10. Using a screwdriver, remove the top retaining ring.
11. Remove the protective cover from the hinge.
12. Remove the top layer of dirty grease (if it is noticeable that dirt has got inside the hinge, then such a hinge will have to be replaced) and apply new grease.
13. Install the lower retaining ring on the new boot.
14. Fill the new boot half full with grease.
15. Install the cover on the hinge until it stops and put the edge of the cover on the seat on the hinge body.
16. Install the top retaining ring.
17. Check the correct installation of the rings and the tightness of the edges of the cap.