How do I replace the drive pin on my Oster blender?

I have an Oster blender that is slipping when the container is set onto the base and a blend speed is selected. I believe that the drive pin is worn to the point where the container lifts enough to cause the drive to slip out.

I have located a source to purchase the replacement drive pin. I'd like to know how to remove the existing pin so that I can replace it with a new one.