4688142 Excavator Filter element for EX1800-3

Part number 4688142 is the original filter element provided by Hitachi for the EX1800-3 large mining hydraulic excavator. According to the supplier information, the part number clearly corresponds to the oil separator (i.e. oil or fuel filter), and its universal models cover large EX series models such as EX700, EX750-5, EX1800-3, etc. As a key filtering component for lubrication or fuel systems of large equipment, its universal models usually cover subsequent models such as EX1800-5 and EX1800-6 of the same tonnage and engine platform. It is strictly prohibited to use non original or inferior filter elements to prevent impurities from entering the precision fuel system or engine lubrication system, causing abnormal wear or damage to core components such as injectors, high-pressure oil pumps, crankshafts, etc.

This product is a rotary oil filter element, which is the core filtering component of the engine or hydraulic system circulation oil circuit. Its main function is to efficiently filter out solid impurities such as metal wear particles, carbon deposits, dust, and gum in the oil, ensuring that the oil entering each friction pair of the system is highly clean, thereby protecting precision components such as high-pressure oil pumps, fuel injectors, hydraulic pumps, and valve groups, ensuring stable operation of the equipment and improving fuel economy. Modern large-scale construction machinery has extremely high requirements for oil cleanliness. Such filter elements usually use high-performance composite filter materials (such as a mixture of cellulose and fiberglass), with high filtration accuracy (able to intercept particles in the 10-30 micron range) and high pollutant holding capacity. The filter is equipped with an integrated check valve (to prevent oil backflow after shutdown, which may cause a shortage of oil during startup) and a bypass valve (to open when the filter element is clogged or the oil is viscous at low temperatures, ensuring continuous oil supply). Its working pressure, flow rate, and system are fully matched, which is a key barrier to protect the powertrain and hydraulic system.

Replacement cycle: As a vulnerable part, it needs to be replaced regularly. For such large mining equipment, the conventional recommendation is to replace it every 500 working hours or every 6 months (whichever comes first). However, considering that EX1800-3 often operates in harsh working conditions such as mining and heavy loads, and the quality of oil products varies greatly, the actual replacement cycle should be significantly shortened. It is recommended to check every 250-500 working hours or according to the equipment maintenance manual. Once the filter element is found to be dirty, the pressure difference alarm is triggered, or the system shows symptoms such as pressure fluctuations and abnormal noises, it should be replaced immediately.