Unplug the garage door opener.
How to replace chamberlain garage door opener gear.
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.
Put a thin layer of the grease included in the kit on the gear.
With the gears back in place tighten the chain as directed in your owner s manual.
This turns the chain and moves the door.
This turns the chain and moves the door.
Replace the cover on the garage door opener plug it back in and start enjoying your now functioning garage door opener.
Lower the motor unit down.
Install the new gear and sprocket.
The most common issue that occurs is when the ridges in the gear wear out because the gear lubrication has evaporated.
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.
Use a step ladder to access the garage door opener s power cord and motor unit.