The bushings took a chisel bit and a little more persuasion. Starting at a 90-degree angle, first dig the bit in and then rotate it to a 45-degree angle and push it out. The other way to get these out if you don't have an air hammer will be using a vice or press and some tubing. You will need to find a piece of tube that fits around the big end of the bushing and a piece that fits up against the small side. Put that contraption in the vise/press and start cranking down. The smaller piece will drive the bushing out of the arm and into the larger piece on the big side.