How to Replace 15-104

Greetings. To remove and install a new friction shoe, you will need to remove the sashes and the jamb liners, then slide the friction shoes out of the jamb tracks. Let me know if you have any other questions. 

Taking apart the window is no easy feat, and varies from window to window; you may want to contact a local pro to do the job for you. There is an alternative option: heat the track up a bit so you can squeeze the new shoe in. This is also not the easiest task and you risk damaging your window, but it's the only other way. 

With a heat gun or hair dryer, heat up the track near where the old shoe is sitting. When the track is soft enough you will be able to remove the old shoe and install the new one. If you choose this method, be extremely careful not to over heat and damage the track. If you damage the track, your window will no longer function.