


Door Closer
Question 1: How do I separate the elbow on this door closer? The joints at the elbow and where it connects to the door jamb are smooth with no screws or bolts, and the end that connects to the door has a bolt connecting it to the valve, but the arm will not lift off when I remove it. Question 2: What is this piece on the jamb end in the third picture? I've been Googling for longer than I want to admit and I can't find a single mention or picture of this piece on any kind of door closer. I even tried a Google lens search to no avail.