I actually just installed mine this past weekend. First you need to take the little horseshoe-shaped clip off on the underside. I just used my fingernails. Then I hammered the pin from underneath up until i could get the pin off. Take notice of how the spring is inserted (the side that’s bent pushes against the footpeg, and the other straight side sticks into a small hole in the casing. This should all be pretty obvious once you look at it.) Then just hammer the pin back down, and put the clip back on. Took all of five minutes.