Reasons and solutions for the failure of slurry pump to start

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• TIME : 2025-07-22

1、 Power issue

Insufficient power supply voltage

Reason: The power supply voltage is lower than the equipment requirements, causing the motor to fail to start normally.

Solution: Check if the power supply voltage meets the equipment requirements, and if necessary, add a voltage regulator or replace the power supply circuit.

Poor contact of power cord

Reason: Loose or oxidized power cord connectors result in poor current transmission.

Solution: Check and tighten the power cord connector, clean the oxide, and ensure good contact.

Insufficient power supply or line malfunction

Reason: Insufficient power supply or problems such as open circuit, poor contact, and blown fuses in the circuit.

Solution: Identify the cause and promptly repair it, such as replacing the fuse or repairing the circuit.

Three phase power supply phase loss

Reason: Phase loss in the three-phase power supply system causes the motor to malfunction.

Solution: Check the power supply system to ensure that the three-phase power supply is normal.

2、 Mechanical malfunction

Bearing stuck

Reason: Long term lack of maintenance, insufficient lubrication or severe wear of bearings, resulting in bearing jamming.

Solution: Regularly lubricate and maintain the motor bearings. If they are stuck, they need to be disassembled, cleaned, or replaced.

Impeller stuck

Reason: The impeller is entangled or blocked by foreign objects, causing it to be unable to rotate.

Solution: Turn off the power, remove the pump body to clean foreign objects, check and repair the impeller.

The packing is too tight or the pump body is blocked

Reason: The packing is too tight or the impeller and pump body are blocked by debris.

Solution: Relax the filling material and unclog the drainage channel; Disassemble the pump body to remove debris.

The pump shaft, bearings, and leakage reducing ring are rusted

Reason: The pump shaft, bearings, or leakage reducing ring may rust due to prolonged disuse or humid environments.

Solution: Remove the pump shaft for calibration or replace it with a new one, and remove any rust.

3、 Control system issues

Control cabinet malfunction

Reason: Internal components of the control cabinet are damaged or wired incorrectly, resulting in the inability to issue a start signal.

Solution: Check the status of each component inside the control cabinet, repair or replace damaged components, and ensure correct wiring.

Protective device action

Reason: Overload, short circuit and other protective devices operate due to abnormal conditions, cutting off the power supply.

Solution: Identify the cause of the protective device's action, eliminate the fault, and reset the protective device.

Embedded starter damaged

Reason: The embedded starter is damaged, causing the pump to fail to start.

Solution: Replace the embedded starter.

4、 Other factors

Media issues

Reason: The conveying medium contains large solid or fibrous substances, causing blockage.

Solution: Optimize the medium processing technology to reduce the content of large solid and fibrous substances.

The ambient temperature is too low

Reason: In low temperature environments, the viscosity of lubricating oil increases, affecting startup.

Solution: Take insulation measures and use lubricating oil suitable for low-temperature environments.

Hydraulic cylinder stuck or hydraulic pump blocked

Reason: The hydraulic cylinder or pump cannot function properly due to foreign object blockage or wear.

Solution: Clean the hydraulic cylinder or pump.

5、 Summary

There are various reasons why slurry pumps cannot start, which may involve power supply, mechanical components, control systems, and other external factors. When troubleshooting, starting from the power supply situation, gradually investigate the problems of mechanical components and control systems to ensure that each step is handled properly. If the malfunction cannot be resolved on its own, it is recommended to contact professional maintenance personnel for inspection and repair.

　　This article originates from https://www.fuyangpumps.com/news/488.html. Please indicate the source when reprinting.

(Editor in charge: Slurry Pump https://www.fuyangpumps.com/)

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