1. Check the loss of loss parts: The impeller, buckle, shaft cover, bearing seat, etc. of the pump are easy to damage. First, the pump should be removed to check whether the damaged parts are intact. It is strictly forbidden to use damage and unqualified parts.

2. Replace the lubricant: Open the oil holes screws inside the sealing room and the motor, and release all the lubricant in the sealing room and inside the motor, replace the new oil to ensure the normal operation of the lubrication system.

3. Disassembling pump shell anti -rust: Before spring use, the top -level pump shell should be disassembled, and the gates will be started after rotating the impeller to prevent the component rust from starting normally and burn the motor. This maintenance is particularly important for the water -filled motor.

4. Ensure that the sealing requirements are very strict. When replacing the sealing room lubricating oil, if the oil is turbid and the water content is found, it must be replaced or replaced with a sealing box or seal ring to ensure that its sealing performance is good.

5. Dry motor: Use 500 trillion euros to measure the winding resistance of the diving pump and the insulation resistance of the shell. If the resistance value is less than 0.5 mega Euros, the motor water should be removed.

The drying method is: external drying method, current drying method, and the combined drying method carried out at the same time. The external drying method is to use the external thermal source for treatment. The common measures are: ⑴ Hot air: use the electric heater (a small -scale submersible pump can be used with a hair dryer) to blow the hot air to achieve the purpose of drying; In the closed box, use several about 200 watts of light bulbs for baking. Note that the baking temperature should not be too high, and should be controlled below 125 ° C; ⑶ Dry current: The three -phase winding of the motor can be connected or connected in parallel according to the impedance of the submersible pump and the power supply, and then connected to a variable resistor to adjust the current volume volume. It is about 60%of the rated current value, and it is powered on and dry.

6. Ensure that the bearing lubrication: Check the skeleton oil seal and lithium -based lubricating fat of the upper and lower lid bearing chamber for the water -filled diving pump. To ensure that the bearings work for a long time in a well lubricated state.

7. Check the bearings: Check the upper and lower bearing of the motor part. If the wear or excessive gap is found, the new bearing must be replaced in time. The inspection method is as follows: If the motor is running, the sound of "click", and the cycle is proportional to the speed, and it feels laborious when turning the rotation by hand. The sound of "choking", there is an uncertain death point when turning the rotation by hand. Generally, the roller is damaged, the inner ring is ruptured or the ball is broken. In the above situation, the bearings must be replaced to avoid greater damage.