraulic line. I will have to look again where. But has no hole in the top of plastic container. Also of course two lines to the master cylinders.