Holset 4089916 HX40 Turbocharger Assembly

The Holset HX40 is a fixed-geometry, single-stage turbocharger featuring a cast compressor housing and robust turbine section designed for heavy-duty diesel applications. This unit serves as a direct replacement for Cummins part numbers 4089916 and 4046107, and Holset part number 2837715H. It is engineered for the Cummins QSC 8.3L Pegasus engine series widely used in industrial and construction equipment. Key technical attributes include oil-cooled bearing housing, wastegated turbine housing configuration for boost control, and precision-balanced rotating assembly. The turbocharger crosses to Komatsu part number 6745-81-8050 and fits Komatsu PC200-8 and PC300-8 excavators, as well as Dongfeng Tianlong heavy-duty trucks equipped with Cummins ISLe engines. Unit weight is 16.6 kg.