Professional Cat Primary Fuel Filter 4395037 439-5037 500086544 R160TDMAX

Applications:

• CASE  CX 460 TIER 3CX 470 BCX 700CX 800 B
• CATERPILLAR   140 H3176 B 3NL1->3176 B 9WK1->3456345 B II LME365 B II631 E SERIE II69 D725725730735740775 B775 D826 G BRL836 G900 FAD 40D 350 ED 350 E SERIE IID 400 ED 8 LGRPE ELECT 3412 CGRPE ELECT 3412 STAGRPE ELECT 3412 STA 3GRPE ELECT 3456R 1300 GR 1600 GR 2900 G
• CHALLENGER  65 E66067075 E85 D85 ECH 660CH 670
• COMPAIR-HOLMAN   C 105-14C 110-9C 180-24C 210-21C 240-17C 95-12

Professional Cat Primary Fuel Filter 4395037 439-5037 500086544 R160TDMAX

Q: How many fuel filters does a C15 cat have?

Caterpillar C15 engines usually have a fuel filter. This filter is a key part of the fuel system. It removes impurities to protect the fuel injection system. In some applications, like construction machinery or generator sets, auxiliary fuel filters may be added. A two-stage filtration system might also be used. But the standard setup is still mainly single.

If multiple filters are found, they may involve additional components. These could include oil-water separators or pre-filters. They are not the main fuel filter itself.

Q: Which fuel filter is primary and secondary?

In the fuel filter system, the distinction between primary and secondary filters is mainly based on filtration accuracy and process sequence. The primary filter is responsible for initial filtration, intercepting larger particle impurities; The secondary filter performs finer filtration to ensure the final cleanliness of the fuel.

The primary filter is usually located at the front end of the fuel system, such as installed at the front end of the fuel pump suction line, or as a built-in filter inside the fuel tank. Its filtration accuracy is low, and it can intercept particles with a diameter greater than 10 microns, playing a role in protecting subsequent components. The secondary filter is generally located near the high-pressure fuel pump or injection system, with high filtration accuracy. It often uses multi-stage filter materials (such as high-density filter paper and felt layer), which can adsorb smaller particles and gum, ensuring that the fuel entering the combustion chamber meets the standards. In diesel engines, the primary filter is often referred to as the coarse filter, while the secondary filter is the fine filter. The two work together to form a two-stage system of "coarse filter → fine filter".

Q: What is the purpose of the primary fuel filter?

The primary fuel filter is a critical component in the fuel system, mainly used to remove larger impurities and particles from the fuel, usually serving as the first filtering barrier.
Its core uses include: firstly, intercepting large-sized impurities, effectively removing particles with a diameter exceeding 100 microns, such as rust, metal debris, etc., to prevent these pollutants from entering the subsequent system;

Secondly, protect precision components and reduce the risk of wear and blockage of key components such as fuel pumps and injectors through initial filtration;

In addition, it can improve system reliability, reduce the burden on the fine filter, ensure stable fuel supply, and is particularly important for maintaining efficient operation in diesel engines.