41A3589-3 41A3589-12 Garage Door Opener Drive Belt 235" for LiftMaster 1270 1280 1280R, Chamberlain 8100 8200, Craftsman Belt-Drive Opener - 7 FT Door DC93-00634C The shift actuator controls motor

The shift actuator controls motor functions

Each assembly includes one roller wheel

and WF45H series

indicating the idler pulley bearing has seized or worn thin

41A3589-3 41A3589-12 Garage Door Opener Drive Belt 235" for LiftMaster 1270 1280 1280R, Chamberlain 8100 8200, Craftsman Belt-Drive Opener - 7 FT Door DC93-00634C The shift actuator controls motor41A3589 3 41A3589 12 Garage Door Opener Drive Belt (235") Key Features Steel Reinforced Rubber: Manufactured with high strength internal steel cords encased in a durable rubber compound to prevent stretching, fraying, and snapping under the high torque loads of heavy garage doors. Precision Molded Teeth: Engineered with a specific tooth profile designed to mesh perfectly with the drive sprocket, ensuring silent operation and preventing the "slipping"