looking into replacing my o ring for the power steering but im bit confuse. when turning i dont hear anything, i also dont see any air bubbles in my power steering fluid but i do see residue around where (circle #2). if its not my o-ring, what is causing the power steering fluid residue around (circle 2)
what part number is circle #1
what part number is circle #3

***picture below are not mines but just where/how it looks like***