Details
DCEC Cummins 4BT3.9-C110 Industrial Diesel Engine Assembly
The DCEC Cummins 4BT3.9-C110 is a heavy-duty, 4-cylinder in-line diesel engine engineered specifically for demanding construction and industrial machinery. Delivering 80kW (110 horsepower) at 2,600 RPM, this 3.9-liter turbocharged engine combines mechanical reliability with high power density. Built by Dongfeng Cummins Engine Co., Ltd. (DCEC), the 4BT3.9-C110 features a robust mechanical fuel injection system, making it an ideal choice for contractors and fleet operators requiring low maintenance downtime and high resistance to varying fuel quality.
As a global supplier of complete engine assemblies and replacement power units, HekoPower provides fully tested 4BT3.9-C110 engines configured for immediate installation into construction equipment, agricultural rigs, and industrial power packs.
Tech Specs of Cummins 4BT3.9-C110
General Engine Data
Engine Model: Cummins 4BT3.9-C110
Type: 4 Cylinders in Line
Displacement: 3.9 L
Bore * Stroke: 102 * 120
Overall Dimension: 867mm*544mm*988mm
Net Weight (with flywheel & alternator): 338 Kg
Key Performance Data
Rated Power: 80 kW/110HP
Rated Speed: 2600 rpm
Max Torque/Speed: 350 N.m @ 1500 rpm
Fuel Consumption @ Rated Power: 258g/Kw.h
Max Continuous Running Altitude: 2000 m
More Technical Data
Certification: Euro I
Aspiration: Turbocharged-Intercooled
Fuel System: Weifu PW/RSV
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: 7.9 L
Real-World Applications and Machinery Compatibility
The 4BT3.9-C110 engine profile caters to equipment requiring sustained hydraulic output and high torque under continuous duty cycles. Its compact four-cylinder envelope fits seamlessly into narrow engine compartments without requiring bulky intercooler ducting.
Construction and Earthmoving Machinery
In earthmoving applications, the engine powers 10-ton to 12-ton hydraulic excavators, compact wheel loaders (such as Liugong, XCMG, and SANY models), and medium-duty road rollers. The 2,600 RPM speed rating ensures rapid hydraulic pump response, enabling fast cycle times during digging and loading operations.
Specialized Drilling and Utility Rigs
Drilling contractors utilize the 4BT3.9-C110 to power water well drilling rigs and rotary piling machines. Its mechanical governor maintains stable power output when encountering changing soil densities, preventing engine stalling during heavy torque load shifts.
Stationary and Mobile Auxiliary Units
Outside mobile equipment, this 3.9L engine drives high-capacity water pumps, hydraulic power units (HPUs), concrete mixers, and mobile air compressor stations operating in challenging outdoor environments.
Technical Model Comparisons: Understanding the 4BT3.9-C110 Advantage
Choosing the correct B-series engine requires understanding key differences between turbocharging levels, cooling systems, and power ratings. The 4BT3.9-C110 occupies a unique position in Cummins' 3.9-liter family.
4BT3.9-C110 vs. 4BTA3.9-C110 (Non-Aftercooled vs. Aftercooled)
While both models generate 110 horsepower, the fundamental difference lies in air intake management. The 4BT3.9-C110 relies solely on a turbocharger without a Charge Air Cooler (CAC). The 4BTA3.9-C110 utilizes an aftercooler to cool intake air.
Selecting the 4BT3.9-C110 eliminates the need for an external intercooler radiator and associated air piping. This simplified design reduces installation complexity, saves physical space in tight engine bays, and eliminates potential boost leaks caused by cracked charge air hoses.
4BT3.9-C110 vs. 4BTAA3.9-C110 (Air-to-Air Aftercooling)
The 4BTAA variant incorporates air-to-air aftercooling technology designed for stricter emission thresholds. However, for regions operating under Tier 2 emission standards, the non-aftercooled 4BT3.9-C110 offers a far more straightforward mechanical arrangement. Equipment operators benefit from reduced maintenance points, as there is no intercooler matrix to clean or clear of job-site debris.
