Garage Door Chain Drive Fix

If there are some you can use a wood block and your hammer to fix the dents.

Garage door chain drive fix.

If you are not confident in your ability to diagnose the problem call a local garage door service company. Slide the pulley toward the garage door until the chain is stretched tight then move it toward the motor until the middle of the chain touches the upper side of the chain arm. Make sure the tracks are aligned properly. The chain wraps around this sprocket as well as the gear and sprocket at the motor.

Sprocket is at the end of the opener rail closest to the garage door opening. If the motor hums but the chain doesn t move that indicates a problem with the motor. A new front sprocket costs about 150 200 include the labor to install it. Press the remote or the wall mounted start switch listen to the motor and watch the movement of the chain.

This video from sears partsdirect shows how to replace the chain and cable assembly on a chain drive garage door opener. Examine the metal tracks on the door for dents or bumps.