The hydraulic filter is the filter component of the medium in the engine air intake system, lubrication system and combustion system.

There are generally three types of hydraulic filters: air filters, oil filters, and fuel filters, which are also called "three filters".

The air filter is located in the engine's air intake system. It is an assembly composed of one or several filter components that clean the air. Its main function is to filter out harmful impurities in the air that will enter the cylinder to reduce the early wear of the cylinder, piston, piston ring, valve and valve seat;

The oil filter is located in the engine lubrication system. Its function is to filter out harmful impurities in the oil from the oil pan, and supply the crankshaft, connecting rod, camshaft, supercharger, piston ring and other motion pairs with clean oil to play the role of lubrication, cooling, and cleaning. Extend the life of these parts;

There are three types of fuel filters: diesel filters, gasoline filters and natural gas filters. Its function is to filter out harmful particles and water in the engine fuel gas system to protect the oil pump nozzle, cylinder liner, piston ring, etc., reduce wear and avoid clogging.

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