You can get by without any specialty tools, but the time they will save makes me want to tell you to get a seal driver. You can make them out of pvc and abs pipe and pipe connectors, used with radiator clamps. One thing that may surprise you is how much force is required to get slider to knock the bushing out of the tube and get the whole thing apart. Did you try cleaning the dirt out of the deal with photo film, a business card, or heavy grease?