QSB5.9 -Range
The Cummins QSB5.9 is a reliable, fuel-efficient, and low-emission 5.9L in-line 6-cylinder, 4-stroke diesel engine with turbocharged aftercooling and advanced electronic controls. Manufactured at the Dongfeng Cummins Plant, it is designed for construction, agriculture, marine, and industrial applications, delivering strong performance, durability, and fast load response. Key specifications include a 102 x 120 mm bore and stroke, Weifu PW/RSV fuel system, 17.3:1 compression ratio, and turbocharged & inter-cooled aspiration. Let me know if you need further specifications or parts details!
Product Introduction
Technical Specifications
| Parameter | Value |
| Engine Model | QSB5.9 |
| Configuration | In-line 6-cylinder |
| Displacement | 5.9L |
| Bore x Stroke | 102 x 120 mm |
| Compression Ratio | 17.3:1 |
| Fuel System | Weifu PW/RSV |
| Aspiration | Turbocharged & Intercooled |
| Cooling System | Water-cooled |
| Manufactured by | Dongfeng Cummins (DCEC) |
Engine Model
| Engine model | power（kw/rpm) | Weight(kg) | Size(mm) |
| QSB5.9-G3 | 120@1500 | 453 | 1300×870×1250 |
| QSB5.9-G2 | 96@1500 | 453 | 1300×870×1250 |
| QSB5.9-C130-30 | 97@2200 | 453 | 1300×870×1250 |
| QSB5.9-C150-31 | 113@2000 | 453 | 1300×870×1250 |
| QSB5.9-C160-30 | 119@2200 | 453 | 1300×870×1250 |
| QSB5.9-C170-30 | 125@2200 | 453 | 1300×870×1250 |
| QSB5.9-C180-31 | 132@2400 | 453 | 1300×870×1250 |
| QSB5.9-C190-31 | 142@2200 | 453 | 1300×870×1250 |
| QSB5.9-C210-30 | 154@2200 | 453 | 1300×870×1250 |
Key Features
- Built-in Turbocharging & Intercooling – Higher power density and improved combustion efficiency.
- Rotor-Type High-Pressure Fuel Pump – Stable fuel delivery even in harsh conditions.
- Holset Wastegate Turbo – Enhanced throttle response and reliability.
- Honed Cylinder Liners – Reduced wear, lower oil consumption, and extended lifespan.
- Modular Configuration – Simplifies installation, integration, and maintenance.
- Fuel Efficiency Optimized – Advanced air-fuel ratio design for reduced operating cost.
Applications
The Cummins QSB5.9 is trusted across industries and continents. Its compatibility with various equipment and ease of service make it a preferred choice among fleet managers and OEM engineers.
| Industry | Equipment Examples |
| Construction | Excavators, bulldozers, rollers, loaders |
| Transport | Dongfeng heavy trucks |
| Agriculture | Irrigation & water pump sets |
| Marine | Auxiliary generator & propulsion systems |
| Power Units | Mobile/Stationary engine power packs |
Why Choose Us
We are a Cummins-authorized distributor with over 15 years of field experience in diesel engine supply, integration, and post-sale support.
- Replacement Solutions for 6BT5.9, ISB5.9, and More
- 100% Genuine Cummins Engines & Parts
- Engineer Team for Sizing, Installation & Commissioning
- Global Delivery & Export Projects
- In-stock Availability – Fast Lead Times
Support & Services
Our support doesn’t stop at delivery. We help your machines run.
- Installation Guidance (Remote or On-site)
- Cross-model Replacement Advice (e.g., replacing 6BT5.9)
- Spare Parts Recommendation
- On-site Engineering Support (Available overseas)
- Warranty and Post-sale Maintenance Plans
