Each press, depending on its type and capabilities, requires individual maintenance. We recommend in first instance to follow the maintenance schedule comprised in the manual of a given machine, even though most hydraulic presses have similar maintenance needs.

Improper oil level may lead to a pump failure due to cavitation phenomenon in which air enters the pumped medium, while too warm oil may cause premature failure of the pump. In addition, monitoring of oil temperature allows detection of abnormalities in the circuit components. Sudden heating up of any system of a press, which usually runs at a low temperature, may indicate a faulty element through which oil enters and causes system overheating.

Any press, irrespective of its frame structure: either fully welded or made with use of tie rods, contains numerous threaded connections, and proper quality of bolts and nuts is a pre-condition of its proper operation. Check actuator fastening monthly and make sure all bolts are tightened to the correct torque. Use baseline markings as quick reference indicators for future monitoring. Many presses have markings on the mounting bolts to confirm they have been tightened to the correct torque. Also monitor joining parts of a table top and nuts to tighten tie rods.

The best tool to monitor performance of press system is data logging, although it is not often used. Data acquired such as evolution of operating pressure during press cycle, high-speed in-feed and compacting, and high-speed retracting may provide important information on the performance of press systems. The press manufacturer should record these data during the equipment testing and made them available to the user. The best opportunity to record this data is at the press start-up. Data acquired should be reviewed periodically. Any occurred increase of operating pressure means the components work under their optimum performances and may have failed.