Garage Door Broken Sprocket

If the gear and sprocket assembly breaks the motor runs but the door won t move.
Garage door broken sprocket. This diy repair guide explains how to replace the gear and sprocket assembly on a chain drive garage door opener. Chain drive garage door openers have a sprocket that is attached at the top of the motor. One of the most common repairs on a liftmaster garage door opener is a broken gear sprocket. This gear and sprocket assembly is compatible with various chain drive garage door openers.
Helical gear and top hat assembly worm gear wear bushings grease and hardware needed to replace the chain drive gears. This is the part that connects the motor to the chain or belt. After several years the garage door springs become weaker causing more stress on this particular part causing it to fail and wear out.