To replace the rollers on a sliding glass window you can follow these steps; Identify the rollers; remove the roller assembly from the door frame to examine its characteristics. Take note of details, like the number of wheels and any dimples or bump cutouts. How it installs in the door frame. Get replacement rollers; Purchase rollers that match the characteristics you identified earlier. It’s important to ensure a fit even though many rollers are generic and used by door manufacturers. Remove the rollers; Loosen the roller screw and take out the rollers from the door. Install the rollers; Align the holes on the rollers with those at the bottom of the door insert them carefully and then secure them with roller screws. Make sure that they spin smoothly before re-installing your sliding glass door. Clean up your track; Before putting your door clean its track thoroughly for operation. Use a vacuum cleaner to remove any dirt or debris and then wipe down the track with a cloth if needed. You may also consider applying some lubricant to help your sliders or channels move along smoothly. Following these steps should assist you in replacing your sliding glass window rollers. If you encounter any difficulties, along this process it might be beneficial to seek assistance.