Old drivers who have operated excavators for many years may have encountered unusual noises in the ultrafine vertical mill. What is the cause of the noise in the ultrafine vertical mill? Today we will analyze the causes and solutions of noise in the ultrafine vertical mill from five aspects.

Pressure fluctuations and noise in the system are caused by improper mating of spool valve with valve bore or by dirt trapping in contact of cone valve with valve seat, blockage of damper bore, skewed spring or failure to move properly in valve bore.

Solution: Pay attention to cleaning and dredging the Yinni hole;Check the relief valve and repair or replace it if damage is found.