As long as the pump cover is disassembled, the whole rotor part can be disassembled without having to disassemble the inlet and outlet pipes. Close the import and export pump cover, open the drain plug and bleed plug, the water and gas discharge; Loosen the fasteners between the pump coupling and the motor coupling; 3. Loosen and squeeze out the filler cap; 4. Loosen the connecting bolt between pump cover and pump body and remove the pump cover. 5. Loosen the connection bolts between the bearing body and the pump off, remove the rotor parts; 6. Remove the pump coupling and bearing gland: 7. Loosen the nut and press out the bearing body from the shaft. The bearing body includes bearings to ensure even pressure, not to use the hammer, otherwise the bearing will be damaged. Disassemble packing, packing ring and bushing and loosen shaft nut. Remove the sleeve. The impeller and the shaft are gap fit, so the impeller can be removed relatively easily. If you can not split, beat the wheel with a wooden hammer.