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【Meiruier Filter】Air filter maintenance

2021-04-17 View:

The function of the air filter is to filter the impurities in the air entering the cylinder to reduce the wear of the relevant parts of the compression system. At present, the air filter used on the engine can be divided into three types: inertial type, filtering type, and comprehensive type. Among them, it can be divided into dry type and wet type according to whether the filter element material is immersed in oil.

Maintenance of dry inertia filter: 
The dry inertia air filter device is composed of a dust hood, a deflector, a dust outlet, a dust cup, etc. Please pay attention to the following during maintenance:
1. Frequently check and clean the dust exhaust holes on the centrifugal dust removal hood, remove the dust adhering to the deflector, and pour the dust in the dust collection cup (the dust collection in the container should not exceed 1/3 of its volume). During installation, the sealing performance of the rubber gasket at the connection should be ensured, and there should be no air leakage, otherwise the air flow will be short-circuited, reducing the air rotation speed, and greatly reducing the dust removal effect.
2. The dust hood and diversion should be kept in the correct shape. If there is a bump, it should be shaped in time to avoid changing the flow direction of the original design and reducing the filtering effect.
3. Some drivers fill the dust cup (or dust collector tray), which is not allowed. Because the oil is easy to splash to the dust outlet, deflector and other parts, this part can absorb dust, which will eventually reduce the filtration and separation ability.

Maintenance of wet inertia filter:
The wet inertia air filter device is composed of a central pipe, an oil sump, etc. Please pay attention to the following during use:
1. Regularly clean the oil pan and change the oil. The viscosity of the oil should be moderate when changing the oil. If the viscosity is too high, it is easy to block the filter screen of the filter device and increase the air intake resistance; if the viscosity is too small, the oil adhesion ability is reduced, and the splashed oil is easy to be sucked into the cylinder to participate in the combustion and generate carbon deposits.
2. The height of the oil level in the oil pool should be moderate. The oil should be added between the upper and lower engraved lines of the oil pan or the arrow mark. The oil level is too low, the oil volume is insufficient, and the filtering effect is poor; the oil level is too high, and the oil is too much, which is easy to be sucked into the cylinder and burned, and may cause "speeding" accidents.

Maintenance of dry filter filter:
The dry air filter device is composed of a paper filter element and a sealing gasket. Please pay attention to the following during use:
1. Check regularly to ensure cleanliness. When removing the dust on the paper filter element, use a soft brush to remove the dust and soil on the surface of the filter element along the crease direction, and gently tap the end surface to make the dust fall off. When performing the above operations, use a clean cotton cloth or rubber plug to block both ends of the filter element, and blow air from the filter element to outside with a compressed air machine or an inflator (the air pressure should not exceed 0.2-0.3MPA to prevent damage to the filter paper) to blow off the dust adhering to the outer surface of the filter element.
2. Do not clean the paper filter element with water, diesel or gasoline, otherwise the pores of the filter element will be blocked, increasing air resistance; at the same time, diesel is easy to be sucked into the cylinder, causing overruns after installation.
3. When the filter element is found to be damaged, or the upper and lower end surfaces of the filter element are warped, or the rubber sealing ring is aging, deformed or damaged, replace with new ones.
4. When installing, pay attention to the gaskets or sealing rings of each joint part not to be missing or incorrectly installed, so as to avoid air short circuit. Do not overtighten the wing nut of the filter element to prevent crushing the filter element。

Maintenance of wet filter filter:
This device is mainly composed of a metal filter dipped in engine oil. Pay attention to:
1. Clean the dust on the filter with diesel or gasoline regularly.
2. When assembling, soak the filter screen with engine oil first, and then assemble after the excess engine oil drips out. When installing, the cross frame on the filter plate of the cake filter should be overlapped and aligned, and the inner and outer rubber rings of the filter should be well sealed to prevent short circuit of the air intake.

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