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DCEC Cummins 6BT5.9-C120 Complete Engine Power Pack
The Cummins 6BT5.9-C120 diesel engine remains a global workhorse for industrial, construction, and agricultural machinery. Manufactured by Dongfeng Cummins Engine Co. (DCEC), this 6-cylinder, 5.9-liter mechanical power unit delivers a reliable 120 HP (87 kW) at 2200 RPM.
Unlike basic parts suppliers who only provide bare blocks, HekoPower specializes in delivering the complete Dongfeng Cummins 6BT5.9 engine assembly. We configure our builds from fan to flywheel, ensuring your team receives a ready-to-install drop-in solution that minimizes operational downtime.
Tech Specs of Cummins 6BT5.9-C120
General Engine Data
Engine Model: Cummins 6BT5.9-C120
Type: 6 Cylinders in Line
Displacement: 5.9 L
Bore * Stroke: 102 * 120
Overall Dimension: 867mm*544mm*988mm
Net Weight (with flywheel & alternator): 432 Kg
Key Performance Data
Rated Power: 87 kW/120HP
Rated Speed: 2200 rpm
Max Torque/Speed: 436 N.m @ 1500 rpm
Fuel Consumption @ Rated Power: 225 g/Kw.h
Max Continuous Running Altitude: 2000 m
More Technical Data
Certification: Euro I
Aspiration: Turbocharged-Intercooled
Fuel System: Wuxi Weifu 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
Cummins 6BT5.9 Engine Horsepower and Torque Metrics
At its rated speed of 2200 RPM, the C120 variant produces a steady 87 kW (120 HP). The true value of this industrial engine lies in its torque backup. It generates peak torque of roughly 410 to 430 Nm at 1500 RPM. This wide torque band allows heavy construction machinery to recover quickly under sudden, heavy structural loads without stalling.
Difference Between Cummins 6BT5.9 C100, C120, and C130
Engine buyers frequently confuse different power ratings within the DCEC 6BT platform. The core differences trace directly to the fuel pump calibration and turbocharger matching:
- 6BT5.9-C100: Rated at 100 HP (74 kW). Calibrated for lighter duty cycles like small forklifts or compact agricultural tractors.
- 6BT5.9-C120: Rated at 120 HP (87 kW). Optimized for mid-tier hydraulic demands, balancing fuel economy with continuous output.
- 6BT5.9-C130: Rated at 130 HP (97 kW). Configured with a higher fuel delivery rate for demanding applications like high-pressure water pumps or heavy-duty drilling rigs.
Real Application Scenarios for the 6BT5.9-C120
The Cummins industrial engine 6-cylinder 5.9L is versatile. HekoPower modifies the external auxiliary components depending on your specific machine layout.
Cummins 6BT5.9-C120 Engine Replacement for Excavators
Mid-sized crawler excavators demand immediate hydraulic response. The 120 HP Cummins construction engine integrates seamlessly with mainstream hydraulic pump systems, such as Kawasaki or Uchida series pumps. The mechanical governor reacts instantly to the load changes felt by the main control valves. This ensures smooth boom and bucket operation during deep trenching work.
DCEC 6BT5.9-C120 Diesel Engine for Rotary Drilling Rigs
Rotary drilling rigs operate in high-vibration, high-dust environments. The 6BT5.9-C120 mechanical engine for engineering machinery excels here due to its simplified cast-iron cylinder block and head. HekoPower equips these specific rigs with a heavy-duty 4-cycle 6BT5.9-C120 industrial power unit configuration. This includes specialized structural engine mounts designed to damp harmonic vibrations.
Industrial Pump Power Engine 6BT5.9 Configuration
For continuous-duty applications like flood control, mining dewatering, or agricultural irrigation, the engine runs for hours at fixed RPMs. We supply this model as a Cummins 6BT5.9 generator set engine or high-volume water pump driver. It is built with an oversized cooling system to handle uninterrupted thermal loads.
Maintenance, Troubleshooting, and Engine Replacement Tips
To maximize the lifespan of your 6BT5.9 diesel engine for sale, operational teams must follow precise preventative maintenance rules.
Selecting the Best Replacement Engine for Cummins 6BT5.9-C120
When replacing an old unit, matching the model number is not enough. You must inspect the configuration of your oil pan, the position of the turbocharger (top-mount vs. side-mount), and the flywheel housing size (typically SAE #2 or SAE #3). HekoPower assists buyers by auditing these physical dimensions before shipping to guarantee a perfect drop-in fit.
Crucial Fuel System Maintenance
Because the C120 uses a mechanical injection pump, fuel cleanliness is critical. Water contamination is the primary cause of pump failure. Install a high-efficiency water separator before the primary fuel filter. Flush the sediment bowl every 50 hours of operation.
Managing Thermal Loads in Construction Environments
Excavators and drilling rigs often fail due to localized overheating. Ensure the cooling fan belts maintain proper tension. Clean the radiator fins weekly in high-dust agricultural or desert environments to prevent scaling and airflow blockages.
Procurement, Customization, and Logistics
As an established global engine supplier, HekoPower removes the friction from international B2B machinery procurement.
Complete Engine Build Configurations
We do not just ship a bare block. Your order can be customized as a full Cummins 6BT5.9-C120 engine with radiator and air filter pack. This complete structural kit includes:
- Brand new DCEC 6BT5.9-C120 base engine.
- Mounted industrial radiator and cooling fan.
- Heavy-duty air cleaner assembly.
- 24V starter motor and charging alternator.
- Instrument control panel with oil pressure and temperature gauges.
Testing, Inspection, and Quality Assurance
Every single Genuine Cummins 6BT5.9-C120 Industrial Engine Assembly undergoes a mandatory 2-hour dynamometer test before crating. Our engineers monitor oil pressure curves, thermal stabilization, and fuel consumption rates under simulated load. We provide the certified testing data sheet with your shipping documentation.
Shipping Dimensions and Global Logistics
- Original 6BT5.9-C120 engine lead time: Standard configurations ship within 7 to 15 business days.
- Shipping weight: Approx 430 kg (dry weight); approx 510 kg crated.
- Packaging: Heavy-duty, IPPC-certified wooden sea-freight cases to prevent corrosion during transit.
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 regarding the 6BT5.9-C120
What is Cummins 6BT5.9-C120 used for?
It is primarily used as a prime power source for construction machinery, agricultural equipment diesel engine Cummins 6BT5.9 builds, industrial fluid pumps, and small commercial generator sets.
How do I verify if the engine is a genuine DCEC Cummins unit?
Every genuine engine features a metal data plate stamped by Dongfeng Cummins Engine Co., Ltd. This plate includes a unique 8-digit Engine Serial Number (ESN). HekoPower provides this ESN prior to dispatch so you can verify the factory build history through the official Cummins network.
What is the wholesale price of a Cummins 6BT5.9-C120 from China?
Pricing varies depending on the specific auxiliary components required, such as radiators, clutches, or customized flywheels. Contact the HekoPower sales team directly to receive an itemized Cummins 6BT5.9 engine wholesale price China supplier quote based on your fleet order volume.
What warranty coverage is included with the engine?
Every engine is backed by a standard 12-month international warranty covering structural components, including the cylinder block, crankshaft, and camshaft. We also offer extended parts support packages for remote mining and construction operations.
