Holset 3529041-20 Turbocharger Assembly HT3B

The Holset HT3B turbocharger assembly (part number 3529041-20) is engineered for Cummins NTA855, NT855, N14, and NH220 series diesel engines. This water-cooled unit features a wastegate actuator for boost pressure control and is designed for high-cycle durability in severe duty cycles. Primary applications include marine propulsion, off-highway construction equipment, and power generation. Verified fitment includes Komatsu bulldozers and Shantui SD22 bulldozers equipped with the Cummins NT855-C280S10 engine, as well as Shantui excavators. The assembly serves as a direct replacement for Cummins OEM part numbers 3803270, 3801989, and 3801994. Manufactured to OEM specifications for rotor dynamics, bearing clearances, and compressor/turbine map matching.