When sourcing used hydraulic machinery, you must prioritize the Nominal Pressure (Tonnage) to ensure it meets your production requirements. Critically inspect the Cylinder Stroke and Daylight (Open Height) for compatibility with your molds. Additionally, verify the Approach, Pressing, and Return Speeds, as these directly impact cycle times. Ensure the Bolster Plate is free of excessive wear or deformation, and check if the Hydraulic System uses reputable components (e.g., Rexroth or Vickers) for easier future maintenance.