The Genie 38415A.S 8 Tooth Chain Sprocket is a genuine OEM replacement for select Genie chain-drive garage door openers. Located in the head unit, this 8-tooth sprocket engages the drive chain to move the trolley and open or close the door, restoring smooth, reliable travel when the original sprocket is worn, chipped, or slipping. Use it as a direct replacement part on compatible Genie residential chain-drive models that specifically call for part number 38415A.S in their parts list or service manual.
Installation typically involves disconnecting power to the opener, securing the door in the closed position, removing the opener’s cover, relieving chain tension, swapping the sprocket, then re-tensioning the chain and verifying alignment. After replacement, you may need to recheck or reset travel limits and safety force settings per the opener’s instructions. For precise compatibility, always match the opener model and part number against Genie documentation or the unit’s parts diagram. This OEM sprocket supports dependable drive engagement and helps eliminate chain skip and noise associated with a worn drive component, making it a practical repair for residential garage door opener maintenance.