Caterpillar 1R-1804 Fuel Water Separator Assembly

The Caterpillar 1R-1804 is a standard-efficiency spin-on fuel water separator designed for small-frame Cat diesel engines. It utilizes cellulose filter media to eliminate 100 percent of free water and 90 percent of emulsified water, along with fine contaminants, protecting downstream fuel filters and injectors. This filter features a bypass valve setting of none, ensuring full flow filtration under all operating conditions. It serves as a direct replacement for the original equipment filter on Caterpillar C4.4, C6.6, 3054, 3054C, 3054E, 3056, 3056E, and C7.1 industrial and off-highway engines. The unit is engineered for consistent fuel flow and extended service intervals in rugged construction and industrial applications.