Inspection and repair of water pump
1) Check the pump body. If there are cracks and ruptures, drill holes with a diameter of ￠3mm at both ends of the crack, and then make a 3x90° groove along the crack. After the pump body is preheated, use pig iron welding rod for electric or gas welding. , After welding, it should be kept warm and slowly cooled in asbestos powder.
2) The wear of the front and rear bearing holes should not be greater than 0.03mm; the radial clearance should not be greater than 0.15mm; the axial clearance should not be greater than 0.3mm, otherwise it should be replaced.
3) The bend of the water pump shaft should not be greater than 0.05mm, otherwise it should be repaired. When repairing, it can be corrected by cold pressing, or repaired by chrome plating after polishing.
4) Check whether the contact surface of the stop washer is flat, whether the screw hole is damaged, the water seal, the bakelite, etc. should be intact, and can be replaced according to the situation.
5) When assembling, the gap between the shaft of the pump housing and the impeller should be within the range of 0.04-0.8mm. The size of the gap can be adjusted by repairing the water blocking ring or adding a gasket between the water blocking ring and the bearing.
6) The assembly of the water pump impeller and the water pump shaft should be firm without looseness.
7) After assembly, there must be no looseness between the pulley and the water pump shaft. Rotate the pulley by hand, and the water pump shaft should not be blocked. The impeller of the water pump and the casing of the water pump should have no impact.
