Description
Baldwin B7177 full-flow spin-on lube oil filter for the Cummins B-series diesel — ISB 5.9L and QSB 5.9L engines (1998–2007). Direct replacement for Fleetguard LF3970, Cummins 3937144 / 3937736, Donaldson P550428, and WIX 57182. 12-micron nominal media, 1-1/8″-16 UN thread, 7-3/16 in tall by 3-11/16 in OD with the G401 integral gasket.
Specifications
| Manufacturer | Baldwin |
|---|---|
| Part Number | B7177 |
| Part Type | Full-Flow Spin-On Oil Filter |
| Engine Compatibility | Cummins ISB 5.9L, QSB 5.9L (1998–2007) |
| Length | 7-3/16 in (182.6 mm) |
| Outer Diameter | 3-11/16 in (93.7 mm) |
| Thread | 1-1/8″-16 UN |
| Integral Gasket | G401 |
| Nominal Micron Rating | 12 µm |
| Absolute Micron Rating | 30 µm |
Cross References
This oil filter replaces or is equivalent to the following part numbers:
- Cummins: 3937144, 3937736, 5404947
- Fleetguard: LF3970
- Donaldson: P550428
- WIX: 57182
- FRAM: PH8942
- Luber-finer: LFP3970
- NAPA: 7028
Applications
This oil filter fits the following engines:
- Cummins ISB 5.9L (1998–2007)
- Cummins QSB 5.9L industrial (1998–2007)
- Cummins B5.9 mechanical (1989–1998)
Representative vehicles and equipment using these engines:
- Ram 2500 / 3500 5.9L Cummins (1998.5–2007)
- Freightliner FL50 / FL60 / Business Class M2 (medium-duty)
- Blue Bird, IC Bus school buses with B5.9 / ISB
- Case / New Holland tractors and combines with QSB 5.9
- Komatsu / Hitachi / JCB construction equipment with QSB 5.9
Confirm engine model and oil-pan / filter-mount configuration before ordering. The B5.9 / ISB 5.9 differs from the later 6.7L Cummins, which uses a different filter.









