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Cummins QSB 6BT turbo HX35W 4044094 front view

HX35W 4044094 4955747 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, ISB, QSB6.7 Tier 3, CM850/CM2850; water-cooled, pneumatic wastegate

Service & Support

  • 1-Year Unlimited-Mileage Warranty
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FAQ

The HX35W (4044094 / 4955747) fits 2006+ Cummins QSB, 6BT, ISB and QSB6-7 Tier 3 engines on CM850/CM2850. OE and interchange numbers include 4044094, 4044095, 4044095H, 4955747, 495574700. If your number is not listed, send it with the old part's dataplate photo and we confirm the match before shipping.

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

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.

Cross Reference Numbers

This turbocharger replaces the following OE and interchange numbers:

  • 4044094
  • 4044095
  • 4044095H
  • 4955747
  • 495574700

Related configuration: HX35G 4042333 for CNG engines.

Installation and Care

  • Find out why the old turbo failed before installing the new one. Oil starvation or contaminated oil will destroy the replacement the same way.
  • Change the engine oil and filter. Flush or replace the oil feed line.
  • Replace the coolant O-rings at the bearing housing. Connect the coolant lines and bleed the system before startup.
  • Replace the exhaust manifold and oil drain gaskets. Prime the turbo with clean oil before startup.
  • Verify pneumatic wastegate movement before loading the engine.

See our quality process for details.

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