4676385 Original Excavator Fuel Filter for Hitachi ZX200-3

Part number 4676385 is the original fuel filter (diesel filter element) provided by Hitachi Construction Machinery for the ZX200-3 series 20 ton medium-sized hydraulic excavator. This component is mainly used for filtering the fuel system of electronic fuel injection engines, effectively intercepting pollutants such as moisture, impurities, and gum in diesel, ensuring the normal operation of fuel injectors and sufficient combustion of the engine. Its universal models cover Hitachi ZX200-3, ZX330-3, ZX210LC-3, ZX240LC-3 and other 3 series electronic fuel injection excavators (engine model 6HK1), as well as some ZAXIS200-3 equivalent platform models. The common part numbers include P8012, KHH12030, etc. As a core maintenance component of the original factory, its interface size and sealing performance are precisely matched with the engine fuel pipeline. The use of non-standard auxiliary components is strictly prohibited to avoid fuel system blockage, injector wear, or engine power reduction.

This product is a rotary paper diesel filter element, with a shell material usually made of cold-rolled steel plate and anti-corrosion coating, and an internal layer of composite filter paper (cellulose+glass fiber). Typical technical parameters: outer diameter of 94mm, inner diameter of 26mm, height of 167mm; filtration accuracy of 10 microns, maximum working pressure difference of 2MPa, working temperature of 35 ℃. The filter has a built-in oil-water separation function, which can effectively separate free water in diesel. The sealing ring is made of oil resistant rubber, ensuring 100% sealing without oil leakage. The filter structure is foldable, with a large effective filtering area, low flow resistance, and strong pollutant holding capacity.

Replacement cycle: every 500 working hours or every 6 months (whichever comes first); If the fuel quality is poor (high sulfur content, high impurities), it is recommended to shorten it to 250 working hours. Replacement steps: 1 Turn off the engine and wait for 5 minutes to release the fuel system pressure; 2. Place an oil pan under the filter; 3. Use a specialized filter wrench to loosen the old filter counterclockwise (pay attention to residual diesel); 4. Clean the sealing surface of the filter seat; 5. Apply clean diesel evenly on the sealing ring of the new filter; 6. Tighten clockwise by hand until the sealing ring contacts the base, then use a wrench to tighten 3/4 turn (torque 15-20N · m). Attention: 1 Before replacing the filter, the air in the fuel system must be drained (using a manual pump); 2. Before installation, check whether the filter housing is bumped or deformed; 3. After replacement, start the engine and run it at idle for 5-10 minutes to check for oil leakage and whether the engine runs smoothly;