Holset 4050212 Turbocharger HX40W

The Holset HX40W turbocharger assembly (part numbers 4050212, 4050217) is engineered for Cummins C-series 8.3L diesel engines including 6CT, 6CTA, and 6CTAA configurations rated up to 260 hp. It utilizes a fixed-geometry turbine housing with an integrated pneumatic wastegate actuator for boost pressure control. The compressor wheel delivers a maximum airflow capacity of approximately 0.53 kg/s, supporting displacements up to 12.0 liters. The unit features a dual-bearing rotating assembly with oil-cooled center housing and water-cooled turbine housing options depending on application. This turbocharger serves as original equipment for Cummins industrial, automotive, and generator set applications. Major cross-reference part numbers include Holset 4038421, 4041406, 4955252, and Cummins 3535665H, 3533010, 6743-81-8040, 4051033. The CHRA (Center Housing Rotating Assembly) service part number is 4031321. Typical equipment fitments include Kenworth heavy-duty trucks, Vermeer and Tadano cranes, Massey Ferguson and New Holland agricultural machinery, and various generator sets.