Hydraulic issue for jd4040
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Thread: Hydraulic issue for jd4040

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    Hydraulic issue for jd4040

    When you unscrew the filter as the tractor runs no oil spills,what does this entail?

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    Sounds as if trans pump stopped pumping or hyd filter relief valve is stuck open. Trans pump drive shaft(key 31) has a history to round off or worse scenario is pump has failed. One can check pump drive shaft by removing 3 pt centerlink attaching bracket then remove hex plug(key 29) start engine to see if shaft turns,if shaft turns then pull shaft to check condition of shaft.
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    Last edited by Tx Jim; 09-20-2018 at 07:44 AM.
    DRobinson likes this.

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    Zebrafive (09-20-2018)

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    Trans pump for jd4040

    Quote Originally Posted by Tx Jim View Post
    Sounds as if trans pump stopped pumping or hyd filter relief valve is stuck open. Trans pump drive shaft(key 31) has a history to round off or worse scenario is pump has failed. One can check pump drive shaft by removing 3 pt centerlink attaching bracket then remove hex plug(key 29) start engine to see if shaft turns,if shaft turns then pull shaft to check condition of shaft.
    Hey
    Thankyou for this guidance,the trans pump you mean is the one in front right?

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    Filter relief valve

    And where exactly is the filter relief valve located?

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    Quote Originally Posted by Musonda View Post
    Hey
    Thankyou for this guidance,the trans pump you mean is the one in front right?

    You're welcome. Trans pump is pictured in photo above. IIRC hyd filter relief valve is key 17 which is located on LH side behind battery
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    Last edited by Tx Jim; 09-20-2018 at 11:38 AM.

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