We are [Shanghai Liaohe Trading Co., Ltd.], a factory focused on the R&D, production and export of turbochargers. In the construction machinery and heavy-truck repair world, the Weichai WD615 is an unavoidable classic — tough, durable, and widely used. But once its turbocharger wears out, the whole machine feels like it's being choked: sluggish power, black smoke, soaring fuel consumption, slower work.
Today we introduce the Weichai 90B (GJ90B) turbocharger, built specifically for the WD615. This is not a simple "replacement part" — it is a finished product we manufacture unit by unit and inspect unit by unit, to original dimensions, interfaces and performance standards. In the pages that follow, we won't use empty words — we'll explain exactly what makes this turbocharger good, and why it deserves your choice.
The Weichai 90B (GJ90B) is a radial-flow turbocharger designed specifically for the Weichai WD615 (Steyr-platform) diesel engine. Mounted on the exhaust side, it uses the engine's hot exhaust gas to drive the turbine, which in turn drives the coaxial compressor, forcing filtered fresh air into the cylinders.
More air means more complete combustion — that is the simplest and most powerful logic of turbocharging: significantly raise power, lower fuel consumption and reduce black smoke, without increasing engine displacement.
How It Works
Exhaust-driven: high-temperature, high-pressure exhaust gas enters the turbine housing and spins the turbine wheel at high speed;
Coaxial boost: the turbine and compressor wheel share a shaft — when the turbine spins, the compressor wheel spins in sync, compressing intake air;
After-cooling into cylinder: compressed air passes through an intercooler, lowering its temperature and raising its density further before entering the cylinder to mix with more fuel;
Energy recovery: exhaust energy that would otherwise be wasted is recovered and converted into intake pressure — turning waste into power.
Why Choose It
① Direct replacement — no hassle** Manufactured strictly to original interface dimensions, it bolts on in place of your old unit with no modification or machining. For repair shops and owners, that means less downtime and lower labor cost.
② Stable boost — no surge under heavy load** A radial turbine paired with a blade compressor delivers a max pressure ratio of 3.8. Whether a loader is digging a full bucket, a truck is climbing a grade, or a construction machine is accelerating hard after long idling, boost pressure stays stable with no noticeable surge or drop.
③ Solid build — heat-resistant and fatigue-proof** The compressor housing uses high-strength cast aluminum — light weight, fast heat dissipation. The turbine housing uses heat-resistant cast iron, withstanding sustained exhaust temperatures above 600°C without cracking or deforming. The center housing uses forced lubrication for a stable oil film at high RPM, low wear and long life.
④ Balanced rotor — smoother operation** The turbine wheel and compressor wheel are precision-balanced as a complete assembly, minimizing vibration and noise at high speed, reducing shaft wear and extending service life.
⑤ 100% inspected — ready to install** Every unit goes through assembly, rotation and interface checks before leaving the factory — no unit ships with defects. Every unit you receive is a finished product ready to install.
Core Components
- Turbine wheel: heat-resistant alloy, radial-flow design — fast response, high efficiency; - Compressor wheel: blade design — high flow, high pressure ratio, excellent intake efficiency;
- Center housing (CHRA): forced oil lubrication with floating bearings — stable and reliable at high RPM;
- Compressor housing: cast aluminum — lightweight, good heat dissipation;
- Turbine housing: cast iron — heat-resistant, thermal-fatigue-proof;
- Seals and fasteners: high-temperature seals prevent oil and gas leaks; fasteners are rust-proof treate
Manufacturing & Quality Control
As the manufacturer, we know that a turbocharger is a "heart-level" component spinning at extreme speed — the precision of one wheel, the torque of one bolt, can decide thousands of hours of service life. That is why every step of our process follows strict standards:
1. Precision casting: housings are produced with high-quality casting processes, with strict control over material composition and casting defects to ensure heat resistance, pressure capability and dimensional stability;
2. CNC machining: all critical mating surfaces are CNC-machined for precise fit with the engine interface and consistent assembly;
3. Rotor dynamic balancing: every rotating assembly is individually dynamically balanced to ensure smooth, low-vibration, low-noise operation at high speed;
4. Assembly inspection: after assembly, each unit is checked for rotation smoothness, sealing performance and interface integrity; 5. **Final inspection**: appearance, assembly, rotation and interfaces are checked unit by unit — only qualified units are packed and shipped.
Fitment & Applications
This turbocharger fits the Weichai **WD615 (Steyr)** engine platform. Typical applications include:
- Construction machinery: LiuGong 50 and similar 5-ton wheel loaders;
- Construction equipment: 50-series machines, motor graders on WD615 power;
- Heavy trucks: Steyr-series trucks and derivatives;
- Replacement market: overhaul kits, exchange units, routine service replacement. Before ordering, please verify your original part number and inlet/outlet orientation. Not sure? Send us your OEM number or photos — our technical team will confirm.
Why Our Factory
1. Direct from factory, honest pricing: no middlemen — casting, machining, assembly and testing are all in-house, giving us competitive pricing and stable lead times;
2. Specialist focus: turbochargers are all we do, and we do them exceptionally well;
3. Strict quality control: from raw materials to finished products, every step has inspection standards — defective units never leave the factory;
4. Reliable service: pre-sale selection, responsive sales, and after-sales technical support — someone is responsible at every stage;
5. Customization supported: OEM/ODM customization available — models, packaging and labeling can be adjusted to customer needs;
6. Long-term supply: stable supply chain and production capacity support long-term bulk orders — we grow together with our customers.
