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Instructional Video on how to change gear kit
Replacement gear kit for all Liftmaster, Chamberlain and Sears-Craftsman
chain drive garage door openers for units from 1993 to present
(includes plastic gears, shaft, and metal drive gear) 41C4220
chain drive garage door openers for units from 1993 to present
(includes plastic gears, shaft, and metal drive gear) 41C4220
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