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  1. #1
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    Dec 2012
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    Grand Junction, Co.
    Tractor
    MF 135

    Default MF 135 Power Steering leak from top of column

    Hello everyone, have searched this site for info on P/S leak but havn't found much information. Hope I'm not repeating someone else question. I just bought a 1965 MF 135 tractor with a gas engine. Was told the tractor hasn't been run for more than 10 years. Hoping to do a good restore on it.
    Got it running with very little work, but no power asst. on steering. Filled P/S pump, and all the oil got pumped out of a litle vent hole in top of steering column. Pulled column and replaced o ring and seal, as soon as I started the engine, seal popped and started leaking again even before I could turn the steering wheel.

    Pulled the return line at pump, good flow coming back to pump, pulled control valve, can't see any visible cause in valve. Anyone know what I should look for next. Thanks for the help in advance.

    This tractor does not have seprate hyd rams at each front wheel, the asst. ram is tied into the back of the steering gear. Thanks. Pat

  2. #2
    Super Star Member murphy1244's Avatar
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    Nov 2011
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    16,396
    Location
    Ohio
    Tractor
    Kioti DK 40-Massey ferguson 135-Ventrac 4500 Diesel

    Default Re: MF 135 Power Steering leak from top of column

    Murph ------------

  3. #3
    New Member
    Join Date
    Dec 2012
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    7
    Location
    Grand Junction, Co.
    Tractor
    MF 135

    Default Re: MF 135 Power Steering leak from top of column

    Thank You.
    Last edited by gjpat1; 12-10-2012 at 05:16 PM. Reason: spelling

  4. #4
    Super Star Member murphy1244's Avatar
    Join Date
    Nov 2011
    Posts
    16,396
    Location
    Ohio
    Tractor
    Kioti DK 40-Massey ferguson 135-Ventrac 4500 Diesel

    Default Re: MF 135 Power Steering leak from top of column

    you may have to rebuild the steering cylinder. Do you have a service manual?
    Murph ------------

  5. #5
    New Member
    Join Date
    Dec 2012
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    Location
    Grand Junction, Co.
    Tractor
    MF 135

    Default Re: MF 135 Power Steering leak from top of column

    Yes, that was the first thing that I bought.

  6. #6
    Elite Member
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    Apr 2012
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    Somewhere USA
    Tractor
    My tractor is an old

    Default

    Quote Originally Posted by gjpat1
    Hello everyone, have searched this site for info on P/S leak but havn't found much information. Hope I'm not repeating someone else question. I just bought a 1965 MF 135 tractor with a gas engine. Was told the tractor hasn't been run for more than 10 years. Hoping to do a good restore on it.
    Got it running with very little work, but no power asst. on steering. Filled P/S pump, and all the oil got pumped out of a litle vent hole in top of steering column. Pulled column and replaced o ring and seal, as soon as I started the engine, seal popped and started leaking again even before I could turn the steering wheel.

    Pulled the return line at pump, good flow coming back to pump, pulled control valve, can't see any visible cause in valve. Anyone know what I should look for next. Thanks for the help in advance.

    This tractor does not have seprate hyd rams at each front wheel, the asst. ram is tied into the back of the steering gear. Thanks. Pat
    Sounds like a bad relief valve in the pump..

  7. #7
    New Member
    Join Date
    Dec 2012
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    7
    Location
    Grand Junction, Co.
    Tractor
    MF 135

    Default Re: MF 135 Power Steering leak from top of column

    Thanks for the information, I have the system drained so I will check the relief valve tonight. Ive attached a pic of the beast the way I found her in the field.
    Attached Thumbnails Attached Thumbnails -dscn4931-jpg  

  8. #8
    New Member
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    Dec 2012
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    7
    Location
    Grand Junction, Co.
    Tractor
    MF 135

    Default Re: MF 135 Power Steering leak from top of column

    Pulled the pump, cleaned and striped it down, unscrewed relief valve but cant get it out. It moves in and out about 1/4 inch but gets stuck. Not sure whats going on, will work on it somemore tomarrow.

  9. #9
    Elite Member
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    My tractor is an old

    Default Re: MF 135 Power Steering leak from top of column

    Quote Originally Posted by gjpat1 View Post
    Pulled the pump, cleaned and striped it down, unscrewed relief valve but cant get it out. It moves in and out about 1/4 inch but gets stuck. Not sure whats going on, will work on it somemore tomarrow.
    The manual says this is not a reusuable part, so it must get damaged when removed. Did you check and clean the filter?

  10. #10
    New Member
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    Dec 2012
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    Location
    Grand Junction, Co.
    Tractor
    MF 135

    Default Re: MF 135 Power Steering leak from top of column

    So the dealer says relief valve obsolete, not available. I guess I'm screwed will have to buy a new pump for $600.00. Yes filter cleaned and OK. Thanks

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