QSB5.9 Diesel Engine
QSB5.9 is a 5.9L in-line 6-cylinder fully electronic turbocharged and air-to-air aftercooled diesel engine engineered specifically for off-highway construction machinery, widely used as the core power for excavators, loaders, rollers, and graders. It stands out for its efficient power output, proven reliability, and excellent adaptability to working conditions, making it a mainstream choice for construction equipment worldwide.
Key Specifications
- Configuration: 6-cylinder in-line, four-stroke
- Displacement: 5.9 liters
- Bore × Stroke: 102 mm × 120 mm
- Aspiration: Turbocharged + air-to-air aftercooled (AA)
- Fuel System: High-pressure common rail electronic fuel injection
- Rated Power: 130–210 hp (97–157 kW)
- Rated Speed: 2200–2600 rpm
- Max Torque: 650–800 N·m (at 1400–1600 rpm)
- Cooling System: Liquid-cooled
- Lubrication System: Pressure lubrication
- Applications: Excavators, loaders, rollers, graders, and other off-highway construction machinery
Key Technologies & Advantages
- Power & Fuel Efficiency
- Equipped with a high-pressure common rail electronic fuel injection system for precise fuel delivery and complete combustion, delivering robust power while achieving excellent fuel economy to reduce long-term operating costs.
- Paired with a turbocharger system, it provides quick low-speed torque response to handle load changes in complex job site conditions, making excavation and loading operations more efficient.
- Structural Reliability & Durability
- A high-strength cast iron block combined with a modular design offers excellent impact and fatigue resistance, enabling long continuous heavy-duty operation with extended maintenance intervals and lower total lifecycle costs.
- Reinforced pistons, connecting rods, and bearing systems, along with optimized oil cooling and filtration, maintain stable performance under high-temperature and high-load conditions, minimizing downtime due to failures.
- Working Condition Adaptability
- Customizable cooling systems and intake/exhaust layouts are available to flexibly adapt to the engine room space and heat dissipation requirements of different equipment, ensuring easy installation.
- Minimal power loss at high altitude and high temperatures, enabling operation in diverse global regions.
- Maintenance & Service Support
- Modular component design ensures high commonality of core parts, making spare parts easily accessible. Maintenance does not require full engine teardown, significantly reducing downtime.
- Multi-scenario Adaptability
- Customizable power tuning and speed configurations are available to balance power and operating efficiency, adapting to the needs of different types of construction machinery.
Quality Assurance & Compliance
Warehouse Storage
FAQ
A: Our core business covers diesel engine development, production, customized modification, maintenance and testing; explosion-proof engine R&D and manufacturing; Cummins spare parts supply, as well as engine overhaul and testing services.
A: Export-standard wooden box packaging
A:The specific delivery time depends on the items and the quantity of your order. We will confirm it with your detailed order.
A. Please provide us with your engine model, required rated power and speed, and application scenario. We will then recommend the most suitable model based on those information.
A: We offer professional engine customization services and can fully tailor the products to your specific requirements, with a variety of options available for pricing, specifications and configurations. The minimum order quantity (MOQ) for customized engines is 1 unit.
A:Yes, every engine is subjected to rigorous and comprehensive performance tests prior to shipment. We also provide clients with detailed test videos and electronic data.
A: EXW, FOB, CFR, CIF，DDU，DDP.
A: T/T, X Transfer, L/C, MoneyGram, PayPal, Cash etc
A:Yes, the warranty period is 6 months, covering main engine components. Consumable parts and failures caused by improper operation are excluded.
