Holset 3539062 Turbocharger Assembly HX55W

The Holset 3539062 is a model HX55W turbocharger designed for the Cummins ISM11 10.8-liter inline-six engine platform. This unit integrates a pneumatic wastegate actuator for precise boost control and a water-cooled center housing to manage thermal loads in heavy-duty cycles. It utilizes a T4 turbine inlet flange and V-band compressor discharge connection. The rotating assembly is engineered for the ISM11 power range up to 440 horsepower (328 kW) with peak torque of 1,550 lb-ft (2,102 N·m). Lubrication is supplied via engine oil feed with a dedicated drain flange. The compressor wheel and turbine wheel are optimized for the ISM11 airflow requirements across the 280–500 HP rating spectrum. This assembly serves as a direct replacement for Cummins part number 3539062 and cross-references Holset service number 4036915. Applications include heavy-duty trucks from Otokar, Kenworth, and Mack equipped with the ISM11 powerplant.