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  1. #1
    Gold Member
    Join Date
    Feb 2005
    Posts
    484
    Location
    Decatur, Texas
    Tractor
    2005 Montana 5740C

    Default "O" Ring size needed

    I've got a 2005 5740C and it has been leaking hydraulic fluid for quite some time now. It's leaking hydraulic fluid from the black box under the right side step up, where the lines to the front end loader hook into this black box on one side and the hydraulic lines from the tractor itself hook in on the other side. I changed the O Rings on all lines coming in and going out, about two years ago, because they wewre all leaking, but it's leaking badly again. It's now affecting the raising and lowering of my FEL when I spike hay bales and my power steering too. When I try to put in some more hydraulic fluid, the system won't take much either.

    I already added hydraulic fluid and then bled off the air, but that didn't seem to help much at all. I figure I'll change all those O Rings again, but I need the size of O ring. The manual doesn't give any info regarding much of anything and certainly doesn't give me something like an O Ring size. Any help would be appreciated.
    Green and Silver is better looking than Green and Yellow!!

  2. #2
    Silver Member Texasgreen's Avatar
    Join Date
    Nov 2005
    Posts
    162
    Location
    Baytown,TX
    Tractor
    06 Montana 4940C/R4/FEL arched boom.

    Default

    When was the last time you changed the hydraulic filter under the tractor?
    2006 Montana 4940C

  3. #3
    Gold Member
    Join Date
    Feb 2005
    Posts
    484
    Location
    Decatur, Texas
    Tractor
    2005 Montana 5740C

    Default Re: "O" Ring size needed

    Texasgreen,

    Long story, but I don't have the leak anymore. Filter changed 2 years ago.
    Green and Silver is better looking than Green and Yellow!!

  4. #4
    Veteran Member
    Join Date
    Apr 2011
    Posts
    1,096
    Location
    Erie Pa.
    Tractor
    Montana R4944, Ford Jubilee, Ford 621, Ford 841

    Default Re: "O" Ring size needed

    Quote Originally Posted by Unclebuck257 View Post
    Texasgreen,

    Long story, but I don't have the leak anymore. Filter changed 2 years ago.
    Ok so what is the story! Your killing me.
    Montana R4944
    Ford Jubliee, Ford 841, Ford 621 industrial with FEL & BH

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