The LiftMaster 41A4813 Chain Pulley Bracket is an OEM replacement component for select LiftMaster chain‑drive garage door openers. Positioned at the rail end, this bracket secures the idler pulley that guides and aligns the chain for smooth, reliable travel of the trolley. Replacing a bent, worn, or damaged bracket helps restore proper chain tracking, reduce noise, and maintain consistent door operation. It is designed for use on compatible LiftMaster systems manufactured by The Chamberlain Group and may also appear on equivalent Chamberlain and Craftsman chain‑drive models that specify part 41A4813 in their illustrated parts list.
This part is a direct mechanical swap with no programming required. For installation, disconnect power, place the door in manual mode, relieve chain tension per the opener’s manual, then transfer the pulley and fasteners as directed by the product’s parts diagram. After reassembly, re‑tension the chain according to the manufacturer’s procedure and test safety features. Always verify compatibility by checking your opener model number, rail assembly, and official LiftMaster/Chamberlain documentation for part 41A4813. Common search terms include LiftMaster chain pulley bracket, idler pulley bracket, garage door opener rail bracket, OEM replacement, and residential chain drive part.
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