The LiftMaster 41K4554 Chain Assembly is a genuine OEM replacement part engineered for chain-drive LiftMaster operators configured for a 12-foot door. This assembly transmits power from the opener’s drive sprocket to the trolley along the rail, restoring smooth, dependable travel when a stretched or worn chain causes hesitation, noise, or misalignment. It is intended for systems specifically calling out 41K4554 in their parts list and is commonly used in tall residential or light commercial sectional door applications that utilize a 12-foot rail configuration.
Use this chain assembly only on compatible LiftMaster chain-drive models that specify it by part number; it is not for belt-drive units or rails intended for different door heights. For installation, disconnect power, place the opener in manual release, relieve chain tension, route and connect the new chain per the opener’s service manual, set correct tension, and reprogram open/close travel limits and force. After replacement, test the safety reversal system and verify photo-eye operation according to UL 325 guidelines. Choosing the 41K4554 helps ensure proper fit and performance with LiftMaster chain-drive garage door openers designed for a 12-foot door, supporting reliable operation and long-term service.
Compatible with LiftMaster chain drive 12' models