Description
Fleetguard FF5324 spin-on fuel filter — direct replacement for Caterpillar 1R0751 and 1R0759 — for Cat 3126, 3126B, 3126E, and C7 medium-duty diesel engines. 98.7% efficiency at 5 micron (SAE J 1985), 7/8-14 UNF-2B thread, 7.09 in overall height. Also a drop-in replacement for AirDog FF100-2 / FF100-10 in aftermarket lift-pump systems.
Specifications
| Manufacturer | Fleetguard (Cummins Filtration) |
|---|---|
| Part Number | FF5324 |
| Part Type | Spin-On Fuel Filter |
| Engine Compatibility | Caterpillar 3126, 3126B, 3126E, C7 |
| Micron Rating | 5 micron (SAE J 1985) |
| Efficiency | 98.7% TWA (SAE J 1985) |
| Overall Height | 7.09 in (180.09 mm) |
| Outer Diameter | 3.18 in (80.77 mm) |
| Gasket OD | 2.52 in (64.01 mm) |
| Gasket ID | 2.26 in (57.40 mm) |
| Thread Size | 7/8-14 UNF-2B |
| Upgrade Option | Fleetguard FF5815 |
Cross References
This part replaces or is equivalent to the following part numbers:
- Caterpillar: 1R0751, 1R-0751, 1R0759, 1R-0759
- AirDog / PureFlow: FF100-2, FF100-10
- Baldwin: BF7634
- Donaldson: P551315
- Wix: 33626
- NAPA: 3626
- Carquest: 86626
- FRAM: P8451
- Luber-Finer: LFF4783
- Hastings: FF1087
- Mann-Filter: WK 850/3
- Alliance / Freightliner: ABPN10GFF5324
Applications
This fuel filter fits the following Caterpillar diesel engines:
- Caterpillar 3126, 3126B, 3126E (1995–2003)
- Caterpillar C7 (2003–2009)
Representative vehicles using these engines:
- Freightliner FL-Series, Business Class M2, FS-65 school bus chassis
- Ford F-650, F-750 medium-duty trucks
- GMC/Chevrolet C6500, C7500, T6500, T7500
- Sterling Acterra
- Kenworth T270, T300, T370
- Peterbilt 325, 330, 335, 337, 340, 348
- Blue Bird, IC Bus, Thomas Built school buses
- Caterpillar wheel loaders, motor graders, excavators (industrial)
Also a direct replacement for AirDog FF100-2 / FF100-10 elements used in AirDog II, II-4G, and Raptor lift-pump systems on Dodge Cummins, GM Duramax, and Ford Powerstroke pickups.
Verify your engine serial number and fuel system configuration before ordering to confirm fitment.









