If you want to do this job. Here is how the pro's do it.
First separate the shafts. The large knurled collar holds the two shafts together. There is a rubber O-ring inside the collar. This slides off over the splines. Very tight fit and will sometimes break on older shafts.
Most c-bearings are rubber mounted. The rubber is just a molded piece that will pry off with a long bar and some work. Determine front and back. Remove. Then place a bearing pull collar around the metal bearing and press bearing off with a press. A large hammer and chisel will work if no press is available.
Install by sliding new bearing assembly over the splines on the shaft. Then drive it on the press portion of the shaft until it seats against the shaft. I use a long driver. Looks like a piece of pipe with a drive ring welded on.
Replace o-ring and thread collar.
To line up the two shafts for re-assembly. The spline will have a "Skipped tooth" line it up with the grease zerk on the outer piece. Push together.