Description
Fleetguard FS1280 is a spin-on fuel/water separator that uses StrataPore media to deliver 96% efficiency at 20 microns (SAE J1985) with 90% emulsified water separation, protecting Cummins B5.9 and ISB-series fuel systems from contamination and water damage. As genuine Cummins Filtration, it directly replaces Cummins 3890706 and crosses to Baldwin BF1280, Donaldson P551329, and Wix 33357 for non-Cummins applications.
Specifications
| Manufacturer | Fleetguard (Cummins Filtration) |
|---|---|
| Part Number | FS1280 |
| Part Type | Fuel Water Separator (Spin-On) |
| Filter Media | StrataPore |
| Filtration Rating | 96% at 20 microns (SAE J1985) |
| Emulsified Water Separation | 90% |
| Free Water Separation | 90% |
| Overall Height | 6.49 in (164.85 mm) |
| Largest OD | 3.69 in (93.73 mm) |
| Gasket OD | 2.83 in (71.88 mm) |
| Gasket ID | 2.46 in (62.48 mm) |
| Thread Size | 13/16-18 UNS-2B |
| Marine Use | Not for marine applications |
Cross References
This fuel water separator replaces or is equivalent to the following part numbers:
- Cummins: 3890706, 3903410, 3930942
- Volvo: 36846
- Mack: 5839FS1280
- Baldwin: BF1280
- Donaldson: P551329
- Wix: 33357
- Napa: 3357
- Luber-Finer: LFF3417
- Fram: P3401
- Hengst: H17WK06
- Purolator: F54423
- AGCO: 72501531
- Case IH: J925274, 84476807
Applications
This fuel water separator fits Cummins-powered equipment using the FS1280 mount:
- Cummins B5.9 / ISB (1990s-2000s on-highway and industrial)
- Cummins C 8.3L (industrial / off-highway variants)
Representative vehicles and equipment using these engines:
- Medium-duty Cummins-powered trucks and buses
- Case IH, AGCO, John Deere agricultural equipment
- Construction and industrial equipment (Gradall, Bomag, Liugong, Timberjack)
- Volvo and Mack vocational trucks with Cummins fuel systems
Verify your engine serial number and fuel filter mount before ordering to confirm fitment.
