Description
Genuine Caterpillar 1R-1804 standard-efficiency spin-on fuel/water separator — the small-frame Cat fuel filter used on C4.4, C6.6, 3054, and 3056 industrial / off-highway engines. Cellulose media removes 100% of free water and 90% of emulsified water along with fine contaminants ahead of the secondary filter.
Signs You Need a New Fuel Water Separator
- Water-in-fuel warning illuminated
- Hard starting or extended cranking
- Loss of power or rough running under load
- Visible water in the separator drain
- Service interval exceeded (typically 250–500 hours)
Specifications
| Manufacturer | Caterpillar (Genuine OEM) |
|---|---|
| Part Number | 1R-1804 (1R1804) |
| Part Type | Fuel/Water Separator — Spin-On |
| Efficiency Rating | Standard Efficiency |
| Engine Compatibility | Cat 3054, 3056, C4.4, C6.6 industrial / off-highway |
| Media | Cellulose |
| Thread | 1-1/4″-12 UNF-2B |
| Outside Diameter | 3.43 in (87 mm) |
| Height | 8.01 in (204 mm) |
| Bypass Valve | None |
Cross References
This fuel/water separator replaces or is equivalent to the following part numbers:
- Caterpillar: 1R-0794
- Fleetguard: FS20009
- Donaldson: P551354
- Baldwin: BF7679
- Wix: 33674
- Luber-Finer: LFF6925
- Fram: K11141, PS11142
- AC Delco: TP1234
- HiFi-Filter: SN30017
Applications
This fuel/water separator fits the following Caterpillar engine families:
- Cat 3054, 3054C, 3054E (Perkins-derived industrial)
- Cat 3056, 3056E
- Cat C4.4 (industrial / Tier 4)
- Cat C6.6 (industrial / Tier 4)
Representative equipment using these engines:
- Cat compact and mid-frame excavators with C4.4 / C6.6 power
- Cat skid-steer and compact track loaders with 3054 / C4.4
- Cat backhoe loaders 416, 420, 422, 428, 430, 432 series
- Cat telehandlers and small wheel loaders
The 1R-1804 is the small-frame Cat fuel/water separator. It is NOT interchangeable with the larger Cat 1R-0750 / 175-2949 advanced-efficiency family used on heavy on-highway C-series engines. Verify your engine model and existing filter dimensions before ordering.
