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Buy Genuine Cummins 6BTAA5.9-G2 Engine Assembly (120kW)
The Cummins 6BTAA5.9-G2 G-Drive engine is a mechanical masterpiece for heavy-duty power generation. As an authorized Dongfeng Cummins (DCEC) generator engine supplier and exporter in China, HekoPower keeps complete engine assemblies in stock, ready for immediate shipment worldwide. Whether you need a replacement engine for a broken 150kVA genset or you are an OEM manufacturer building a brand-new industrial diesel generator engine, this 5.9L six-cylinder generator engine offers unparalleled structural reliability.
Tech Specs of Cummins 6BTAA5.9-G2
General Engine Data
Engine Model: Cummins 6BTAA5.9-G2-120kw
Type: 6 Cylinders in Line, 4 Stroke Diesel
Displacement: 5.9 L
Bore * Stroke: 102 * 120
Net Weight: 411 Kg
Overall Dimension: 1110mm*750mm*988mm
Key Performance Data
Rated Power/Standby Power(1500 rpm): 120 kW/161 HP, 130 kW/174 HP
Rated Power/Standby Power(1800 rpm): 132 kW/177 HP, 145 kW/194 HP
Rated Speed: 1500/1800 rpm
Low Idle Speed: 950-1050 rpm
Fuel Consumption @ Running: ≤ 244 g/kW.hr
Torque @Rated/Standby Power: 764/828 N.m @ 1500 rpm
More Technical Data
Aspiration: Turbocharged/Charge Air Cooled
Fuel System: BYC PB Pump/GAC Governor
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
Governor Type: Electronic, Regulation 1%-5%
Compression Ratio: 17.5:1
Fuel Consumption Rate at 100% Load
Fuel economy dictates the return on investment for industrial diesel generator power engines. The Cummins 120kW engine fuel consumption rate at 100% load rests at approximately 34 liters per hour when running a 1500RPM diesel engine setup. Dropping the load to 75% optimizes efficiency to about 25.4 liters per hour. These numbers reflect optimal calibration via the integrated BYC PB fuel injection pump.
Advanced Cooling System & Turbocharger Architecture
The "AA" in 6BTAA stands for Turbocharged Aftercooled technology. The 6BTAA5.9-G2 turbo air-to-air cooling system diagram maps out how charge air enters the cylinders at vastly reduced temperatures, maximizing oxygen density for complete combustion. This setup allows the engine to achieve peak Cummins 6BTAA5.9-G2 torque output of 590 Nm at 1500RPM. This ensures steady, uncompromised performance even during high ambient temperature spikes in tropical mining environments or closed manufacturing plants.
Alternator Compatibility & Electronic Governor Setup
If you are an OEM builder assembling power units, understanding the 6BTAA5.9-G2 engine compatibility with Stamford alternator systems is critical. This engine utilizes a standard SAE3 flywheel housing and an 11.5-inch flywheel connection, which makes it seamlessly compatible with the Stamford UCI274E alternator or equivalent Marathon and Leroy Somer models.
Furthermore, while the base engine uses a reliable mechanical pump, HekoPower provides an optional Cummins 6BTAA5.9-G2 electronic governor setup. This electronic control upgrade reduces steady-state speed droop from 5% down to under 1%, meeting stringent ISO8528 G3 power quality standards for sensitive electronics.
Real-World Application Scenarios for the 120kW Cummins Engine
A product page should solve real problems. The 120kW Cummins diesel engine is engineered for specific emergency standby and continuous power grids. It is rarely used as a general motor; its design targets the critical infrastructure listed below.
Hospital Backup Power & Data Center Security
In medical facilities, a power outage is a matter of life and death. A Cummins generator engine for hospital backup power must crank and accept full load within 10 seconds of a main grid failure. The 6BTAA5.9-G2 offers the fast transient response required to run life-support machines without dangerous voltage drops. Similarly, a Cummins generator engine for data center installations keeps server racks online during grid drops, preventing catastrophic data corruption before long-term backup systems engage.
Remote Construction Sites & Rental Generator Fleets
Industrial jobsites operate far from public power infrastructure. Utilizing a Cummins engine for construction site generator systems means you get a power source that tolerates dusty environments and varying fuel qualities. Rental firms favor this specific 5.9L engine model for their rental generator fleet because parts are globally available. Mechanics worldwide understand how to fix a mechanical B-series engine without needing specialized computer diagnostics.
