Some of you may have read or commented about my recent attempt to reseal my power steering pump on my 81 W123 300D a few weeks ago. After some rookie mistakes and some help from some of you, I got it done and the pump is no longer leaking. In the process of resealing my pump I also decided to flush out the old ATF and upgrade to enhanced power steering fluid. About a week later I checked the power steering fluid to see how the levels were and to make sure it wasn't still leaking. The good news is that the pump is not leaking, the bad news is that the new power steering fluid is already dark brown and dirty. So... I'm assuming I didn't get all the air out of the system and I probably didn't get all of the old ATF out either. I'm going to try to flush it out again this weekend and put in some more PS fluid. I just wanted to see if anyone had any thoughts on this. Does this sound like the right plan or am I missing something?

Also, do I need to replace the filter? I put in a brand new filter last week but is it now contaminated or can I reuse it? Can I rinse out the filter with water or is this a bad idea? Sorry, for asking questions that might seem incredibly obvious to most of you, I'm new at this and I'm learning.