Power Calibration Differences: C100, C105, and C110
Within the naturally aspirated and turbocharged 4BT lineup, the C100 (100HP), C105 (105HP), and C110 (110HP) share the same 102mm bore and 120mm stroke cylinder block. The higher 80kW output of the C110 is achieved through precise fuel injection pump calibration and altered governor springs. This allows higher fuel delivery rates at peak operating speeds without exceeding safe thermal parameters.
Maintenance, Installation, and Repower Protocols
Installing a replacement engine or repowering existing machinery requires careful attention to interface specifications. HekoPower supplies complete 4BT3.9-C110 assemblies configured to drop directly into standard industrial setups.
Checking Flywheel Housing and Starter Alignment
Before mounting the engine, confirm the flywheel housing pattern (typically SAE #3 or SAE #2) matches your hydraulic pump transmission adapter or gearbox. Verify starter motor voltage (12V or 24V) and ring gear tooth count to prevent engagement wear during startup.
Fuel System Priming and Governor Adjustment
The 4BT3.9-C110 employs a reliable Weifu A-type mechanical fuel injection pump fitted with an RSV all-speed governor. When installing a replacement unit or changing fuel filters, manually prime the low-pressure fuel system using the hand primer lever on the lift pump to expel trapped air. Ensure the throttle linkage allows full stroke movement on the RSV governor arm to achieve the full 2,600 RPM rating under load.
Cooling and Oil Capacity Requirements
Although non-aftercooled, the engine requires a cooling system capable of shedding heat under maximum load. Ensure the radiator core matches the original heat rejection specifications. Always fill the oil pan with high-grade 15W-40 diesel engine oil, ensuring the initial fill accounts for the full-flow oil filter capacity (~11 liters total system capacity).
Common Technical Misconceptions
Misconception 1: "Higher horsepower always requires an intercooler."
Many equipment owners assume reaching 110HP on a 3.9L Cummins engine requires a 4BTA configuration with an intercooler. In reality, the 4BT3.9-C110 achieves 80kW through precise turbocharger matching and fuel calibration alone. This provides 110HP performance without adding intercooler radiators to your cooling package.
Misconception 2: "All 4BT3.9 engines use identical mounting points."
While basic block castings remain consistent across the B-series family, specific CPL (Control Parts List) numbers dictate oil pan sump locations (front, rear, or center drop), flywheel housings, and exhaust manifold angles. Always provide your existing engine CPL or serial number when ordering to ensure seamless fitment.
B3.9-C Engine Series Overview
To assist equipment operators in selecting the exact power output required for their machinery, This series mainly includes 4BT3.9-C80, 4BT3.9-C100, 4BT3.9-C105, 4BT3.9-C110, 4BTA3.9-C80, 4BTA3.9-C100, 4BTA3.9-C110, 4BTA3.9-C120, 4BTA3.9-C125, 4BTA3.9-C130, 4BTAA3.9-C80, 4BTAA3.9-C100, 4BTAA3.9-C110, 4BTAA3.9-C115, 4BTAA3.9-C125, 4BTAA3.9-C130.
Cummins 4BT3.9-C110 Procurement and Supply FAQ
What machinery directly accepts the DCEC Cummins 4BT3.9-C110?
This engine model commonly powers 10-12 ton hydraulic excavators, 3-ton wheel loaders, rotary drill rigs, vibration road rollers, and stationary industrial pump sets.
How does the RSV mechanical governor benefit construction applications?
The RSV mechanical governor automatically adjusts fuel delivery when engine load increases, maintaining stable engine speed without electronic sensors or ECU controls. This ensures smooth hydraulic control during heavy lifting or digging.
Can I replace an older Tier 1 or non-emission 4BT engine with the 4BT3.9-C110?
Yes. The 4BT3.9-C110 serves as an excellent mechanical repower engine for older equipment. Because it relies on mechanical fuel injection rather than electronics, wiring modifications are minimal—requiring only standard battery, starter, alternator, and fuel shutoff solenoid connections.
What is the standard packaging and shipping lead time for export orders?
HekoPower packs each complete engine assembly in a sealed, ocean-ready timber box. Production, testing, and export preparation typically take around 10 business days before dispatch to port.
