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41C4220A is a Gear and Sprocket Replacement Kit for use with LiftMaster and Chamberlain Chain Drive Garage Door Openers; manufactured after 1993 only. This comprehensive kit from Action Industries includes all the commonly worn parts in a chain garage door opener’s drive system. Complete Kit Includes: Helical gear and top hat assembly, worm gear, wear bushings, grease, and hardware needed to replace the chain drive gears.
Complete Kit Includes:
Helical gear and top hat assembly
Hardware needed to replace chain drive gears
Chain Drive Garage Door Operator Gear and Sprocket Replacement Kit
For use with LiftMaster and Chamberlain openers manufactured after 1993
Easy to install: no need to disassemble the output shaft assembly, and spur gear is already mounted on the new output shaft
Includes the most commonly worn parts on chain drive openers