4363399 Original Excavator Hydraulic Drain Piping Filter for Hitachi ZX600

The original hydraulic drain pipe filter (part number 4363399) is a genuine hydraulic system filtering component of the Hitachi ZX600 large excavator. It is mainly used in the return oil pipeline or pump suction pipeline of the hydraulic oil tank of this model to filter out solid particles, moisture, and gum pollutants in the hydraulic oil. This filter is also widely used in large excavators and similar models such as Hitachi ZX670-6 and ZX490LCH-7. Its common number 4363399 is its unified identification in Hitachi's original factory and third-party accessory systems. When placing an order, it is necessary to provide the complete model and serial number of the excavator for verification to ensure that it matches the pipeline interface size and system flow rate perfectly.

This product belongs to the rotary hydraulic return oil filter element for construction machinery and follows the ISO 2941 hydraulic filter element standard. Its structure adopts multi-layer glass fiber or imported fiber folded filter paper, with a filtration accuracy of up to 10 µ m (or higher), which can effectively intercept metal debris, dust, moisture, and oxidized gum in hydraulic oil. The main technical indicators include: rated flow rate ≥ 100L/min, initial pressure difference ≤ 0.2MPa, compressive strength ≥ 1.0MPa, working temperature range -30 ° C to+120 ° C. The end cap and sealing ring of the original filter element are made of oil resistant rubber or fluororubber material to ensure long-term sealing reliability under high pressure pulses and oil temperature fluctuations.

It is recommended to replace the filter every 1000 hours of work or every 6 months, and it should be shortened to 500 hours under dusty, high humidity, or heavy load conditions. Before replacement, turn off the engine and release the hydraulic system pressure, and operate in a cold state. When disassembling the old filter element, it is necessary to clean the sealing surface of the installation seat. Before installing the new filter element (4363399), a small amount of clean hydraulic oil should be applied to the sealing ring, and attention should be paid to the direction of the arrow (pointing towards the oil tank return end). Manually tighten according to the torque specified in the maintenance manual (usually 30-40 N · m). Regularly check the cleanliness and oil level of hydraulic oil (NAS level 8 or below) to avoid water intrusion. Regular replacement can effectively prevent wear and tear of hydraulic pumps, valve groups, and system pressure fluctuations, ensuring stable operation and long service life of equipment.