Precautions for maintenance of hydraulic system

/ January 02, 2021

The hydraulic system is generally flushed before it is officially put into use. The purpose of the hydraulic system flushing is to remove contaminants, metal shavings, fiber compounds, iron cores, etc. that remain in the hydraulic system. In the first two hours of work, the hydraulic pressure is not completely damaged. The system can also cause a series of failures. Therefore, the following steps should be used to clean the hydraulic system oil line:


1) Clean the hydraulic system tank with a dry cleaning solvent and remove the solvent residue with filtered air.

2) Clean all piping of the hydraulic system. In some cases, pipes and joints need to be impregnated.

3) Install oil filter in the pipeline to protect the oil supply line and pressure line of the hydraulic valve.

4) Install a flushing plate on the collector to replace the precision valve, such as electro-hydraulic servo valve.

5) Check whether all piping dimensions of the hydraulic system are correct and whether the connection is correct.

If an electrohydraulic servo valve is used in the hydraulic system, the servo valve flushing plate must allow the oil to flow from the oil supply line to the collector and return directly to the tank. This allows the fluid to circulate repeatedly to flush the hydraulic system. The oil filter removes solid particles. During the flushing process, check the oil filter every 1 to 2 hours to prevent the oil filter from being contaminated by contaminants. Do not open the bypass at this time. If you find that the oil filter starts to clog, change the oil filter immediately. .

The cycle of flushing is determined by the configuration of the hydraulic system and the degree of contamination of the hydraulic system. If the sample of the filter medium has no or few extraneous contaminants, install a new oil filter, remove the flush plate, and install the valve!

Maintenance of Hydraulic System: Establish a regular maintenance system for hydraulic systems. The following are recommended for the maintenance of hydraulic systems:

1) Check the hydraulic system and replace the oil up to 500 hours or 3 months.

2) Regularly flush the inlet oil filter of the oil pump.

3) Check that the hydraulic oil has been contaminated by acidification or other contaminants. The odor of the hydraulic oil can be roughly identified as deterioration.

4) Repair the leak in the hydraulic system.

5) Make sure that no foreign particles enter the tank from the vent cover of the tank, the plug seat of the oil filter, the sealing gasket of the return line, and other openings in the tank.

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