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Donaldson P550821 Fuel Filter
| Brand | Donaldson P550821 |
|---|---|
| Efficiency 50% | 3 |
| Efficiency Test Std | Sae j1985 |
| Inner Diameter | 1.77 |
| Length | 143.5 |
| Outer Diameter | 3.74 |
| Overall Length | 183.6 |
| Primary Application | Navistar 3004473c91 |
| Style | Cartridge |
| Fits | — |
Cartridge style. A fuel filter format built for straightforward service.
SAE J1985 tested. Efficiency is verified to a recognized industry standard.
Donaldson quality. Trusted filtration from a leading filter brand.
Cross-references Baldwin PF7986, Four Seasons 33991 and Global Parts Distributors LLC 3991 for the same application. See all 9.
Donaldson P550821 Fuel Filter Overview
The Donaldson P550821 fuel filter is a cartridge-style filter built for fuel system service where clean fuel flow matters. It uses a 3% efficiency rating tested to SAE J1985 and is specified with a primary application of NAVISTAR 3004473C91.
For buyers searching for a Donaldson fuel filter for Navistar applications, P550821 offers a direct replacement reference with dimensions that help confirm the correct cartridge before ordering.
Key Features
- Part number: Donaldson P550821
- Cartridge-style fuel filter
- Efficiency rating: 3% at SAE J1985 test standard
- Inner diameter: 1.77 in
- Outer diameter: 3.74 in
- Length: 143.5 mm
- Overall length: 183.6 mm
- Primary application reference: NAVISTAR 3004473C91
Detailed Description
Donaldson P550821 is a fuel filter cartridge intended for fuel delivery service where dimensional accuracy and application matching are important. The listed measurements, including the 1.77-inch inner diameter and 3.74-inch outer diameter, help verify fit during replacement work on Navistar fuel system service. If you are cross-shopping a Donaldson P550821 fuel filter for Navistar 3004473C91 applications, this part also cross-references Baldwin PF7986 for the same application.
Search terms such as Donaldson fuel filter cartridge, Navistar fuel filter replacement, and P550821 fuel filter are commonly used by technicians and parts buyers looking for the correct service part for diesel fuel filtration maintenance.
What This Fuel Filter Helps Address
- Restricted fuel flow caused by a loaded or contaminated filter element
- Fuel system service intervals that require cartridge replacement
- Application matching for Navistar 3004473C91 fuel filter service
- Dimensional mismatch when replacing a cartridge-style fuel filter
- Fuel delivery issues related to debris in the filtration path
Installation Notes and Tips
Confirm the cartridge dimensions against the existing filter housing before installation. Verify the primary application reference, NAVISTAR 3004473C91, and compare the old filter’s inner diameter, outer diameter, and overall length to the specifications listed for P550821. For best results, follow the vehicle service procedure for fuel system maintenance and inspect sealing surfaces during replacement.
Quality Assurance
Donaldson publishes this filter with SAE J1985 efficiency testing data and application-specific dimensional information to support accurate parts selection. Use the part number P550821 and the Navistar reference together when confirming the correct fuel filter for service.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| No rows match your filter. | ||||