Donaldson P625287 Engine Air Filter

Engine Air Filter Overview

Donaldson P625287 is a primary engine air filter built with RadialSeal design and cellulose media for heavy-duty air intake service. It is engineered for compatible Kenworth and Peterbilt applications that use a radialseal primary filter, including Kenworth W900, T800, and C500, plus Peterbilt 357, 378, 379, and 388.

Key Features

• Primary engine air filter with RadialSeal construction for secure sealing in the air cleaner housing.
• Cellulose filter media for dependable particle capture in demanding on-road service.
• 99.9% efficiency rating tested to ISO 5011.
• Dimensions: 22.44 in. length, 11.10 in. outer diameter, 173 mm inner diameter.
• Compatible With Kenworth and Peterbilt radialseal air filter applications.

Detailed Description

This Donaldson engine air filter is designed for heavy-duty trucks that require a primary radialseal element. The P625287 uses cellulose media and a RadialSeal style to support consistent airflow management while filtering intake air. It is a direct replacement for compatible Kenworth W900 and T800 applications, as well as Peterbilt 357, 378, 379, and 388 models listed in the fitment data. This part cross-references Baldwin RS5288 for the same application.

What It Helps Address

• Restricted airflow caused by a loaded or worn engine air filter.
• Dust and debris entering the intake system.
• Reduced filtration performance in primary air cleaner service.
• Fitment issues on radialseal-style air filter applications.

Installation Notes and Tips

Verify the air cleaner housing dimensions and filter style before installation. Confirm the application uses a primary radialseal filter and match the listed dimensions and fitment notes for the correct Kenworth or Peterbilt truck. Replace the filter according to service intervals and inspect the sealing surfaces for dirt or damage before installing the new element.

Quality Assurance

Donaldson lists this filter with 99.9% efficiency based on ISO 5011 testing, providing a documented performance standard for filtration in heavy-duty service.