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Cummins QSB 6BT turbo HX35W 4044094 front view

HX35W 4044094 Turbocharger for Cummins QSB 6BT Tier 3

The HX35W is a Holset turbocharger for the Cummins QSB, 6BT, ISB, and QSB6.7 Tier 3 engines — the smaller Cummins diesel platforms used in light and medium trucks, construction equipment (Hyundai wheel loaders, Komatsu), agricultural machines, and industrial applications. This is a compact, wastegated turbo with a water-cooled bearing housing. Holset number 4044094/4044095, Cummins OEM 4955747. Our HX35W ships new with all new components including the pneumatic wastegate actuator, dynamically balanced, with gaskets. We supply shops, equipment dealers, and distributors.

Turbo Model

HX35W (fixed geometry, wastegated, water-cooled)

OEM / Interchange Numbers

4044094, 4044095, 4044095H, 4955747, 495574700

Application

2006- Cummins QSB, 6BT 5.9L, ISB, QSB6.7 Tier 3, CM850/CM2850

Service & Support

  • 1-Year Unlimited-Mileage Warranty
  • US Stock, Fast Dispatch
  • Bulk Orders Welcome
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FAQ

The HX35W (4044094 / 4955747) fits the Cummins QSB, 6BT, ISB, B5.9, 4BT3.9, and QSB6.7 Tier 3 engines on the CM850/CM2850 platform, from 2006 onward.

No. The HX35G is for Cummins ISL/ISLG CNG (natural gas) engines. The HX35W is for diesel QSB/6BT applications. Different part numbers, different engine calibrations. Always match by part number.

Yes. Ships complete with the pneumatic wastegate actuator and mounting gaskets.

Hyundai HL740/HL757/HL760 wheel loaders, various Komatsu equipment, Steyr vehicles, medium-duty trucks, and industrial applications running the QSB or 6BT Tier 3 engine.

Brand new, 100% new components, dynamically balanced. No core charge. One-year unlimited-mileage warranty.

Yes. US stock, volume pricing for shops, equipment dealers, and distributors.

HX35W for Cummins QSB and 6BT: Compact Turbo for Light and Medium Applications

The Cummins QSB and 6BT engines run in everything from Hyundai wheel loaders to delivery trucks to Steyr military vehicles. The HX35W is the stock turbo for the Tier 3 emissions era. It is physically smaller than the HX40W and HX55 used on larger Cummins engines, matched to the 5.9-6.7L displacement range.

Which engines use this HX35W?

EngineDisplacementPlatform
QSB Tier 35.9-6.7LCM850 / CM2850
6BT / 6BT5.95.9LVarious
ISB / B5.95.9LVarious
QSB6.76.7LCM850 / CM2850
4BT3.9 / B4.53.9-4.5LVarious

Common equipment applications include Hyundai HL740/HL757/HL760 wheel loaders, Komatsu machines, and various Tier 3 industrial and vocational trucks.

HX35W vs HX35 vs HX35G — different turbos for different engines

Holset makes several HX35 variants. The HX35W (this page) is for QSB/6BT diesel applications. The HX35G is for ISL natural gas (CNG) applications. Standard HX35 models without the W are typically non-water-cooled. Always match by part number — do not assume interchangeability within the HX35 family.

Features

  • Pneumatic wastegate — regulates peak boost via a diaphragm canister connected to intake manifold pressure.
  • Water-cooled bearing housing — coolant passages protect the bearings from heat, extending turbo life in demanding construction and industrial applications.
  • Compact size — fits the tight engine bays common on medium-duty trucks and construction equipment.

Installation

  • Ships with wastegate actuator and gaskets.
  • Replace coolant O-rings at the bearing housing. Bleed coolant system.
  • Flush oil feed line. Replace oil drain gasket.
  • Test wastegate actuator movement after install.
  • Prime with clean oil, idle 3-5 minutes before loading.

See our quality process for details.

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