Description
Fleetguard FS19966 is a spin-on fuel/water separator for Volvo D11 and D13 engines and Mack MP7 and MP8 platforms (pre-EPA17). Cummins Filtration is the OEM filter supplier for Volvo and Mack, and the FS19966 separates water and removes particulate contamination before fuel reaches the high-pressure injection system, protecting injectors from premature wear.
Signs You Need a New Fuel Water Separator
- Water-in-fuel warning light illuminated
- Hard starting, rough idle, or hesitation under load
- Reduced fuel economy or loss of power
- Visible water or sediment when draining the housing
- Exceeded recommended service interval
Specifications
| Manufacturer | Fleetguard (Cummins Filtration) |
|---|---|
| Part Number | FS19966 |
| Part Type | Fuel/Water Separator (Spin-On) |
| Engine Compatibility | Volvo D11, D13; Mack MP7, MP8 (pre-EPA17) |
| Length | 5.03 in (127.8 mm) |
| Outside Diameter | 4.39 in (111.5 mm) |
| Thread Size | 1-14 UNS-2B |
Cross References
This part replaces or is equivalent to the following part numbers:
- Volvo: 21380475, 21380472, 20879806, 21764966
- Mack: 21380521, 21017305, 20863191, 20539578
- Renault: 7420998346, 7421380472, 7421764968
- DAF: 1533893
- UD Trucks: 5221380479, 164009Z00C
- Baldwin: BF1386-O
- Donaldson: P550913, P551838
- WIX: 33995
- NAPA: 3995
- Luber-Finer: LFF3358
- Fram: PS10678
- Mann: WK11001X
- Hengst: H328WK
Applications
This fuel water separator fits the following engines:
- Volvo D11 11.0L (2008–2016)
- Volvo D13 12.8L (2008–2016)
- Mack MP7 11.0L (2008–2016)
- Mack MP8 13.0L (2008–2016)
Representative vehicles using these engines:
- Volvo VNL 300/400/630/670/730/780, VNM, VHD, VNX (2008–2016)
- Mack Pinnacle CXU612/CXU613 (2008–2016)
- Mack Granite GU713/GU714/GU812/GU813 (2008–2016)
- Mack CHU612/CHU613 (2008–2016)
- Mack Titan TD713 (2008–2016)
For 2017 and newer Volvo D11/D13 and Mack MP7/MP8 (EPA17+), see Fleetguard FS20132. Verify part number on existing filter before ordering.









