4654745 Original Excavator Filter Element for Hitachi ZX470-6

The original hydraulic oil filter element part number 4654745 is a key filtering component of hydraulic systems in large excavators such as Hitachi ZX470-6. It is mainly suitable for ZX series models such as ZX470, ZX450, ZX690, etc. It is usually installed as a hydraulic return oil filter element in the hydraulic oil tank return pipeline, responsible for filtering pollutants such as metal debris and seal debris generated inside the system, and keeping the hydraulic oil clean. This universal number is its only original factory identification. When ordering, the complete model and serial number of the equipment must be provided to ensure that the interface specifications, installation dimensions, and filtration accuracy of the filter element are fully matched with the hydraulic system.

This product belongs to the hydraulic return oil filter element, and the filter material is usually made of glass fiber or high-efficiency filter paper, which has excellent oil and pressure resistance (working pressure is usually 1-2 MPa) and high filtration accuracy (can filter particles of more than 10 microns). Its structure includes a sealing ring, a bypass valve, and a pollution blockage transmitter (optional). When the filter element is blocked and the pressure difference increases, the bypass valve automatically opens to ensure continuous hydraulic oil reflux and prevent excessive system pressure. In the high-pressure and high flow hydraulic system of ZX470-6, it can effectively protect precision components such as hydraulic pumps, valves, and cylinders, and extend the service life of hydraulic oil.

It is recommended to replace it every 500 working hours or every 6 months, and in environments with high dust and harsh working conditions (such as mines and crushing operations), it should be shortened to 250-300 working hours. Replacement steps: 1 Stop the machine and release the hydraulic system pressure; 2. Use specialized tools to remove the old filter element; 3. Clean the filter cartridge seat and apply a small amount of hydraulic oil to the sealing ring of the new filter cartridge; 4. Manually tighten the new filter element until the sealing ring contacts the mounting seat, and then rotate it 3/4 turn (about 20-25 N · m); 5. Start the engine and operate the hydraulic action several times to check for leaks. Daily inspection: Check the filter housing for oil leakage and deformation every 50 hours of work, and observe whether the pollution blockage alarm light (if any) is on.