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  1. #1
    New Member
    Join Date
    Dec 2011
    Posts
    3
    Tractor
    Case 580 CK

    Default Need to rebuild hydraulic pump on 580 CK

    I've been working on the hydraulics of an old Case 580 CK backhoe loader that I inherited (about 1970 vintage). I've replaced the seals in 3 leaking cylinders and replaced 23 hydraulic hoses. The hydraulic oil looked like chocolate milk, so I drained out all I could and refilled with 50/50 diesel/hydraulic fluid mix. I cranked it up and everything was looking good, until the hydraulic pump started spraying fluid everywhere . . . I think the diesel must have dissolved the gunk that was keeping the pump shaft sealed!

    So, I've taken off the pump and taken it apart . . . it doesn't look too bad, but it needs a new shaft seal. I also need all the other gaskets and o-rings to go with it. I've searched the internet, but I cannot find any rebuild kits for this pump. I can find a new aftermarket pump for about $400 . . . is this my only choice?

  2. #2
    Veteran Member
    Join Date
    Jan 2009
    Posts
    2,192
    Location
    Carroll, Ohio
    Tractor
    Massey 180 Diesel

    Default Re: Need to rebuild hydraulic pump on 580 CK

    Case probably has kits for it. CASE

    Place youe cursor on "parts & service". A drop down menu will appear.

    Select "search for parts".

    Enter 580CK in the model space, and hit enter. You will need to determine which loader/backhoe model you have, and the serial number of the unit, as it looks like they used more than several pumps, throughout production.

    Just a couple I looked at, they have kits, or reman'd pumps.

  3. #3
    Veteran Member
    Join Date
    Jan 2009
    Posts
    2,192
    Location
    Carroll, Ohio
    Tractor
    Massey 180 Diesel

    Default Re: Need to rebuild hydraulic pump on 580 CK

    Unless this one would fit. D48950 Case Backhoe Hydraulic Pump 480B 480C 580B 580C 580F D53690 New | eBay

    Price looks to be a little more than a seal kit for the model pumps used on most 580CK's.

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