Chain Drive Motor with Chain that has wobbled off the drive sprocket

Top of Motor showing how the drive sprocket is damaged. Black metal grindings are visible under the sprocket hinting at how and way the chain slipped off.

Top view of broken gear assembly. The sprocket sleeve has been worn away and will create chain slack during operation and thus throw the chain off and cause your door not to open / close automatically.

Garage door Opener repaired and working as designed.

Technician holding broken sprocket / gear assembly

Brand new Gear / Sprocket Assembly (gear kit) – showing how true and undamaged the metal is.

Garage door Opener repaired and working as designed.