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Before replacing, release the original hydraulic oil, check the return oil filter element, oil suction filter element, pilot filter element, to see whether there is iron scrap copper scrap or other impurities,otherwise, there maybe hydraulic component fault.Repair and eliminate, clean the system.

When installing the filter equipment, pay attention to the liquid flow direction indicated on the shell, and install it correctly in the hydraulic system;

Before filtering the hydraulic oil, all cylinders should be retracted to the end.

Oil supply device: There are oil pump, oil pipeline, oil pipe, pressure limiting valve, etc., it can make oil flow in the circulation system at a fixed pressure and flow rate.

When the filter fails during use, it can be explained by the following reasons：

Many users will think that the bypass valve of the filter and the safety valve of the system have the same function