Details
Cummins 6BT5.9-C150 Engine Assembly (DCEC 150HP Mechanical Diesel Engine)
The Cummins 6BT5.9-C150 remains one of the most reliable mechanical diesel engines in the global industrial market. As a 5.9L turbocharged 6-cylinder Cummins engine, it delivers a steady 110kW (150HP) at 2200 RPM. This specific C150 variant is engineered by Dongfeng Cummins (DCEC) specifically for heavy-duty off-road diesel power units, balancing simplicity with high torque density.
Compared with electronic-controlled modern engines, the C150 version maintains a mechanical injection structure, making it easier to maintain in harsh working environments and remote construction sites.
At HekoPower, this engine is supplied as a complete assembly, including tested fuel system components and turbocharging system calibration.
Tech Specs of Cummins 6BT5.9-C150
General Engine Data
Engine Model: Cummins 6BT5.9-C150
Type: 6 Cylinders in Line
Displacement: 5.9 L
Bore * Stroke: 102 * 120
Overall Dimension: 1100mm*750mm*988mm
Net Weight (with flywheel & alternator): 432 Kg
Key Performance Data
Rated Power: 112 kW/150HP
Rated Speed: 2400 rpm
Max Torque/Speed: 580 N.m @ 1500 rpm
Fuel Consumption @ Rated Power: 235 g/Kw.h
Max Continuous Running Altitude: 2000 m
More Technical Data
Certification: Euro I
Aspiration: Turbocharged
Fuel System: A Pump/ RSV Govenor
Compression Ratio: 17.3:1
Electrical System (Starter Motor/Alternator): 12V/24V
Lowest Starting Temp Without auxiliary system: -12℃
Cooling Method: Water cooled
Engine Cooling Fluid Volume: 9.9 L
Technical Comparisons: Navigating the Cummins B Series
Cummins 6BT5.9-C150 vs. 6BTA5.9
The standard 6BT5.9-C150 relies solely on turbocharging. In contrast, the 6BTA5.9 includes an "Aftercooler" (the 'A' designation).
- Heat Management: The C150 is ideal for machines with limited space where a large aftercooler cannot be mounted.
- Efficiency: The 6BTA version generally offers better fuel economy at peak loads due to cooler intake air, but the 6BT5.9-C150 is often preferred for its extreme simplicity and ease of repair in remote locations.
Difference Between Cummins 6BT5.9-C125 and C150
The C125 and C150 share the same 5.9L block but differ in their fuel pump calibration and turbocharger pressure. The C150 provides an additional 25 horsepower, making it the better choice for 20-ton excavators, whereas the C125 is typically found in smaller 15-ton units or smaller road rollers.
Real Application Scenarios: Where the 6BT5.9-C150 Excels
The 110kW 150HP Cummins industrial engine is a "universal" power source found in a wide array of heavy machinery.
Cummins Engine for 15-20 Ton Excavators
This engine is the primary replacement 6BT5.9-C150 for Zoomlion and Sany excavators. It provides the necessary hydraulic pump drive power to handle heavy bucket loads without significant RPM drops. We also frequently supply this model as a Cummins 6BT5.9 engine for Komatsu excavator replacement in regions where mechanical engines are preferred over newer electronic Tier 4 units.
Road Construction and Agricultural Use
Beyond excavators, the C150 serves as a 150HP diesel engine for road rollers and bulldozers. Its high torque at 1500 RPM allows rollers to maintain vibration frequency even on steep inclines. Additionally, it is a popular Cummins 5.9L engine for agricultural machinery pump sets, providing consistent flow for large-scale irrigation systems.
Maintenance and Replacement Tips for Longevity
Replacing a Cummins 6BT5.9 engine assembly is a significant investment. Proper installation and preventative care are the only ways to ensure you reach the 15,000-hour service life common for these blocks.
The P7100 and Weifu AD Pump Maintenance
Most of our C150 units are equipped with the P7100 injection pump or the Bosch/Weifu AD pump. These are rugged mechanical components, but they are sensitive to water contamination.
- Fuel Filtration: Always install a secondary water separator between the fuel tank and the engine.
- Lubrication: Use high-quality 15W-40 oil. The 6BT's flat-tappet camshaft design requires zinc-rich additives found in heavy-duty diesel oils to prevent premature wear.
Installation Checklist for Assemblies
When swapping a 6-cylinder inline Cummins engine, ensure you verify the flywheel housing size (SAE 2 or SAE 3) and the flywheel bolt pattern. While the block is the same, these peripheral components vary between a road roller and a concrete mixer. At HekoPower, we verify these specs with your machine's serial number before shipping.
The HekoPower Advantage: Sourcing Genuine DCEC
As a leading Cummins 5.9L mechanical diesel engine wholesale supplier in China, HekoPower bridges the gap between factory production and global equipment owners.
Understanding Price and Shipping Weight
The DCEC 6BT5.9-C150 price is influenced by the "dress level" of the engine—whether it includes the starter, alternator, and cooling fan. The shipping weight for a complete assembly is approximately 450kg (992 lbs). We utilize ISPM-15 certified wooden crates to prevent damage during sea or air freight.
Fuel Consumption Data
Operators often ask about the Cummins 6BT5.9-C150 fuel consumption per hour. In a typical 20-ton excavator application, you can expect a consumption rate of approximately 19-23 liters per hour at 75% load. This efficiency is achieved through the 16.8:1 compression ratio and precise timing of the mechanical fuel injection.
Cummins B5.9-C Series, original products from Dongfeng Cummins Engine Plant (DCEC), Cummins Joint Venture Plant since 1986, 50% shareholding by Cummins USA. This series mainly includes 6BT5.9-C115, 6BT5.9-C120, 6BT5.9-C125, 6BT5.9-C130, 6BT5.9-C135, 6BT5.9-C145, 6BT5.9-C150, 6BTA5.9-C125, 6BTA5.9-C130, 6BTA5.9-C150, 6BTA5.9-C155, 6BTA5.9-C170, 6BTA5.9-C175, 6BTA5.9-C180, 6BTAA5.9-C130, 6BTAA5.9-C150, 6BTAA5.9-C160, 6BTAA5.9-C180, 6BTAA5.9-C190, 6BTAA5.9-C195, 6BTAA5.9-C205.
Frequently Asked Questions (FAQ)
Can the 6BT5.9-C150 be used for power generation?
While this is a turbocharged construction machinery engine, it can be adapted for a generator set 100–150kW. However, it requires a constant-speed G-drive governor rather than the variable-speed RSV governor found on the industrial C150 model.
What is the difference between a "Rebuilt" and a "New" Assembly?
A rebuilt Cummins 6BT5.9 engine assembly for a loader uses a remanufactured block with new wear parts. HekoPower specializes in New Genuine DCEC units, which offer a longer lifespan and full factory warranty compared to rebuilt options.
Is the P7100 injection pump better than the VE pump?
For the 150HP rating, the P7100 (or the AD pump equivalent) is superior. It is more durable and handles higher injection pressures than the VE rotary pump, which is typically found on lower-horsepower 4BT or 6BT models.
How do I confirm the 6BT5.9-C150 torque curve?
The 6BT5.9 C150 engine torque and RPM performance curve shows a peak torque of 580 N.m at 1500 RPM. We provide the full 6BT5.9-C150 torque curve and performance datasheet upon request for engineering verification.
Why is the 6BT5.9 bore stroke 102×120 mm significant?
This "long-stroke" design is why Cummins engines are known for "lugging power." The longer stroke allows for better leverage on the crankshaft, resulting in higher torque at lower engine speeds compared to "square" or "short-stroke" engines.
