The LiftMaster 41A3261-1 Dual Gear and Sprocket Assembly is a genuine OEM drive component for select LiftMaster chain-drive garage door openers. It replaces the upper drive assembly that couples the motor to the chain and trolley, restoring reliable door travel when the original gear or sprocket is worn, stripped, or noisy. Designed to match factory specifications, this dual-gear sprocket assembly maintains proper chain engagement and alignment for consistent operation in residential garage door opener applications.
This replacement part fits specific LiftMaster, Chamberlain, and Sears Craftsman chain-drive models that are engineered for the 41A3261-1 assembly; confirm compatibility by referencing your opener’s model number and parts diagram on the motor head or in the manufacturer’s documentation. Installation is mechanical: unplug power, remove the opener cover, release chain tension, swap the assembly, then re-tension the chain and verify smooth travel. No programming is required, though travel and force limits should be checked and adjusted per the owner’s manual. Not for belt-drive, screw-drive, or wall-mount jackshaft openers. Always follow manufacturer safety instructions during service.
Compatible with LiftMaster 1246, 1246R, 1256, 1256R, 1346 and 1356 models