Donaldson P550849 Fuel/Water Separator | Cartridge

Donaldson P550849 Fuel/Water Separator Cartridge

The Donaldson P550849 Fuel/Water Separator Cartridge is a replacement cartridge designed to remove water and fine particulate contamination from diesel fuel. This heavy-duty fuel filter element is designed for use in compatible fuel/water separator assemblies and is commonly used across commercial truck, diesel engine, and equipment applications.

The P550849 provides 99% efficiency at 7 microns and is tested according to SAE J1985. Its cellulose and meltblown filter media helps capture contaminants while its water-separation capability helps protect the fuel system from damaging free water. citeturn0search23turn0search0

Because this is a cartridge-style fuel/water separator, the existing filter housing and bowl are retained while the internal filter element is replaced during service. Correct cartridge dimensions and seal positioning are important for proper installation and separator performance. citeturn0search0

Key Features

• Donaldson P550849 fuel/water separator cartridge
• Designed for diesel fuel filtration and water separation
• 99% efficiency at 7 microns
• 95% emulsified water efficiency
• SAE J1985 efficiency test standard
• Cartridge-style replacement element
• Cellulose and meltblown filter media
• Helps protect fuel injectors and fuel system components
• Designed for demanding diesel and heavy-duty applications

Specifications

• Brand: Donaldson
• Part Number: P550849
• Product Type: Fuel/Water Separator Cartridge
• Filter Style: Cartridge
• Type: Water Separator
• Efficiency: 99% at 7 Microns
• Emulsified Water Efficiency: 95%
• Outer Diameter: 4.21 in (107 mm)
• Inner Diameter: 0.66 in (16.8 mm)
• Length: 6.76 in (171.7 mm)
• Overall Length: 7.03 in (178.6 mm)
• Media: Cellulose, Meltblown
• Efficiency Test Standard: SAE J1985
• Condition: New

Common Applications

The Donaldson P550849 is used across a range of heavy-duty diesel and equipment applications. Published application information includes qualifying:

• Freightliner applications
• International applications
• Cummins engine applications
• Hitachi equipment
• Construction and industrial equipment
• Heavy-duty diesel fuel systems

Donaldson also lists the P550849 as primary fuel filtration for qualifying Cummins X15 and ISX engines, while other published application data identifies Freightliner, International, Hitachi, and additional equipment applications. citeturn0search22turn0search12

Cross Reference Part Numbers

Published cross-reference numbers for Donaldson P550849 include:

• Fleetguard: FS19763, FS19764
• Baldwin: PF7928, PF9814
• WIX: 33763, 33964
• DAVCO: 102526, 102527
• NAPA: 3763, 3964
• Luber-Finer: L9763FXL
• FRAM: CS11023
• MANN & HUMMEL: P11001X
• HIFI Filter: SN40612
• Hitachi: 4669642
• Komatsu: 79738773
• Caterpillar: 3700572
• John Deere: RECFS1976300
• VMC: FS550849

Important: Cross-reference numbers are provided for identification purposes and should not be treated as a guaranteed direct replacement without verifying the application, dimensions, and filter specifications.

Why Replace Your Fuel/Water Separator?

Water and particulate contamination can cause serious problems in modern diesel fuel systems. A properly maintained fuel/water separator helps remove contaminants before they reach sensitive fuel system components such as injectors and high-pressure fuel pumps.

Replacing the separator cartridge at the recommended service interval can help maintain fuel filtration performance, protect fuel system components, and reduce the risk of contamination-related downtime.

Why Choose Donaldson P550849?

The Donaldson P550849 is a heavy-duty fuel/water separator cartridge designed for applications where effective particulate filtration and water separation are essential. With 99% efficiency at 7 microns and 95% emulsified water efficiency, it provides dependable filtration performance for qualifying diesel fuel systems. citeturn0search23