P550821 Cartridge Fuel/Water Separator for International MaxxForce 11 & 13 Engines
P550821 (FS20087) fuel water separator for International MaxxForce 11/13, A26, N13 engines. Cross reference Baldwin PF7986, WIX 33991. Factory direct.
Description
The P550821 fuel water separator (Fleetguard part number FS20087) is a cartridge-style fuel/water separator for Navistar MaxxForce 11 and MaxxForce 13 engines, including the related N13 and A26 engine designations, plus the same engine family rebadged by Caterpillar in CT-series trucks. It captures fine particulate and free water before fuel reaches the high-pressure injection system. This part is the current, updated replacement for the earlier Fleetguard FS19869, which has been obsoleted. IXIN Filter manufactures this filter to OEM-equivalent specifications, giving distributors and fleet operators a reliable, factory-direct alternative for scheduled fuel filter replacement.
As an IATF 16949-certified filter manufacturer, IXIN supplies the P550821 fuel water separator to distributors and service centers in 60+ countries, with consistent batch quality and full traceability for bulk and OEM orders.
Product Specifications
| Attribute | Detail |
|---|---|
| Product Type | Cartridge-Style Fuel/Water Separator |
| Overall Height | 173.2 mm (6.82 in) |
| Largest Outer Diameter | 90.5 mm (3.56 in) |
| Gasket Inside Diameter | 45 mm (1.77 in) |
| Bypass Valve (BPV) | No |
| Certification | IATF 16949 |
Compatible Engines & Vehicles
- Navistar MaxxForce 11 (2008–2014)
- Navistar MaxxForce 13 (2008–2014)
- International A26 and N13 engine designations (same engine family)
- Representative vehicles: International ProStar, LoneStar, LT625, 9900i (2008–2014)
- International 5600i, 7600, 8500, 8600
- Caterpillar CT610, CT660, CT680, CT681 (2011–2015)
Note: Verify your engine’s serial number and fuel system configuration against the OE part number before ordering.
P550821 Cross Reference / OE Replacement Numbers
The P550821 fuel water separator is a direct cross reference and replacement for the following OE and aftermarket part numbers:
| Brand / Source | Part Number |
|---|---|
| Donaldson | P550821 |
| Fleetguard/Cummins Filtration | FS20087 |
| Fleetguard (obsolete, earlier number) | FS19869 |
| International/Navistar OE | 3004473C91 / 3004473C92 / 3004473C93 |
| International/Navistar OE (alt.) | 2517615C91 / 3007448C1 |
| Caterpillar OE | 3762578 / 376-2578 |
| Baldwin | PF7986 |
| WIX | 33991 |
| NAPA | 3991 |
| Carquest | 86991 |
Note: FS19869 has been obsoleted by Fleetguard — FS20087 (this P550821 equivalent) is the current production part. Confirm with your parts manual which number your specific engine requires.
Why Choose IXIN’s P550821 Fuel Water Separator
- Current, Up-to-Date Specification — Manufactured to the current FS20087 specification rather than the obsoleted FS19869, ensuring you’re supplying an actively produced part number.
- Broad Engine Platform Coverage — Fits the MaxxForce 11/13, A26 and N13 engine family across International and Caterpillar-badged trucks sharing the same platform.
- Reliable Water Separation — Captures fine particulate and free water before fuel reaches the high-pressure injection system, protecting sensitive components.
- OEM-Equivalent Fit — Manufactured to match OE dimensions for the P550821/FS20087, ensuring drop-in compatibility.
- Factory-Direct Supply — As a manufacturer (not a trading company), IXIN offers stable lead times and customization options for private label, packaging and media specification. For guidance on verifying cross reference numbers and superseded part numbers before a bulk order, see our fuel filter cross reference guide.
Installation & Maintenance Notes
For International MaxxForce 11/13, A26, N13 and Caterpillar CT-series engines using the P550821 fuel/water separator, general service steps include:
- Drain any accumulated water from the separator before removing the old filter.
- Relieve fuel system pressure before removing the filter cartridge.
- Lightly oil the new gasket with clean diesel fuel before installation to ensure a proper seal.
- Install the new cartridge per the housing’s specific installation procedure.
- Prime the fuel system per OEM procedure before restarting the engine.
- Follow your specific engine’s recommended service interval.
FAQ
Q: Is the P550821 the same as FS19869? A: FS19869 is the earlier, now-obsolete Fleetguard number for this application. P550821 (Fleetguard FS20087) is the current production replacement. If your parts manual references FS19869, order P550821/FS20087 instead.
Q: Is the P550821 compatible with Caterpillar CT-series trucks? A: Yes — the CT610, CT660, CT680 and CT681 (2011–2015) use the same MaxxForce-derived engine platform badged under Caterpillar, and use this same fuel water separator.
Q: What’s the difference between IXIN’s P550821 and the OEM Donaldson/Fleetguard filter? A: IXIN manufactures this filter to match OEM dimensions and design. The main difference is price and lead time — IXIN offers factory-direct pricing for bulk and OEM orders without compromising fit or filtration performance.
Q: Can I order the P550821 with custom packaging or private label? A: Yes. IXIN supports customized packaging, labeling and media specifications for distributors and private-label buyers. Contact our sales team with your requirements.
Q: What is the minimum order quantity (MOQ)? A: MOQ varies by customization level. Get in touch with us via WhatsApp or email for current MOQ and lead time on the P550821 fuel water separator.
