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Case 780 Restore

Discussion in 'Other Earthmoving Equipment' started by James Madigan, Dec 7, 2021.

  1. Kevin Case 780

    Kevin Case 780 New Member

    Joined:
    May 29, 2022
    Messages:
    1
    Location:
    Picton ON
    I am working on a case 780, pulled brake chambers and master cylinders one of which was dry. Sound familiar?
    I am waiting for my FD-8832 masters to arrive tomorrow. Can you give me some details on pulling the wheel and brake drum to see if wheel cylinder is leaking. Also where did you get the rebuild kits and part numbers for the wheel cylinders? Thanks for any help that you could give!
     
  2. Tinkerer

    Tinkerer Senior Member

    Joined:
    May 21, 2009
    Messages:
    7,835
    Location:
    The shore of the illinois river USA
    James Madigan hasn't logged in since last May. I doubt that he will read this anytime soon.
    Try sending him a Private Message.
    HEF will create and send him an email that he has a PM here.
     
    Gary Layton likes this.
  3. James Madigan

    James Madigan Member

    Joined:
    Sep 30, 2021
    Messages:
    16
    Location:
    Lake Ariel PA USA
    I got the wheel cylinder kits from Case
    about $75 apiece. To pull the wheel and get to brake drum you need to take off the planetary gear sets. If you have a manual it will tell you how. If not let me know maybe i can get you some manual pages covering it.Its a job but not the worst.
     
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  4. Gary Layton

    Gary Layton Active Member

    Joined:
    Mar 9, 2021
    Messages:
    27
    Location:
    Georgia
    James Madigan, you are a champ. Cool that you shared your fix-up process and then came back online to help the latest fellow out.
     
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  5. James Madigan

    James Madigan Member

    Joined:
    Sep 30, 2021
    Messages:
    16
    Location:
    Lake Ariel PA USA
    Thanks Gary. I got a ? anyone know about the loader Hydraulic Main Relief valve.Mine leaks at different times, sometimes after i shut the machine down. Sometimes when im operating for awhile.
     
  6. Tinkerer

    Tinkerer Senior Member

    Joined:
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    Messages:
    7,835
    Location:
    The shore of the illinois river USA
    The parts book will reveal most of what you need to know.
    Be very careful about not changing the setting adjuster if you take the valve apart. releef.png
     
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  7. James Madigan

    James Madigan Member

    Joined:
    Sep 30, 2021
    Messages:
    16
    Location:
    Lake Ariel PA USA
  8. Tinkerer

    Tinkerer Senior Member

    Joined:
    May 21, 2009
    Messages:
    7,835
    Location:
    The shore of the illinois river USA
    Your service manual is showing it in the valve body to explain the flow paths of it.
    I don't know what model or production year your 780 was made.
    So, it is not possible for me to offer you any more help.
    You need to find the correct parts book for your machine if you want to get the "O" rings that are leaking.
     
    James Madigan likes this.