Remove the gear and sprocket assembly.
How to replace chamberlain garage door opener gear.
Put a thin layer of the grease included in the kit on the gear.
Install the new gear and sprocket.
Unplug the garage door opener.
Lower the motor unit down.
Replace the cover on the garage door opener plug it back in and start enjoying your now functioning garage door opener.
This turns the chain and moves the door.
In most chamberlain liftmaster and sears openers a motor turns the worm gear and drive shaft inside the opener which rotates the sprocket attached to the top of the drive shaft.
The most common issue that occurs is when the ridges in the gear wear out because the gear lubrication has evaporated.
This turns the chain and moves the door.
In most chamberlain liftmaster and sears openers a motor turns the worm gear and drive shaft inside the opener which rotates the sprocket attached to the top of the drive shaft.
Remove the chain and cable assembly.