The idler/third arm had a lot of play in it and needed to be rebuilt. Two screws below, and one larger screw above hold it onto the frame. A small pin holds the larger pin in place. I used a narrow center punch and a hammer to gently remove the small pin. Then, using the same punch, I hammered through the cap on one end, forcing the opposite end cap out. Reversing this operation got the second cap off, as well as the large internal pin.