Abstract: A filter assembly for filtering hydraulic fluid flow from a hydraulic fluid source such as a manifold to a hydraulic fluid receiving component, such as a servo valve, associated with the manifold. The filter assembly includes a housing which defines a cavity for receiving a filter. Passages are provided in the housing for passing hydraulic fluid from a hydraulic fluid source to a hydraulic fluid receiving component. At least one of the passages communicates with the cavity for delivering hydraulic fluid for filtering by the filter retained in the cavity. First and second adapter plates are provided and positioned between the housing and the manifold and servo valve, respectively. The first adapter plate includes passages which extend therethrough for matching ports on a hydraulic fluid source and the housing. The second adapter plate includes passages extending therethrough for matching ports on the housing and a hydraulic fluid receiving component such as a servo valve.