Donaldson P550553 Fuel Filter

Fuel Filtration for Heavy-Duty Applications

Donaldson P550553 is a spin-on fuel filter and water separator built for heavy-duty fuel systems. It is specified for Ford medium- and heavy-duty trucks and cross-references common OE-style part numbers for the same application.

Key Features

• Spin-on fuel filter with integrated water separation
• SAE J1985 efficiency testing standard
• 40% efficiency at 99% capture rating
• 95% emulsified water separation efficiency
• 1-14 UN thread size for service replacement
• Primary application cross-reference: Motorcraft FD4597
• Not for marine applications

Detailed Description

P550553 is a Donaldson fuel filter water separator designed as a spin-on service part for diesel fuel systems that need particulate filtration and water removal in one unit. The filter uses a 1-14 UN thread, a 3.69-inch outer diameter, and a 158.2 mm length, with gasket dimensions of 3.14 inches inner diameter and 3.47 inches outer diameter. It is built to meet SAE J1985 test standards and is listed with 100 collapse burst performance. This part cross-references Monroe Shocks & Struts (e.g., FD4597, BF7806) for the same application.

Common Uses

• Fuel contamination from dirt and debris
• Water in diesel fuel
• Reduced fuel system protection from clogged filtration
• Service replacement for spin-on fuel filter assemblies
• Maintenance on Ford F-650 and Ford F-750 fuel systems

Installation Notes and Tips

Verify thread size, gasket dimensions, and overall filter length before installation. Confirm the application is not marine use, since this part is marked not for marine applications. Match the service part to the listed Ford F-650, Ford F-750, and related Ford L-series fitments before replacement.

Quality Assurance

Donaldson publishes this filter with SAE J1985 testing and defined performance ratings for filtration and water separation. Use the listed specifications and fitment data to confirm the correct replacement for the intended service application.