Details
DCEC Cummins 6LTAA9.5-G3 Generator Engine (250kW / 300kVA)
When building or replacing a power system in the 250 kW to 265 kW range, the Dongfeng Cummins 6LTAA9.5-G3 stands out as a highly reliable 9.5-liter diesel engine. As an authorized supplier, HekoPower provides this complete engine assembly specifically configured for continuous and standby generator sets. Operating at either 1500 RPM for 50 Hz markets or 1800 RPM for 60 Hz applications, this turbocharged intercooled engine delivers stable power output even under demanding load conditions. We supply the genuine DCEC 6LTAA9.5-G3 generator drive engine complete with essential cooling and fuel delivery components, ensuring seamless integration for OEM generator manufacturers and maintenance teams worldwide.
Tech Specs of Cummins 6LTAA9.5-G3
General Engine Data
Engine Model: Cummins 6LTAA9.5-G3
Type: 6 Cylinders in Line
Displacement: 9.5 L
Bore * Stroke: 116 X 148 mm (4.48 X 5.82 in)
Net Weight (with flywheel & alternator): 945 Kg
Overall Dimension: 2110mm*1102mm*1598mm
Key Performance Data
Rated Power/Speed 1: 250 kW/335HP (1500 RPM)
Rated Power/Speed 2: 265 kW/355HP (1800 RPM)
Fuel Consumption (50Hz): 56L/h
Fuel Consumption (60Hz): 63L/h
More Technical Data
Aspiration: Turbocharged-Intercooled
Fuel System: BYC PB Type Injection Pump + RSV Governor
Electrical System: 24V
Lowest Starting Temp Without auxiliary system: -12℃
Cooling Method: Water cooled
Engine Cooling Fluid Volume: 34 L
Compression Ratio: 16.6:1
Technical Advantages of the 9.5L G-Drive Engine Platform
The engineering behind the 6LTAA9.5-G3 generator engine focuses heavily on thermal efficiency and mechanical reliability. Its 116.5 x 148 mm bore and stroke ratio provides excellent low-end torque characteristics. This is particularly important for gensets that need to handle sudden step-loads without significant voltage or frequency drops.
Fuel Delivery and Governing Systems
Unlike newer electronically controlled engines that require complex diagnostic software, the Cummins 6LTAA9.5-G3 fuel system relies on a robust mechanical setup. It utilizes a reliable BYC PB injection pump paired with an RSV mechanical governor. While an electronic governor can be fitted for stricter frequency control, the standard mechanical fuel pump is heavily favored in remote or harsh environments. It resists fuel contamination better than common-rail systems and simplifies field repairs. Furthermore, the 6LTAA9.5-G3 fuel consumption at 1500 RPM is highly competitive, rated at approximately 64 L/h at 100% ESP (Emergency Standby Power), allowing for extended run times between refueling intervals.
Cooling and Aspiration
Heat management is critical for a 335 HP generator engine running continuously. The Cummins 6LTAA9.5-G3 air-air intercooler setup maximizes combustion efficiency by significantly lowering intake manifold temperatures. This turbocharged intercooled engine configuration not only improves the 6LTAA9.5-G3 continuous power rating but also reduces exhaust emissions and thermal stress on the cylinder head. When you source this engine from HekoPower, we can supply the 6LTAA9.5-G3 G-Drive engine with radiator and air cleaner kit pre-matched to the engine's thermal rejection requirements, saving you critical engineering time.
Cummins 6LTAA9.5-G3 Generator Engine Matching and Sizing
Selecting the correct alternator to pair with the 6LTAA9.5-G3 genset engine requires careful attention to the engine's power curve. Many buyers mistakenly assume that any 300 kVA generator can utilize this engine. However, proper generator sizing depends heavily on the application type—prime versus standby.
The 6LTAA9.5-G3 for 250 kW generator applications is an ideal match for prime power duty. In this scenario, the engine can handle variable loads for an unlimited number of hours per year, provided it adheres to the recommended 10% overload capacity for one hour in every twelve. If you are designing a standby system, the engine can be pushed slightly higher. It is frequently used as the primary power source for 275 kVA generator or 300 kVA generator sets in emergency backup situations where the engine will only run during utility outages. The engine flywheel SAE1 dimensions and weight make it directly compatible with leading alternator brands like Stamford, Leroy-Somer, and Marathon, ensuring a straightforward coupling process.
Technical Comparisons: 6LTAA9.5-G3 vs. Related Cummins Models
When evaluating the Cummins 9.5L G-drive engine comparison, procurement managers frequently ask how the 6LTAA9.5-G3 stacks up against similar models in the Dongfeng Cummins lineup. Understanding these differences is crucial for avoiding costly under-sizing or unnecessary over-spending.
Cummins 6LTAA9.5-G3 vs 6LTAA8.9-G3
A common misconception is that the older 8.9-liter platform offers the same performance as the 9.5-liter series. The Cummins 6LTAA9.5-G3 vs 6LTAA8.9-G3 power output upgrade is substantial. The increased displacement to 9.5 liters provides a noticeable improvement in block load acceptance. If your facility operates heavy motor loads, such as large water pumps or industrial chillers that demand high starting currents, the 6LTAA9.5-G3 recovers its RPM much faster than the 8.9L version, preventing alternator voltage dips.
