MF1643 HST filter Part Number

[Peanie]

Has anyone replaced there HST filter located on the outside of the transmission case. The Manual says to change it and the dealer parts department tells me its a screen and to just clean it. I called Agco and the lady I talked with forwarded the info to their Tech. I also called another dealer and they did have a clue as to what it was either. I;m due for my fifty hour service and need this info to buy the parts I need.
Thanks in advance for any help.