4688141 Excavator Filter Element for Hitahci EX1800-3

The original filter element part number 4688141 is a hydraulic or fuel system filtration component provided by Hitachi Construction Machinery for the EX1800-3 large hydraulic excavator (equipped with a high-power diesel engine). This filter element is mainly used to filter impurities, particles, and moisture in hydraulic oil or diesel, protecting core components such as hydraulic pumps, control valves, or high-pressure common rail systems. Its universal models may include P-series alternative numbers (such as P173238, etc.) and are widely applicable to Hitachi large excavators of the EX1100, EX850, EX700, EX550, EX470 and other series. As an integrated design from the original factory, it matches the depth of the vehicle pipeline and strictly prohibits the use of non-standard auxiliary filter elements to ensure filtration accuracy and system reliability.

This product is an original high-efficiency filter element. Depending on its application system, it may be a hydraulic return filter element or a fuel fine filter element. Adopting foldable filter paper or glass fiber composite structure (chrysanthemum shaped design to increase filtration area), the outer shell is made of metal mesh or punched steel shell. Typical technical parameters: filtration accuracy ≤ 10 μ m, water separation efficiency ≥ 93%, working temperature range -30 ℃ to+120 ℃, maximum working pressure difference ≤ 1MPa. The interface is standard M22 × 1.5 or M24 × 1.5 thread, equipped with O-type fluororubber sealing ring. This filter element complies with ISO 3968 (hydraulic) or ISO 4020 (fuel) testing standards and is suitable for harsh working conditions such as high vibration, high dust, and large temperature differences in excavators. It can effectively remove more than 95% of particles larger than 10 μ m in the oil, ensuring that the system cleanliness reaches NAS level 9 or above.

Replacement cycle: It is recommended to replace every 500-1000 working hours or every 6-12 months (whichever comes first); If working in dusty and high load environments, it should be shortened to every 250-500 working hours. Replacement steps: 1 Release system pressure (the hydraulic system needs to operate the handle to release pressure, and the fuel system needs to unplug the fuel pump relay to start and turn off the engine); 2. Positioning filter element (usually located on the hydraulic oil tank return line or engine compartment fuel line); 3. Disassemble old parts (use a special wrench and place an oil pan below); 4. Install new parts (pay attention to the arrow indicating the direction of oil flow and ensure that the sealing ring is intact); 5. System re inspection (start the engine and run it at idle speed, check that there is no leakage at each interface). Fault diagnosis: If there are abnormalities such as slow movement, power drop, difficulty starting, system overheating, etc., check whether the filter element is blocked; If the pollution alarm light is on, replace the filter element immediately and check the oil quality.