How to disassemble the internal blades of sagitar secondary air pump?

Remove the screw and pulley shaft. Remove the leaves. The working principle of the secondary air pump is: when the engine is working, the air pump is driven by the crankshaft drive belt, and the airflow with high pumping capacity and low pressure enters the diverter valve through the hose. Under normal circumstances, the valve on the diverter valve is opened, and air flows into the air injection manifold through the diverter valve and the check valve. Its function is: the air injection manifold injects the airflow into the engine exhaust hole or exhaust manifold, which reacts with hc and co in the exhaust gas and further converts it into co2 and water vapor, thus reducing the exhaust pollution.