First, check whether the parts are intact
Disassemble the pump and check that the easily damaged parts such as the impeller, retaining ring, bearing and housing are in good condition.
Second, replace the new lubricant
Unscrew the oil hole screw inside the sealed chamber and the motor, and release all the lubricating oil inside the sealed chamber and the motor to refill the new lubricating oil.
Third, check the tightness
Pay attention to whether the installation of each component becomes slack due to long-term uselessness, or when replacing the lubricating oil in the sealed chamber, the water content should be identified. If the oil quality is corroded and the water content exceeds 50mL, the sealing is poor, and the static and static should be replaced. Seal ring or sealed box or replace it as a whole.
Fourth, the detection of insulation resistance
Use a megohmmeter to measure the insulation resistance of the motor winding. If it is lower than 0.5MΩ, the motor is poorly insulated. The motor should be removed for drying.
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