21. Remove the plastic retaining ring at the bottom of the mouse, and the small rubber ball will drop out. 22. The cooling shroud could be removed without tools by unscrewing the front retaining ring from the barrel by hand. 23. For now, put the retaining ring on a desk and set the ball inside it so it won't roll away. 24. If you turn your mouse over, you'll see a gray rubber ball held in place by a plastic retaining ring . 25. The shoulder on the outside and the retaining ring also keep the tire in place if the interference fit is lost. 26. The special inside contour of the retaining ring flange covers the retaining ring , which is installed onto the machined pipe end. 27. The retaining ring has to be widened for getting it on the pipe end to snap into the before machined groove. 28. The special inside contour of the retaining ring flange covers the retaining ring, which is installed onto the machined pipe end. 29. The tire cools, and the retaining ring ( a shaped steel bar rolled into a hoop ) is fitted into the groove. 30. Just remove the retaining ring that holds in the little rubber ball and take a look at the rollers inside the mouse.
