Some units will actually reconnect themselves but this is not typically the case.
How to get garage door roller back on track.
Open up the track with pliers.
The roller should smoothly move up and down in the track.
However it s not guaranteed that the roller will stay there no matter what.
This makes it impossible to replace a garage door roller without unbolting the hinge that holds the roller from the door panels.
You need to check the release handle and make sure that it is on the track.
After troubleshooting the tracks to find the problem you can now get to work putting the rollers back on track.
Now you will be able to open the door manually.
Detach the door from the automatic opener by pulling the overhead string to disengage the opener.
The roller has a stem that fits into a bracket sleeve while the roller itself fits into a track.
Raise and lower the door manually to ensure it is operating properly.
Open the door partially to move the wheels to the point where they are jumping off the track.
The point where the roller is nearest the track is probably the point where it jumped the track.
Locate where the roller popped out of the track.
The next step is to go to the inside of the garage door.
It is relatively simple to fix a garage door that has derailed.
Set the roller back in the track.
If simply hitting the button does not work you will have to take more action.
The garage door track curves up at the bottom to hold the wheel in place.
Lift the garage door so the roller and the length of track you bent are lined up again.
Use a rubber mallet to tap the edge of the roller back into the track.
Remove the locking pliers.
Hit the end of the roller in the hinge with a hammer to push it back into place.
Make sure the roller is in the center of the track.
Locate where the rollers are jumping off the track.
If this doesn t work proceed to the next step.
Similarly if a roller pops out of the track the repair is to uninstall the hinge first then tip the roller wheel into the track.
Now take the pliers and pry open the track.
Open the door while holding the roller against the track.
Once you have located the position use locking pliers to hold the door open by clamping them on one end of the track.