A flush valve assembly including a manifold including an inlet, an outlet, and a fluid passageway positioned between the inlet and the outlet, a motor coupled to the manifold and including a drive gear, a valve cartridge coupled to the manifold, and a shaft extending from the valve cartridge. The shaft includes a valve gear configured to mesh with the drive gear. Rotational motion from the motor is transferred through the drive gear, the valve gear, and the valve shaft to rotate the valve cartridge between a first position and a second position. The flush valve assembly additionally includes a bracket removably coupled to the manifold. The bracket is configured to align the drive gear and the valve gear in a predetermined position.