FF5952 fuel filter

FF5952 5521254 Spin-On Diesel Fuel Filter FF5952 is the Fleetguard standard part number corresponding to Cummins OEM code 5521254, a high-performance spin-on secondary diesel fuel filter specially developed for Cummins L9 NS6B400 Euro VI heavy-duty common rail diesel engines widely equipped on Dongfeng Kinland heavy trucks, tractor units and large commercial vehicles. Installed in the fuel supply pipeline, it acts as critical protection for high-pressure fuel pumps and precision injectors. This filter efficiently captures rust particles, fine sand, carbon deposits, colloidal sludge and tiny abrasive impurities inside diesel fuel to prevent premature wear and clogging of delicate fuel system components. Manufactured strictly under IATF 16949:2016 international automotive quality certification, it maintains stable long-cycle filtration performance during long-distance highway transportation, dusty mining routes, high-temperature summer climates and frigid low-temperature northern working environments. It serves as a perfect direct aftermarket interchange part for original OEM 5521254 and Fleetguard FF5952 filters, effectively stabilizing engine power output, cutting unexpected vehicle downtime, and greatly extending the service life of core fuel system assemblies for heavy commercial fleets.  Product Material Description: High-Strength Thickened Carbon Steel Housing: Made of heavy-gauge cold-rolled carbon steel with full electrophoretic anti-rust and anti-corrosion coating. It delivers excellent pressure resistance and impact resistance, able to sustain continuous fuel system operating pressure without deformation, cracking or diesel leakage, providing comprehensive outer protection for the internal filter element. High-Density Gradient Composite Filter Media: Premium resin-impregnated wood pulp filter paper with deep dense pleated design to maximize effective filtration area. The progressive gradient density structure realizes staged precision fine filtration, balancing outstanding particle capture efficiency and steady fuel flow, avoiding insufficient oil supply under full engine rated load. Industrial Grade NBR Sealing Gasket: High-temperature resistant nitrile rubber seal ring with strong tolerance to diesel corrosion, thermal fluctuation and long-term aging. It retains stable sealing elasticity within -35℃ ~ 130℃ working temperature range, thoroughly preventing bypass of unfiltered fuel and joint leakage at the mounting position. Precision CNC Thread Base: Adopts standard 1-14UNF-2B internal thread base processed by CNC machining, with precise thread tolerance and solid structural strength for easy spin-on installation and quick disassembly during routine maintenance.