YA00049276 Excavator Filter Element for EX2000-7-LD

Part number YA00049276 is the original hydraulic oil filter element (return oil filter element or high-pressure filter element) provided by Hitachi for EX2000-7-LD and other ultra large hydraulic excavators. According to the Hitachi parts system rules, this component is usually also suitable for platform models such as EX2000-7, EX2600-7, and EX3600-7. As the core unit of hydraulic system pollution control, it is used to efficiently intercept solid impurities such as metal debris, dust, and gum in hydraulic oil, and protect precision components such as main pumps, valve groups, and oil cylinders. Its common numbers include similar models such as YA00049275 and YA00049277, but the use of non-standard spare parts is strictly prohibited to avoid contamination or damage to the hydraulic system.

This product is a Hitachi pure hydraulic oil filter element, which uses high-strength metal shell and high-performance fiberglass filter material. The filtration accuracy is usually 10-20 μ m, and the filtration ratio X is ≥ 100. It can achieve the oil cleanliness level specified in ISO 4406 standard (such as ISO 12/8/3). The typical structure is a folding design to increase the filtering area and reduce flow resistance; The sealing surface is made of fluororubber (FKM) or nitrile rubber (NBR) to ensure no leakage under high pressure. The working pressure range is about 1.0-21.0MPa, the flow rate is about 200-400L/min, and the working temperature range is -30 ℃ to+110 ℃, suitable for the high vibration and high load working environment of ultra large excavators. Hitachi pure filter cartridges have significant advantages in filtration, sealing, and safety: the filter paper joints are pressure bonded with metal clips, and the glue penetrates evenly and adheres firmly, with a filtration efficiency of over 95%.

Replacement cycle: It is recommended to replace every 1000-1500 working hours, and in dusty and highly polluted environments (such as mines and crushing operations), it should be shortened to 500-800 hours. Daily inspection: Check the filter blockage indicator (if equipped) or system pressure gauge every week. If the pressure difference exceeds 0.35MPa, replace it immediately. Replacement steps: 1 Stop the engine and operate the hydraulic handle to release system pressure; 2. Clean the filter cartridge housing and its surroundings to prevent pollutants from entering the oil circuit; 3. Use a specialized tool to unscrew the old filter element and pay attention to collecting any spilled hydraulic oil; 4. Clean the sealing surface of the filter seat and apply a small amount of clean hydraulic oil on the sealing ring of the new filter element; 5. Manually tighten the filter element until the sealing ring contacts the filter seat, and then tighten it according to the torque requirements specified in the instruction manual; 6. Start the engine and run it at low speed for 10-15 minutes to check for leaks.