To solve the noise problem of hydraulic cutting machine:
1. Inspect the various parts of the hydraulic cutting machine, replace the parts in question, or overhaul.
2. Replace the appropriate hydraulic oil.
3. Check the oil quantity of the hydraulic oil to prevent inhalation of air or cleaning of the filter.
4. Adjust the concentricity of the hydraulic cutting machine coupling or replace the parts.
5. Clean the valve core or replace the new one. The current must be stable and sufficient.