6LTAA9.5-G3 vs 6LTAA9.5-G1 Power
Another frequent point of confusion is the difference within the 9.5-liter family itself. When analyzing the 6LTAA9.5-G3 vs 6LTAA9.5-G1 power ratings, the G3 model is calibrated for significantly higher output. The G1 is typically suited for smaller 200 kW applications. Attempting to tune a G1 engine to reach G3 performance levels by adjusting the fuel pump is highly discouraged, as the internal cooling galleries and turbocharger specifications differ. If you need a reliable Cummins 250 kW G-drive engine, always specify the G3 model directly from the factory.
Real Application Scenarios and Supplier Value
The versatility of the 6LTAA9.5-G3 complete engine makes it a top choice across various demanding sectors. HekoPower regularly supplies this exact model to clients operating in challenging environments.
For telecommunications infrastructure in remote regions, a 6LTAA9.5-G3 50 Hz genset provides the necessary continuous power when grid electricity is unreliable or non-existent. The engine's tolerance for varying fuel qualities, thanks to its robust mechanical fuel pump, minimizes downtime in areas where ultra-low sulfur diesel is difficult to procure.
In the construction and mining sectors, the engine is frequently utilized as a 6LTAA9.5-G3 replacement generator engine for mobile power towers. Its compact engine dimensions and manageable engine weight allow for easier installation into standard sound-attenuated canopies without requiring oversized chassis designs. As a direct DCEC 6LTAA9.5-G3 engine supplier, HekoPower ensures that your replacement engine assembly matches your existing footprint, minimizing modification costs during an engine overhaul or repower project. We monitor the 6LTAA9.5-G3 lead time closely, often maintaining stock or securing rapid factory allocation to keep your projects on schedule.
Maintenance, Overhaul, and Replacement Tips
Maximizing the lifespan of your Cummins 335 HP generator engine requires adhering to strict maintenance intervals, particularly concerning filtration and cooling. The most common cause of premature failure in this series is neglecting the air-air intercooler. Dust accumulation on the intercooler fins drastically reduces efficiency, leading to elevated exhaust gas temperatures that can eventually warp the exhaust manifold or damage the turbocharger.
When the time eventually comes for a major rebuild, sourcing a genuine Cummins 6LTAA9.5-G3 engine overhaul spare parts kit is critical. Avoid mixing aftermarket pistons or piston rings with genuine liners, as the thermal expansion rates often differ, leading to catastrophic scoring. For major failures, purchasing a 6LTAA9.5-G3 wholesale engine complete assembly from HekoPower is frequently more cost-effective and faster than attempting a complete block machining and rebuild on-site.
Explore the Complete Cummins L9.5-G Generator Engine Series
While the 6LTAA9.5-G3 is an exceptional choice for 250 kW requirements, your specific power generation needs may dictate a slightly different capacity. The broader Dongfeng Cummins 9.5-liter family offers a range of power nodes engineered with the same robust architecture and reliability.
Cummins L9.5-G Series, original products from Dongfeng Cummins Engine Plant (DCEC), Cummins Joint Venture Plant since 1986, 50% shareholding by Cummins USA. This series mainly includes 6LTAA9.5-G1, 6LTAA9.5-G3.In accordance with the criteria of Machinery Safety Directive 2006/42, movable elements such as distribution belts, fans, and parts that acquire high temperatures during operation, such as exhaust manifolds, have their respective safeguards. Before being delivered, the generator is thoroughly checked at the factory. Voltage, frequency, and load are all tested, as well as the appropriate operation of warnings and the influence of engine oil temperature on stop.
Frequently Asked Questions (FAQ)
Is the Cummins 6LTAA9.5-G3 suitable for both 50 Hz and 60 Hz operation?
Yes, the engine is highly adaptable. A 6LTAA9.5-G3 1500 RPM engine configuration is used for 50 Hz power generation, delivering around 250 kW of continuous power. By adjusting the governor and fuel settings, a 6LTAA9.5-G3 1800 RPM engine setup provides power for 60 Hz markets, often reaching up to 265 kW.
What type of fuel injection system does this engine use?
It utilizes a traditional mechanical fuel injection system, specifically a BYC PB injection pump. This is preferred in many global markets for its simplicity, ease of field maintenance, and high tolerance for lower-grade diesel fuels compared to high-pressure common rail electronic systems.
Does HekoPower provide the engine with a cooling package?
Yes. When purchasing the original Cummins 6LTAA9.5-G3 engine from us, you can specify whether you need the bare engine block or a complete power unit. We can supply the engine integrated with the correct radiator, cooling fan, and air cleaner kit.
How do I verify the authenticity of the engine?
Every genuine DCEC 6LTAA9.5-G3 engine features a factory-stamped metallic nameplate detailing the Engine Serial Number (ESN) and exact build specifications. HekoPower guarantees the authenticity of all units, and this ESN can be verified directly through Cummins global service networks.
