New Old Stock (NOS) Genuine Detroit Diesel hydraulic pump coupling, part # 05135378 (also 5135378), for Series 60 engines (11.1L, 12.7L, 14L models) in buses, trucks, and heavy-duty diesel vehicles. Made OEM part is unused, in original packaging with minor shelf wear. Metal parts like gears have grease on them, this is not rust as […]