Check and repair of failure of brushless DC pump

Release date:2019-08-29 Author: Click:

1. Check whether the brushless DC water pump shaft is bent, the degree of shaft neck wear, and whether the thread of the shaft end is damaged. Check whether the blades on the impeller are broken, and whether the shaft hole is severely worn. Check the degree of wear of the water seal and bakelite gasket, if it exceeds the limit of use, replace with a new one. Check the wear of the bearing. Use a meter to measure the bearing clearance, and then replace the bearing with a new one.

2. After the pump is taken out, it can be decomposed in order. After disassembly, the parts should be cleaned, and then inspected one by one to see if there are defects such as cracks, damage, and wear. If there are serious defects, they should be replaced.

3. Repair of water seal and seat: If the water seal is worn and grooved, it can be smoothed with emery cloth.

4. The bending of the water pump shaft must not exceed 0.05mm, otherwise it should be replaced. Damaged impeller blades should be replaced. The shaft bore of the water pump is seriously worn and should be replaced or repaired.

5. Check whether the bearing of the water pump rotates flexibly or has abnormal noise. If there is a problem with the bearing, it should be replaced.

6. After the pump is assembled, turn it by hand, the pump shaft should be free from jamming, and the impeller and pump casing should be free from rubbing. Then check the water pump displacement, if there is any problem, check the cause and eliminate

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