Step 10 - Use a flatblade screwdriver to ease the bushing out. There isn't much force needed and you can do this with your fingernails if you have any
Step 11 - Once again with the flatblade screwdriver, run it around the rubber bushing to make sure it's not stuck to the metal casing
Step 12 - Now work round the outside of the rubber pushing the bush out a little at a time
Step 13 - This is the old bushing all removed. Apart from a little dirt it isn't too bad, the metal rod has got some surface rust but nothing too severe.
Compare it to the shiny new kit in picture 2 and you get an idea of how it has worn.