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  1. #1
    New Member
    Join Date
    May 2001
    Posts
    22
    Location
    Lewisberry, PA
    Tractor
    PT 425, 154 Cub LowBoy

    Default Intermittent treadle failure

    The 425 treadle valve seems to loose position during operation. Depressing the pedal to go forward or reverse, motion is lost.
    It can be reset by turning off the engine and then re-starting the engine.
    Has anyone had this problem or any suggestions to remedy this problem?

  2. #2
    Epic Contributor MossRoad's Avatar
    Join Date
    Aug 2001
    Posts
    26,192
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: Intermittent treadle failure

    Is your treadle hydraulic or cable operated?
    MossRoad

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  3. #3
    Veteran Member SpringHollow's Avatar
    Join Date
    Dec 2006
    Posts
    1,844
    Location
    South of Rochester, NY
    Tractor
    Power Trac 1850, NH 2120

    Default Re: Intermittent treadle failure

    Would air in the lines be possibly causing this?

    Is it possible that there is a piece of something that pressure makes block a port but when you turn off the engine, it falls off?

    Does it work properly right away or does the oil have to cool down?

    Ken
    PT1850, mini hoe, grapple, stump grinder, brush hog

    http://www.usadiscountgenerators.com...T1850Home.html

  4. #4
    Epic Contributor MossRoad's Avatar
    Join Date
    Aug 2001
    Posts
    26,192
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: Intermittent treadle failure

    Yeah, that's why I'm trying to ask if the treadle is hydraulic or cable. If it's hydraulic, purge the pump and see what happens.
    MossRoad

    Click On My Little Tractor
    To See Pictures And Videos
    Of It In Action!!!


  5. #5
    New Member
    Join Date
    May 2001
    Posts
    22
    Location
    Lewisberry, PA
    Tractor
    PT 425, 154 Cub LowBoy

    Default Re: Intermittent treadle failure

    The treadle is hydraulic.
    After going through some troubleshooting I called Power-Trac.
    I spoke with Terry at Power-Trac and he mentioned it may be a scratch on the variable pump piston.
    At this point in time I'll muddle through winter and address the problem if it continues to get worse.

  6. #6
    Epic Contributor MossRoad's Avatar
    Join Date
    Aug 2001
    Posts
    26,192
    Location
    South Bend, Indiana (near)
    Tractor
    Power Trac PT425 2001 Model Year

    Default Re: Intermittent treadle failure

    Ouch!
    MossRoad

    Click On My Little Tractor
    To See Pictures And Videos
    Of It In Action!!!


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