Donaldson P557440 Fuel Filter

Fuel Filter Overview

Donaldson P557440 is a spin-on fuel filter for heavy-duty diesel applications. It is built for secondary fuel filtration and matches the listed fitment for Kenworth, Peterbilt, and Ford trucks across multiple model years.

Key Features

• Spin-on fuel filter design for straightforward service replacement.
• Cellulose filter media for fuel filtration in diesel systems.
• 99% efficiency rating tested to SAE J1985.
• 100 collapse burst rating for structural strength under pressure.
• 1-14 UN thread size with 3.66 in. outer diameter.
• Primary application references Komatsu 6003118290.

Detailed Description

This Donaldson fuel filter, part number P557440, is a spin-on secondary filter used in heavy-duty fuel systems. The listed dimensions include a 174 mm length, 3.66 in. outer diameter, and gasket dimensions of 2.44 in. inner diameter and 2.83 in. outer diameter. With cellulose media and SAE J1985 efficiency testing, P557440 is specified for diesel filtration service where consistent fuel cleanliness is required. This part number P557440 also cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Restricted fuel flow caused by a loaded or contaminated filter.
• Fuel contamination that can affect injector and pump performance.
• Service intervals that require a replacement spin-on filter.
• Secondary filtration needs in heavy-duty diesel fuel systems.

Installation Notes and Tips

Compatible with listed Kenworth, Peterbilt, and Ford truck applications, including models such as Kenworth T800, Peterbilt 379, and Ford L9000. Verify thread size, gasket dimensions, and filter envelope before installation. Use the vehicle service procedure for priming and leak checks after replacement.

Quality Assurance

Donaldson is a recognized filtration brand with broad heavy-duty coverage. P557440 is built to the stated efficiency and collapse-burst specifications and is identified for the listed applications by part number.