In the daily production of Beiren (BEIREN) series printing presses, the chain lubrication system is one of the most common issues encountered by press operators and maintenance personnel. As a representative domestic offset press, this model features strong parts interchangeability and low maintenance costs, with the electrical system mostly controlled by domestic PLCs. If not addressed in a timely manner, it can range from affecting registration accuracy and print quality to causing extended downtime in severe cases.
I. Fault Symptoms: Abnormal noise from the main drive chain, chain jumping teeth, chain elongation, automatic lubrication alarms, and excessively high oil temperature.
II. Cause Analysis: Lubrication oil line blockage, oil quality deterioration, insufficient pressure from the automatic lubrication pump, improper chain tensioning, and misalignment of the oil mist lubrication nozzles. Considering that the Beiren is a representative domestic offset press with strong parts interchangeability, low maintenance costs, and mostly domestic PLC-controlled electrical systems, priority should be given to checking key components and standard parameters during troubleshooting.
III. Parts Replacement: Clean the oil lines, replace with qualified lubricating oil, verify lubrication pump pressure and cycle, adjust chain tension, and correct nozzle positions.
IV. List of Wear-Prone Parts: For the chain lubrication system, it is recommended to keep the following in stock: related bearings/bushings, Beiren-compatible sensors and suction nozzles, seals, and standard wear rollers. When replacing, be sure to use original or certified parts and verify model numbers.
V. Preventive Measures: Change the oil at scheduled intervals, monitor oil temperature and pressure, and perform regular tension inspections. The above methods also apply to models such as the Beiren 300, Beiren 400, PZ4880, and N300. For actual operations, refer to the domestic CNC system / centralized lubrication control and on-site working conditions. In complex situations, it is recommended to contact professional maintenance support through the printm.cn platform.
