The LiftMaster 308115013K Intermediate Shaft and Sprocket Kit is a genuine OEM replacement assembly for select LiftMaster commercial door operators. Positioned within the drive train between the motor and output stage, this kit restores smooth, reliable power transfer in chain-driven systems by replacing worn components that can cause slippage, noise, or inconsistent travel. It’s designed for maintenance or repair of LiftMaster commercial trolley or hoist operators, helping keep sectional doors and rolling doors operating dependably in warehouse, industrial, and retail environments.
This factory kit is intended for model-specific use; always confirm compatibility with your operator’s parts diagram or service manual before ordering. Installation should be performed by a qualified technician following proper lockout/tagout procedures. Correct sprocket alignment, chain tensioning, and key/set‑screw torque are critical; apply threadlocker where specified by LiftMaster and verify guard placement after service. After replacement, check limits and control operation per the operator manual, as some units may require limit verification or adjustment. Using authentic LiftMaster components ensures the drive remains matched to the original engineering of the opener for long-term performance and safety.