Liftmaster-Sears Large Drive Gear is replacement drive gear for all Chamberlain Group (Sears Craftsman, Liftmaster, Master Mechanic, Garage Master) chain and belt drive openers manufactured from 1984 to the present. As well as Wayne Dalton opener models 100 - 320. Special instructions make it fast and easy to change the gear.
Special Quick Change Instructions
All 1/3 Hp, 1/2 Hp, 3/4 Hp Chain and belt drive garage door openers manufactured from 1984 to the present for these manufacturers:
Wayne Dalton models 100-320