Telecom Towers & Emergency Power Stations
Telecom networks depend on continuous uptime. A Cummins engine for telecom generator systems handles remote, unmanned operations reliably, turning on automatically when solar or battery systems deplete. For local municipalities, setting up a Cummins engine for emergency power station arrays ensures that water pumping stations and emergency shelters stay fully functional during severe weather events or regional grid collapses.
Maintenance Guide & Genuine Spare Parts Support
To maximize the lifespan of your original Cummins generator engine, following a strict preventative service manual protocol is mandatory. Overlooking simple filtration changes will inevitably lead to premature engine failure.
Routine Maintenance and Overhaul Kit Timelines
Every 250 operational hours, the engine oil, fuel filters, and water separator must be replaced. If operating in dusty mining or construction environments, the air intake filter requires monthly inspection. For fleet operators managing high-hour assets, HekoPower supplies the complete Cummins 6BTAA5.9-G2 overhaul kit. This includes everything needed for mid-life engine restoration: main bearings, pistons, pins, and a full upper and lower gasket set.
Identifying Crucial Components for Part Replacement
When components inevitably wear down after years of continuous service, using cheap aftermarket parts risks destroying the engine block. HekoPower is a direct Cummins 6BTAA5.9-G2 spare parts wholesale supplier. We supply original components globally, including:
- Cummins 6BTAA5.9-G2 Fuel Pump Replacement: Genuine BYC or Bosch mechanical pumps calibrated to precise factory timing.
- Cummins 6BTAA5.9-G2 Turbocharger Replacement: Holset exhaust-driven turbochargers designed to withstand extreme thermal stress.
- Cummins 6BTAA5.9-G2 Water Pump Replacement: High-flow cooling pumps to eliminate engine overheating vulnerabilities.
- Cummins 6BTAA5.9-G2 Cylinder Head Assembly: Complete pre-assembled heads including valves, springs, and guides for quick installation.
Commercial Procurement Options & Factory-Direct Pricing
HekoPower is a leading Cummins generator engine manufacturer partner and global exporter. We eliminate middleman markups by sourcing your complete powertrain assets directly from the production floor.
Cummins 6BTAA5.9-G2 Wholesale Supplier Options
We offer tiered commercial discounts for regional generator assemblers, shipyards, and corporate repair fleets. Whether purchasing a single unit for an emergency breakdown replacement or buying container loads for factory integration, our logistics network provides seamless customs clearance and door-to-port shipping rates. Contact our technical sales desk today to request an official quote for a genuine DCEC Cummins 6BTAA5.9-G2 price proposal tailored to your destination port.
Cummins B5.9-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 6BT5.9-G1-86kw, 6BT5.9-G2-86kw, 6BTA5.9-G2-106kw, 6BTAA5.9-G2-120kw, 6BTAA5.9-G12-140kw.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
What is the exact difference between a standard 6BTA5.9 and the 6BTAA5.9-G2?
The primary difference lies in the cooling configuration. The standard 6BTA utilizes a turbocharger with water-to-air cooling (jacket water intercooled), whereas the 6BTAA5.9-G2 features a more efficient air-to-air aftercooling system. The "G2" designation means it is factory-configured specifically as a G-Drive engine optimized for electrical generator applications running at fixed synchronous speeds.
Can I run this engine at 1800RPM for 60Hz power generation markets?
Yes. While the engine is highly optimized as a 6BTAA5.9-G2 1500RPM diesel engine producing 120kW prime power for 50Hz grids, it can be adjusted to run at 1800RPM for 60Hz regions. At 1800RPM, the standby output capacity increases to approximately 132kW, making it highly versatile for North American and select South American power markets.
What is the standard Cummins 6BTAA5.9-G2 lead time and shipping weight?
HekoPower maintains regular factory stock of complete engine assemblies. Our typical order processing and testing lead time takes 7 to 10 business days before dispatching to the port. The physical engine dry weight is 411 kg, but when secured in our reinforced sea freight wooden crates, the final shipping weight is approximately 480 kg.
How do I verify that I am buying an original DCEC Cummins 6BTAA5.9-G2 engine?
Every genuine engine assembly shipped from the HekoPower warehouse features a prominent metal data plate stamped by Dongfeng Cummins Engine Co. This plate includes a unique 8-digit engine serial number (ESN). You can verify this number through the official Cummins global service system to confirm manufacture date, factory configuration, and warranty eligibility.
