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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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Discussion Starter #3
Trans pump for jd4040

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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