transmission oil pump diagram

[DanCoon]

Hello,

I'm working on a tractor project for a freind. He has a John Deere 2030A. I'm looking for a breakdown / schematic of the relief valve assembly for the transmission oil pump so that I can determine what parts I need. Can someone post one? Any help would be appreciated. Thank you!

 

[Tx Jim]

Are you very familiar with closed-center hyd's? I'll recommend your friend buys a JD 2030 tech manual. Trans pressure control valve is parts key # 27 in 2nd photo. Filter relief valve(parts key #24/3rd photo) can also affect trans pump output along with leaks in the hyd Hi-Lo & pto if so equipped. 2nd photo is from a 2130 which is same a 2030 but 2030 parts photo didn't show the view I wanted to post. Has the trans sump screen been checked for debris?