Take a roller to your local hardware store and purchase a replacement.
Replacing old sliding door rollers.
Replace with the new roller and re insert the screws.
You can find replacement patio sliding glass door hardware here.
However if the rollers are worn cracked or bent remove them photo 4 and replace them with a new pair.
Use the wooden block and rubber mallet to gently tap the frame back onto the.
The first step regardless of what kind of door you have is removing the door from the track.
Clean the sliding door track of all dust and debris by using a vacuum cleaner before replacing the door panels on to the track.
Using a hook tool we used a balance hook a bent hanger or needle nosed pliers grip underside of roller housing or roller adjustment screw through side of door and pull out.
Replace the roller screws and use your phillips screwdriver to turn them clockwise until tight.
Replace the roller if the rollers or sliding glass door wheels are full of dirt and debris give them a good cleaning and a few drops of lubricant and see if they spin freely.
Before you can replace your old roller you first need to remove the door panels from the track.
Then if you have a vinyl door unscrew the old rollers and slot in the new ones before screwing them into place.
The rollers are at the top and or at the bottom of the door.
Once removed transfer your door to a flat working space such as a floor and remove the screws from the rollers.
Unscrew the rollers and remove them.
The right way to replace sliding glass door rollers depends on whether you have a vinyl or aluminum door.
Insert the replacement sliding door rollers into the cavity along the bottom of the door.
Insert the new rollers in the door lining up the holes on the rollers with the holes in the bottom of the door insert the new rollers in place.
Always take the roller with you to the hardware store to avoid purchasing the wrong piece.
Make sure the rollers spin sufficiently before re installing your sliding glass door.