Machine Tool Pump Failures: Causes and Solutions

Author: WeidoyaPublished: 2025-12-29 09:24:38Views: 0

Symptom		Cause	Corrective action
Unable to rotate.	When operating noise is present.	- Poor switch contact. - Broken wire. - Bearing wear causes the motor rotor to Contacts the stator.	- Check wire connections. - Contact Weidoya for service. - Replace the bearing.
Unable to rotate.	When no operating noise is present.	- Open circuit in the motor winding. - Broken wire. - Poor switch contact.	- Contact Weidoya for service. - Repair the wiring. - Replace and adjust the switch.
When rotating.	Noise and overcurrent. Overheating occurs.	- The motor rotor contacts the stator. - The motor rotor and stator are unbalanced. - An open phase in the stator winding. - Reverse rotation.	- Contact Weidoya for service. - Swap two of the three power leads.
Reduced discharge volume.	Low discharge volume.	- Insufficient oil in the tank. - Impeller wear. - Low oil viscosity.	- Eliminate the cause of air bubbles. - Replace the impeller. - Maintain appropriate viscosity (150 cSt at 30°C).
Reduced discharge volume.	Discharge decreases sharply.	- The suction side is blocked by foreign matter. - Insufficient oil in the tank.	- Clean the suction inlet. - Refill oil.