How to Replace L-Trac Rollers
Remove the three screws on the underside of the trackball with a Phillips Screw Driver. One screw is located under the Service Label.
Remove the ball and take off the top half of the trackball case then remove the three current rollers from their holders by simply pulling on them.
Next apply a small amount of grease to end of each roller and then slide on a brown bearing. Make sure the nose of the bearing is facing toward the contact points of the roller.
Once this is completed with all three rollers insert them into each holder. Note that the long part of the brown bearing goes downward in the holder and be sure to press down on each bearing to make sure they are completely seated.
Lastly place the ball on the new rollers and put the top half of the case back on the bottom half and re-screw the three screw back on. Make sure not to over tighten the screws.