041C4220A is a Chain Drive Gear and Sprocket Replacement Kit. For use with various LiftMaster® and Chamberlain® Chain Drive Garage Door Openers; manufactured after 1993 only. Complete kit includes: Helical gear and top hat assembly, worm gear, wear bushings, grease, and hardware needed to replace the chain drive gears. Check the owner's manual or replacement parts diagram for specific part information before ordering to ensure compatibility.
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