Put the new bushing on top of the "ball" like part, put the linkage with the hole for the bushing on top with the hole lined up with the new bushing. Take a socket that is just large enough for the bushing to fit into, and put it on top of the linkage with the hole. Now press it all together with large pliers. Once it presses together the bushing will be unharmed as it sank into the socket. It is alot easier if you have a second set of hands, but one person can do it. A friend of mine tac welded a socket to one half of a set of pliers so he has the perfect tool. Hope this makes sense.