Holset 4045371A Turbocharger HX55W Assembly

The Holset HX55W is a water-cooled, wastegated, fixed-geometry turbocharger designed for heavy-duty diesel engines in the 10 to 15 liter displacement range. This unit features a pneumatic wastegate actuator for precise boost control and a rotating compressor housing orientation to suit multiple installation configurations. The center housing rotating assembly (CHRA) utilizes full-floating bronze bearings and thrust collar for high-load durability. Primary applications include Cummins ISM, M11, QSM11, ISME, ISX2, and Signature 600 engines, as well as Detroit Diesel DD15 and Iveco Cursor 13 platforms. The assembly is validated for use in FAW J6P mining trucks and Sinotruk HOWO A7 tractors. The turbine housing incorporates a high-nickel alloy volute rated for sustained exhaust gas temperatures exceeding 950°C. Compressor wheel is forged milled aluminum (FMW) for high aerodynamic efficiency and burst containment margin. Cross-reference interchangeability covers Holset assembly numbers 3592775, 3592776, 4046025, 4045751, 4046132H, 2836376, 5609142, 4089855, 4044318, and 4955714. Corresponding Cummins OEM numbers include 2837414, 2843417, 3788677, 4046026, 4956102, 5609144, 5609145, and 5646342. Service components include CHRA cartridge 3580726 / 4027878 and minor repair kit 3575169H.