I know there is a filter in the pan, bolted to the underside of the valve body... I'm unaware of a filter IN the valve body.
I've not had one of these open though, so it's possible.
or are you talking about the thread that discussed, the pan filter getting sucked into the valve body and jamming up things.
yeah, that would not be a good thing...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!