What should be done when the excavator fails to work with the slewing function? What is the reason for the slow turning speed of the excavator? How to handle and check such faults?
If the slewing speed of the excavator is slow or the slewing function cannot work, it may be the fault of the pilot system or the fault of the main overflow system. Of course, the specific problems need to be analyzed in detail.
Inspection prompt for slow slewing speed of excavator:
Check whether the pilot system is faulty or the main overflow system is faulty. If other functions (front attachment or travel) work normally, the pilot pump can be considered normal. If there is a problem with the pilot system, the cause of the problem may lie in the pilot system behind the pilot valve.
What about the slow slewing speed of excavator maintenance? Fault repair:
Check whether the pilot secondary pressure is normal. (no, the pilot valve is faulty; yes, monitor the control pressure of the pump.)
When slowly operating the control lever, check whether the change of the pump control pressure is smooth. (no, the control valve spool is stuck; yes, continue to check whether the swing overflow pressure is normal.)
Continue to check whether the slewing overflow pressure is normal. (no, the slewing overflow valve is faulty; yes, continue to check whether the oil discharge of the slewing motor is normal.)
Continue to check whether the oil discharge of the swing motor is normal (no, it is the fault of the swing motor; yes, continue to check whether the parking brake release valve of the swing motor is stuck or stuck)
Continue to check whether the parking brake release valve of the swing motor is stuck or jammed (yes, the parking brake release valve of the swing motor is faulty; no, the swing reducer is faulty.)
