Donaldson P550104 Fuel Filter

Fuel Filter for Heavy-Duty Applications

Donaldson P550104 is a spin-on fuel filter built around cellulose media and SAE J1985 efficiency testing. It is specified for Cummins 138627 applications and uses a 1-14 UN thread for service replacement.

Key Features

• Spin-on fuel filter design for straightforward service replacement.
• Cellulose media with 99% efficiency at 25 microns.
• SAE J1985 efficiency test standard for documented filtration performance.
• 5.2 collapse burst rating for demanding fuel system service.
• Primary application reference: Cummins 138627.

Detailed Description

Donaldson P550104 is a fuel filter engineered for diesel fuel system maintenance where consistent filtration and serviceability matter. The spin-on style, 1-14 UN thread, and gasket dimensions support a direct replacement format, while the cellulose media and 99% efficiency rating help capture fine contaminants before they reach sensitive fuel system components. This part number, P550104, is also cross-referenced to Baldwin BF948 for the same application. It is a practical choice for heavy-duty service work, including Kenworth K100E fuel filter replacement applications from 1985-2002.

What It Is Used For

• Removing fine debris from diesel fuel before it reaches the injection system.
• Addressing restricted fuel flow caused by a loaded filter element.
• Replacing a worn spin-on fuel filter during scheduled maintenance.
• Supporting cleaner fuel delivery in heavy-duty service conditions.

Installation Notes and Tips

Verify thread size, gasket dimensions, and the primary application reference before installation. Prime the fuel system according to service procedures after replacement, and inspect sealing surfaces for damage or contamination. Confirm fitment for Kenworth K100E models listed for 1985-2002 and match the application to the existing filter specification.

Quality Assurance

Donaldson publishes this filter to SAE J1985 efficiency testing standards, giving buyers a defined performance reference for filtration service. Part number P550104 is built for heavy-duty fuel system maintenance and application-specific replacement work.