Holset 4040587 Turbocharger HX55 Assembly

The Holset HX55 turbocharger model 4040587 is a high-efficiency forced induction unit designed for heavy-duty diesel engines in the 10 to 16 liter displacement class. It supports a power output range of 220 to 420 kW and delivers a maximum airflow of 0.75 kg/s. The unit features a fixed geometry or wastegated turbine configuration depending on specific application calibration, with oil-lubricated and water-cooled center housing rotating assembly (CHRA). This assembly supersedes and interchanges with multiple Holset service part numbers including 4040586, 1539978, 3593606, 3593607, 4024967, and 4955714. It serves as direct replacement for OEM installations on Cummins M11, ISM, QSM11 series and Detroit Diesel DD15 engines. Additional cross-references cover Scania DC12 (4044950, 4031340), Volvo D13 (4043574), and Weichai P12/P13 (612630110581) platforms. The CHRA cartridge is serviceable under part number 3535983 and repair kit 3575181.