Debris in Hydraulic Suction Screen (Powershift Trans, 4240 Tractor)
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Thread: Debris in Hydraulic Suction Screen (Powershift Trans, 4240 Tractor)

  1. Top | #1

    Join Date
    Jul 2016
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    11-16-2017 @ 08:07 AM
    Mille Lacs, MN
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    Debris in Hydraulic Suction Screen (Powershift Trans, 4240 Tractor)


    I did a whole-system fluid and filter replacement yesterday on my 4240 hydraulic system.
    When removing and inspecting the transmission oil suction screen, I observed what looks like clutch/disc material on it.

    (See attached pictures).

    A note:

    My "park" does not function- which needs to be another forum thread all-together- so I have been using the brake pedal excessively when not on level ground.

    Does this look like transmission clutch material? Brake material? How about the quantity/amount?

    Most debris was between 1/32" and 1/8", but some was larger- 3/16"-1/4" and even one piece was 3/8"

    Any opinions would be appreciated.

    Attached Thumbnails Attached Thumbnails Suction_03.JPG   Suction_04.JPG   Suction_01.JPG   Suction_02.JPG  
    BigJim55 likes this.

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  3. Top | #2

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    Oct 2014
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    Yesterday @ 12:44 PM
    Coyote Flats,Texas
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    I've seen screens that had much more debris on them than one pictured. How long since sump screen has been cleaned. Does PS trans shift into all speeds correctly? On subject of "no park" check to see if park control cable is seized from rust/dirt.

  4. Top | #3

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    11-09-2019 @ 06:07 AM
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    The debris appears to be clutch material and not brake material. The quantity is pretty minimal. I assume you don't know any past history if any transmission clutches have been repaired? Could be remnants of previous failure or the beginning of a new one. I would recommend cleaning debris and reassembling rather than random disassembly and maybe not find anything. If there is slippage in any of the gears, then it may be worth tearing down after proper pressure testing to confirm any problems.
    THe park issue could be linkage wear or adjustment issues, or could be internal problems. I assume this is a cab tractor? If proper operation can't be gotten by repairing and adjusting linkage and cables, you will need to remove transmission top cover to inspect park pawl. Cab floor can be removed for access to transmission cover or cab can be removed.
    DRobinson likes this.

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