Donaldson Fuel Filter Water Separator – Part No. P552040 The Donaldson P552040 is a spin-on fuel filter and water separator cartridge engineered to safeguard diesel engines by removing water and contaminants from fuel. Designed as a direct replacement for Racor® 2040 series housings, it ensures reliable fuel cleanliness under demanding conditions. Key Features: Dual-Stage Filtration A cellulose media core removes solid particles down to 10 μm while separating 95% of emulsified water to protect injectors and pumps. Integrated Pressure Relief Valve Allows fuel to rise slowly during cold starts to prevent air lock and ensure immediate fuel delivery to the engine. Robust Construction The sturdy canister design withstands vibration and pressure fluctuations in heavy-duty applications for long service life. Easy Cartridge Replacement Simply remove the old cartridge and insert the new P552040 into the Racor 2040™ housing—no tools or complex procedures required. Specifications: Outer Diameter: 108.5 mm (4.27 in) Inner Diameter: 21 mm (0.83 in) Length: 121.4 mm (4.78 in) Filtration Efficiency: 50% @ 10 μm (ISO 4572) Emulsified Water Separation: 95% (SAE J905) Collapse Burst Pressure: 4.1 bar (60 psi) Media Type: Cellulose Style: Spin-on cartridge (water separator) Primary Fitment: Racor 2040™ series (e.g., 2040N10, 2040SM) Typical Applications: Marine Engines: Ensures clean, dry diesel for boats and yachts using Racor 2040™ housings. Commercial Trucks & Buses: Fits diesel truck fuel systems requiring Racor 2040™ filtration. Industrial & Off-Road Equipment: Suitable for generators, forklifts, construction machinery, and other equipment using Racor 2040™ water-separating filters. Use Part No. P552040 to maintain optimal engine performance and prevent fuel-system damage in any Racor 2040™ housing application.
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