A sliding patio door should open and close with ease, sliding along its installed track without sticking. Rollers along the bottom of the door ensure this smooth action. General cleaning should provide enough maintenance to keep the rollers running without difficulty, but sometimes the rollers may break and a replacement may be necessary. Fortunately, replacing the rollers is a simple and quick task, using simple tools and replacement parts found at most home improvement stores.
Adjust the existing rollers on the bottom of the sliding patio door, raising them so that you can remove the door from its track. Raise the wheels in the roller housing by turning the adjustment screw counterclockwise, using a Phillips-head screwdriver. The adjustment screw is on either the bottom or side of the sliding door’s frame near the roller. Adjust both rollers so that the wheels are as high in the frame as possible.
Slide the patio door toward the centre of the door frame for easy access to both sides of the door.
Lift the door within the door frame until the wheels clear the bottom track guide with the aid of a helper to keep the door from falling. Tilt the bottom of the door toward you slightly so that the top of the door slides down out of the top track guide. Set the door flat on the ground.
Remove the screw holding the rollers in place on the bottom of the sliding door, using a Phillips-head screwdriver. Remove any screws on the bottom or side of the door frame holding the bottom of the frame in place. Remove the bottom of the frame to gain full access to the rollers.
Remove the rollers from the door unit and install the replacement rollers. Screw the replacement rollers into the bottom of the door unit, and replace the bottom of the unit, screwing it securely shut. Adjust the rollers during the installation, using the adjustment screws. Set the rollers to retract the wheels fully into the door housing.
Place the door back into the track of the door housing. Lift the top of the door into the top track guide of the door frame. Move the bottom of the door forward, over the edge of the bottom track, and lower it into place so that the wheels are in the lower track of the door housing.
Adjust the roller adjustment screw to extend the wheels as much as possible. Extend the wheels to the point where the door runs smoothly within the tracks of the door-housing unit without the wheels popping out.