The fuel filter is primarily intended for final cleaning of the entire fuel level before feeding it into the fuel line back to the engine. All modern engines use the following main types of fuel systems: injection, diesel and carburetor. For each such system, filters are used that are tailored to the different characteristics of the systems.
In various carburetor systems, the fuel pump sucks fuel from the tank and also pumps it into the carburetor. An in-line filter is located between the carburetor and the standard fuel tank and prevents dirt in the fuel from clogging the carburetor jets. The in-line filter is a conventional element in a nylon housing; the quality of the filtration level is twenty microns. The filter housing is connected here to the fuel line through conventional connections. The body of the filter itself is made of a transparent layer of nylon in order to control all the degree of contamination. Such a filter will need to be positioned in accordance with the accepted instructions of any manufacturer.
Injection system filters are injection system components that are more sensitive to contamination levels than conventional carburetor filters. Therefore, such systems include a fuel filter or a fuel line located in the tank. Basically, the fuel pump is located in the fuel tank, sucking fuel from the tank and at the same time pumping it through a conventional filter element back to the injectors. The working filter element together with the injection system always ensures high filtration quality: from five to seven microns.
At the same time, the filter element is located in a metal case and successfully retains water from the fuel. The filter housing is usually placed under the bottom of the machine here, so the filter housing must be resistant to salt corrosion. Diesel fuel is always sucked in by the fuel pump and pumped through the fine filter directly to the pump regulator under high pressure. In the lower part of the pump there is a primary filter for trapping all huge particles of dirt ... p>
At the same time, the filter element is located in a standard transparent case, which also performs the function of moisture separation. Considering that the weight of water here is greater than the weight of all the diesel fuel, it constantly collects at the bottom of the hull. Water will have to be removed according to the instructions described. Fine filtering is inherent in "duplex" filters, which have only two filter elements. They are needed for the process of capturing a large number of particles.
Source: www.truck39.com
