Tighten the bolts on.
Garage door chain drive fix.
If the motor hums but the chain doesn t move that indicates a problem with the motor.
Start by checking the things below to see if it is the problem lies with the garage door.
Examine the metal tracks on the door for dents or bumps.
This video from sears partsdirect shows how to replace the chain and cable assembly on a chain drive garage door opener.
Press the remote or the wall mounted start switch listen to the motor and watch the movement of the chain.
Located along the rail the chain an.
Sprocket is at the end of the opener rail closest to the garage door opening.
If you are not confident in your ability to diagnose the problem call a local garage door service company.
The chain wraps around this sprocket as well as the gear and sprocket at the motor.
If there are some you can use a wood block and your hammer to fix the dents.