GF7949 is an aftermarket fuel filter element, commonly cross-referenced to the John Deere OEM number RE522878 (and its equivalents RE524723, Donaldson P551422, Baldwin BF7949-D, and Fleetguard FS19976) . It is a secondary (final) fuel filter designed to provide the last stage of diesel filtration before fuel reaches the engine's high-pressure injection system.
