1, open the water pump inlet box with a wrench, and be careful not to damage the sealing rubber ring. Remove the power cord, and use pliers to cut the three wires of the input motor coil, namely, two power cords and a series capacitor.
2. Loosen a few screws at the bottom of the pump with a wrench. Pay attention to using a suitable wrench to avoid pulling the screws with a adjustable wrench or a vise. The purpose is to prevent the nut from being damaged and causing difficulty in disassembly.
3. After the impeller nut is removed, take out the impeller. Tap the shaft bolt with a wooden hammer handle. The direction of knocking is axial and horizontal force. Note that the shaft bolt is as high as the impeller mouth surface, and remove the impeller. At the same time, remove the key from the shaft with a vice.
4. Remove the sealed moving ring from the shaft. Note that there are static rings at both ends of the moving ring, which are installed in a fixed position. Be careful not to damage this porcelain ring.