The Genie 18428B.S Chain Assembly 7' is a genuine OEM replacement chain for select Genie chain-drive garage door openers that use a 7' rail assembly. Designed to transfer motion from the opener’s drive sprocket to the trolley, this assembly restores proper door travel when an original chain becomes stretched, noisy, or damaged. It is intended for standard residential applications on compatible Genie chain-drive models and helps maintain smooth, reliable opening and closing performance.
Before purchasing, verify compatibility by checking your opener’s model and rail configuration in the owner’s manual or parts list for part number 18428B.S. Installation typically involves disconnecting power, placing the door in the down position, releasing the emergency disconnect, relieving chain tension, routing the new chain over the opener sprocket and rail, and setting chain tension per Genie specifications. After installation, recheck travel limits and safety reversal settings and adjust as needed in accordance with Genie instructions. For safety, always disconnect power to the opener and secure the door to prevent unintended movement during service. This OEM Genie replacement is an ideal fit for buyers searching for a replacement chain assembly for a compatible Genie chain-drive garage door opener rail.