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Common problems with oil/fuel/air filter elements in construction machinery

Q1: The role of the “three cores”
The function of the engine oil filter element is to effectively filter impurities in the engine oil, reduce the flow resistance of the engine oil, ensure lubrication, and minimize the wear of various components during operation;
The function of the fuel filter is to effectively filter out impurities such as dust, iron filings, metal oxides, and oil sludge in the fuel, prevent blockage of the fuel system, improve combustion efficiency, and ensure stable engine operation;
The air filter is located in the intake system of the engine, and its main function is to effectively filter the air entering the cylinder, reducing early wear of the cylinder, piston, piston ring, valve and valve seat, preventing black smoke, and providing assurance for the normal operation and power output of the engine.
Research has shown that there are three main forms of engine wear: corrosion wear, contact wear, and abrasive wear, with abrasive wear accounting for 60% -70% of the wear value. Engineering machinery typically operates in very harsh environments, and without proper filter protection, the engine’s cylinders and piston rings will quickly wear out. The main function of the “three cores” is to reduce abrasive damage to the engine and ensure engine efficiency by effectively filtering air, oil, and fuel.


Q2: Replacement cycle of “three cores”
Normally, the replacement cycle for the engine oil filter is 50 hours of operation for the first time, followed by every 300 hours of operation thereafter; The replacement cycle of the fuel filter is the first 100 hours of operation, and then every 300 hours of operation. The replacement cycle can be appropriately extended or shortened based on the difference in the quality level of the oil and fuel being filled; The replacement cycle of the air filter used by different models varies, mainly adjusting the replacement cycle of the air filter according to the air quality of the working environment, and the inner and outer filter elements must be replaced together. It is worth mentioning that it is not recommended to use compressed air for cleaning the air filter element, as high-pressure airflow can damage the filter paper and affect the filter efficiency of the filter element.


Q3: Is the higher the filtering accuracy of the filter element, the better
A filter element with high filtration accuracy has a low ash content and is prone to the risk of clogging. The service life of the filter element is also relatively short, so the higher the filtration accuracy of the filter element, the better. The appropriate one is the best. A qualified filter element product should strike a balance between filtration accuracy, filtration efficiency, and ash capacity rate according to the operational requirements of the appropriate model.
Q4: Is it necessary to use high-quality filter elements for old machines
The gap between the components of the old engine increases, wear intensifies, and the requirements for lubrication and fuel cleanliness are higher. This requires the use of high-quality filter elements to ensure lubrication and maintain engine efficiency, reduce engine failures, and delay engine scrapping time.


Q5: Is it wise to shorten the replacement cycle by using inferior filter elements
Nowadays, many machine owners prefer to purchase low-priced inferior filter elements to replace the original factory filter elements, believing that spending the same amount of money to buy more ordinary filter elements for replacement can better protect the engine. In fact, this approach is not worth the loss. Because non original filter elements may not necessarily be compatible, and it is difficult to ensure effective filtration, some may even fail to filter at all, ultimately leading to frequent engine failures, black smoke, high fuel consumption, abnormal wear, major repairs or early scrapping.
Q6: Choose “three cores” with caution
The use of high-quality and adaptable filter elements can provide effective filtration protection for beloved machines, reduce maintenance costs, improve fuel economy, extend the service life of the entire machine, and save users money and worry; On the contrary, using inferior or unsuitable filter element products will lead to premature engine wear, increased fuel consumption, and increased maintenance costs.


In a sense, the existence of the “three cores” has only one ultimate purpose, which is to protect the engine system. If the performance of the filter element cannot meet the relevant technical requirements and the filtering effect is lost, the working efficiency of the engine will be significantly reduced, and even lead to early overhaul or scrapping.
So, when choosing filter cartridges, one should not just focus on being cheap, the right size, and being able to install them. Instead, one should choose high-quality and suitable filter cartridge products.
Many domestic filter element manufacturers only simply copy or imitate the geometric dimensions and appearance of the original parts, and are indifferent to issues such as material selection, strength, filtration efficiency, service life, and compatibility of filter paper. They only seek cheap prices and can make money.
The damage caused by inferior or unsuitable filter elements to the engine is a process from quantitative change to qualitative change. This is why many engine owners have the illusion that there is no difference between using inferior filter elements and using genuine filter elements. In the short term, the engine seems to operate normally, but they are unaware that various impurities and particles may have already entered the engine system and continue to corrode and wear the engine. And these damages are persistent and implicit, although no signs can be seen for a short period of time, once problems are discovered, it is too late. Therefore, adhering to the use of high-quality original factory filter elements can maximize the protection of the engine.