803400571 XCMG GR2605 motor grader secondary fuel filter

803400571 XCMG GR2605 motor grader secondary fuel filter

The XCMG GR2605 grader’s 803400571 secondary fuel filter is a core component of the engine’s fuel system, manufactured strictly according to XCMG’s original design standards, filtration precision, and installation specifications. It is specifically designed for the Cummins QSB6.7 high-pressure common rail engine, suitable for harsh operating environments with complex fuel impurities and extremely high requirements for fuel injection precision, such as highway construction, airport construction, mining operations, and large-scale earthmoving. As the “last line of defense” for fuel purification before it enters the engine, it inherits the pre-purification results of the 803400570 fuel coarse filter, precisely filtering out residual fine impurities (≥3μm), gum, asphalt, and other contaminants in the fuel. This prevents micron-level precision components such as the high-pressure fuel pump plunger and injector needle valve from experiencing injection malfunctions, power loss, or component burnout due to wear or blockage, directly ensuring the operational stability of the high-pressure common rail system and engine fuel economy. It is a high-quality original factory part for GR2605 grader fuel system maintenance and restoration of final purification performance.

This fuel filter features a high-efficiency nano-composite filter material design. The filter element has been optimized with a multi-layer gradient filtration structure. The inner layer is a high-precision glass fiber filter layer, achieving a filtration efficiency of over 99.8% for particles ≥3μm, effectively intercepting fine impurities remaining after coarse filtration. The outer layer is an anti-gum adsorption layer, which adsorbs sticky contaminants such as gum and asphalt in the fuel, preventing filter element clogging and injector carbon buildup, thus extending filter element life and maintenance intervals. The filter element shell is made of high-strength stamped carbon steel, treated with electrophoresis and powder coating for double-layer corrosion protection. It has excellent compressive strength and can withstand the high pressure of the fuel system for extended periods (maximum withstand pressure ≥2.5MPa). It is not easily deformed or leaking under severe equipment vibration and alternating high and low temperature conditions (-40℃ to 90℃), making it suitable for the stringent pressure requirements of high-pressure common rail systems.

The filter element is equipped with original factory-designed fluororubber sealing gaskets at both ends, offering outstanding oil and temperature resistance. The gap between the filter element and the filter housing interface is ≤0.03mm, preventing unfiltered fuel from bypassing and ensuring 100% fine filtration of the fuel. The filter housing connection threads are precision-machined with fine threads and feature anti-loosening washers, ensuring a secure and reliable installation without the risk of loosening under long-term vibration. The filter element integrates a stainless steel support frame and flow guide layer, enhancing the stability of the filter paper structure, preventing damage from high-pressure fuel impact, optimizing fuel flow path, and reducing intake resistance (initial resistance ≤2.5kPa) without affecting fuel supply efficiency. The product dimensions and installation interface are precisely matched with the XCMG GR2605 original vehicle fuel lines, filter holders, and 803400571 fuel coarse filter. The pore size tolerance is controlled within ±0.02mm, forming a two-stage filtration system of “coarse filtration + fine filtration.” No additional modification or adjustment is required during installation; simply tighten and secure. Disassembly is convenient, and replacement can be completed by a single person without professional tools. The filter element surface is printed with original factory specifications and replacement cycle reminders, allowing users to perform timely maintenance according to operating conditions (recommended replacement every 500 hours or when fuel consumption reaches 2500L), further extending the service life of the core components of the high-pressure common rail system.

Core Technical Parameters

Part Model: 803400571
Part Name: Secondary Fuel Filter (Final Fuel Purification)
Applicable Engine: XCMG GR2605 Motor Grader
Compatible Engine: Cummins QSB6.7 High-Pressure Common Rail Engine
Compatible Components: Forms a secondary filtration system when used with the 803400570 fuel pre-filter
Material: Nano-composite filter material, stamped carbon steel shell, fluororubber sealing gasket, stainless steel support frame
Process: Optimized gradient filtration structure, electrophoresis + powder coating for corrosion protection, precision thread machining
Filtration Accuracy: ≥3μm particulate matter filtration efficiency ≥99.8%
Tolerance Range: Temperature -40℃ to 90℃, maximum withstand pressure ≥2.5MPa
Initial resistance: ≤2.5kPa
Features: Precise filtration, anti-gumming and corrosion-resistant, pressure-bearing seal, low resistance and high efficiency, easy replacement
Functions: Final fuel filtration, interception of fine impurities, gum adsorption, protection of the high-pressure common rail system, and assurance of fuel injection accuracy

Core Advantages

Original factory standard precise fit, working in tandem with the coarse filter for protection; nano-composite material, industry-leading filtration precision; high-pressure resistant sealing design, compatible with high-pressure common rail systems; anti-gumming deposits, extending maintenance intervals; easy disassembly and assembly, high maintenance efficiency; reduces the risk of high-pressure common rail system failure and reduces overhaul costs.

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2. 803166369 Washer 18 JB/T1002-1977
3. 380905702 Steel Wire Braided Hose Assembly GR2153.01.3
4. 381100594 Bracket
5. 329900302 Thickened Flat Washer WT041.01030
6. 805046525 Bolt M10×20 GB/T5783-2000
7. 803400570 Primary Fuel Filter FS90122
8. 803400571 Secondary Fuel Filter FS90231
9. 805046416 Bolt M10×30GB/T5783-2000
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11 803105561 Fitting GE15LM16×1.5EDOMDCF
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14 803190860 Fitting GE15LM12×1.5EDOMDCF
15 803104916 Fitting GE12LMEDOMDCF
16 803107607 Fitting EW12LOMDCF
17 380904856 Steel wire braided hose assembly

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