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Teach you six steps of pump maintenance

2018-04-13 08:00:41

1, check the pump body and pulley for wear and damage, should be replaced if necessary. Check whether the pump shaft is bent, the degree of journal wear, and the shaft end thread is damaged. Check whether the blades on the impeller are broken and whether the shaft holes are seriously worn. Check the wear degree of the water seal and bakelite gasket, if it exceeds the use limit, it should be replaced with a new part. Check the wear of the bearing, the bearing clearance can be measured by the table, if more than 0.10mm, it should be replaced with a new bearing. 2, after the pump is taken out, it can be decomposed in order. After decomposition, the parts should be cleaned, and then checked one by one to see if there are cracks, damage and wear and other defects. If there are serious defects, they should be replaced. 3. Repair of water seal and seat: If the water seal is worn, it can be smoothed with emery cloth. If it is worn too much, it should be replaced. If the water seal seat has rough scratches, it can be repaired with a flat reamer or on the lathe. A new water seal assembly should be replaced during overhaul. 4, the following damage on the pump body is allowed to weld repair: the length is within 30mm, does not extend to the bearing seat hole cracks; The flange connecting with the cylinder head has a broken part; The oil seal seat hole is damaged. The bend of the pump shaft shall not exceed 0.05mm, otherwise it should be replaced. Damaged impeller blades should be replaced. Pump shaft bore serious wear should be replaced or insert repair. 5, check whether the pump bearing rotation is flexible or abnormal sound, if there is a problem with the bearing, should be replaced. 6, after the pump is assembled, turn it by hand, the pump shaft should have no stuck, the impeller and the pump shell should have no collision. Then check the pump displacement, if there is a problem, should check the cause and rule out. If the pump fails, the coolant will not be able to reach the corresponding place, and its performance will not be effectively played, which will ultimately affect the operation of the engine. Therefore, it is necessary to strengthen the inspection of the pump.