For the engine, dust is the main cause of early engine wear. The air filter is equivalent to the mask we wear to isolate harmful substances in the air. It can filter out dust and sand in the air and ensure the cylinder enter sufficient, clean air.
Because the air filter can be used continuously for a long time without maintenance, and the replacement cycle is relatively long, many construction machinery users tend to ignore its maintenance during use, and sometimes they only remember it when the blockage indicator alarms. Clean or replace it. Among the many parts of construction machinery, the air filter may be a very inconspicuous part. However, the air filter plays a vital role in engineering machinery and equipment. It can directly affect important parts of the engine's life and is also one of the important reasons for engine failure.
1. Regular maintenance of the air filter
Construction machinery and equipment are mostly used in high-dust operating environments such as municipal construction and mines. The engine needs to suck in a large amount of air during working process. If the air is not filtered, the suspended dust in the air is sucked into the cylinder, which will accelerate the piston assembly. And the wear of the cylinder. Larger particles enter between the piston and the cylinder, and even cause serious "cylinder scuffing" phenomenon, which is especially serious in a dry and sandy working environment. The installation of an air filter is the main means to solve this problem. After the air filter is used for a period of time, due to the increase in the amount of dust attached to the filter element, the air intake resistance will increase, and the air intake will decrease, making the engine performance drops. Therefore, the filter element of the air cleaner must be maintained and maintained regularly. In general, the maintenance cycle of the air filter used in construction machinery and equipment is: clean the outer filter element of the filter every 250 hours, and replace the inner and outer filter elements of the air filter after every 6 cleanings or after 1 year.
2. Clean the air filter
The specific steps for cleaning the air filter are: remove the end cover, remove the outer filter to clean it, and when removing the dust on the paper air filter, use a soft brush to brush the surface of the filter element along the direction of the crease. And tap the end face lightly to make the dust fall off. It should be noted that when removing ash, clean cotton cloth or rubber plugs should be used to block both ends of the filter element to prevent dust from falling into the filter element. A better way is to use a compressed air machine or an inflator (the air pressure should not exceed 0.2-0.3MPA. Anti-damage filter paper) blow air from the inside of the filter element to blow away the dust adhering to the outer surface of the filter element. The dry-type air filter mistakenly cleans the paper filter element with water, diesel or gasoline, otherwise the pores of the filter element will be blocked, increasing the air resistance.
In the air filter instruction manual, although the operating hours are specified as maintenance or replacement data. But in fact, the maintenance and replacement cycle of the air filter is also related to environmental factors. If you often work in a dusty environment, you should shorten the replacement cycle slightly, in actual work, many owners will not flexibly grasp the environment and other factors, and even continue to use the air filter as long as it is not damaged. It should be noted that the air filter will fail, and maintenance at this time will not be able to recover the losses that have been caused. Buying an air filter is not worth much, and if the engine is damaged, it is not worth the gain. When removing dust from the air filter, if the filter element paper is found to be seriously damaged or damaged, or the upper and lower end surfaces of the filter element are warped, or the rubber seal ring is aging, deformed or damaged, replace with a new one.
3. Harm of false air filter
Due to the simple process and low production cost of air filters, they are extremely easy to be imitated. It is understood that air filters are currently flooded with more than 80% of fakes in the market. The fake filter elements are made of cheap and low-quality non-woven fabrics. Or made of low-quality or even counterfeit activated carbon, the cost is less than 10 yuan, this kind of filter not only does not have a good protective effect on the machine, and even some of the poor workmanship also has the phenomenon of slag drop during use. Directly into the engine, causing damage to the engine.
4, Air filter identification method
When you open the package, there be a pungent odor of recycled plastic. It must be a fake. The genuine air filter does not have a pungent odor. The overall workmanship of the filter element is not neat, the filter paper is not neatly arranged, and has obvious defects.
The thin material can be judged as a fake too. The filter paper of the genuine filter element has high regularity, thick material and strong air permeability. Secondly, you can look at the package, look at the code, and check the serial number online to identify the authenticity. In addition to the above, there are still some highly simulated air filters on the market. It is difficult to distinguish between true and false. Therefore, it is recommended that users find regular channels and trusted suppliers when purchasing air filters.
