Details
Genuine Cummins L340-20 Vehicle Engine Assembly for Heavy Duty Fleets
The Cummins L340-20 is one of the most widely used heavy-duty vehicle engines produced by Dongfeng Cummins Engine Co., Ltd. Designed for commercial transportation, engineering vehicles and industrial power applications, this 8.9L inline six-cylinder diesel engine combines dependable mechanical fuel injection with a robust cast-iron structure that has proven reliable in demanding operating environments.
Unlike many modern electronically controlled engines, the L340-20 uses a Bosch P7100 mechanical fuel injection pump. This configuration is appreciated by fleet operators working in regions where fuel quality varies or advanced diagnostic equipment is not readily available. The mechanical fuel system is straightforward to service and contributes to lower maintenance costs over the engine's operating life.
At HekoPower, we supply complete genuine Cummins engine assemblies rather than rebuilt units. Each engine is inspected before shipment, protected with export-grade packaging and supplied with documentation appropriate for international delivery.
Tech Specs of Cummins L340-20
General Engine Data
Engine Model: Cummins L340-20
Type: 6 Cylinders in Line
Displacement: 8.9 L
Bore * Stroke: 114 * 145
Net Weight (with flywheel & alternator): 650 Kg
Overall Dimension: 1149mm*799mm*1022mm
Key Performance Data
Rated Power: 250 kW/340 HP
Rated Speed: 2200 rpm
Max. Torque/Speed: 1350 N.m @ 1400 rpm
Max. No-load Governed Speed: 2500 rpm
Idle-Speed: 700±100 rpm
Max Continuous Running Altitude: 2000 m
Fuel Consumption @ Rated Power: 230 g/Kw.h
More Technical Data
Certification: Euro II
Aspiration: Turbocharged & Air-Air Intercooled
Fuel System: BOSCH P7100 Pump/RVQ-K Governor
Compression Radio 16.6:1
Electrical System (Starter Motor/Alternator): 12V(500A)/24V (250A)
Lowest Starting Temp Without auxiliary system: -10℃/-25℃
Cooling Method: Water cooled
Engine Cooling Fluid Volume: 11.1 L
Technical Comparisons: Understanding the 8.9L L-Series Platform
To eliminate the common product homogeneity seen across online engine catalogs, buyers must look at the specific calibration differences within the Cummins 8.9L L-series lineup. The L340-20 is specifically engineered to balance fuel economy with low-end pulling power, making it distinct from lower-rated options like the L325-20 or higher-stressed variants like the L360-20.
Precision Engineering and Power Ratings
The Cummins L340-20 diesel engine delivers an advertised power output of 340 HP (equivalent to 250 kW) at a rated speed of 2200 RPM. It achieves a peak torque rating of 1350 N.m at 1400 RPM. This specific torque curve allows commercial vehicles to move heavy loads from a complete stop without excessive clutch wear or transmission strain. The engine features a 6-cylinder in-line configuration with a cylinder bore of 114 mm and a piston stroke of 145 mm. With a compression ratio of 16.6:1, the thermal efficiency remains high while controlling raw thermal emissions within its mechanical parameters.
Fuel System and Emission Standards
A defining technical feature of the Cummins Euro II engine configuration is its reliance on the highly dependable Bosch P7100 mechanical injection pump paired with an RQV-K governor. Unlike newer common-rail electronic systems that require ultra-low sulfur diesel and sensitive electronic control units, the Bosch P7100 pump settings on the L340-20 offer exceptional tolerance to varying fuel qualities. This setup makes the engine highly sought after in export markets where electronic diagnostic tools are limited. The 24-valve cylinder head optimizes airflow over the center-arranged injectors, creating a symmetrical combustion pattern that improves fuel atomization and lowers smoke opacity to comply cleanly with Euro 2 emission parameters.
Real-World Fleet and Machinery Application Scenarios
The operational versatility of the Dongfeng Cummins L340-20 vehicle engine allows it to function effectively across distinct heavy transport and industrial sectors. Understanding these applications helps fleet maintenance managers match the exact motor to their vehicle requirements.
Dongfeng Heavy Trucks and Mining Tippers
The primary application for the Cummins L340-20 truck engine is within the heavy-duty commercial truck sector. It serves as the standard replacement powerplant for Dongfeng 6x4 and 8x4 tipper trucks, dump trucks, and heavy cargo haulers operating in mining and regional distribution networks. The mechanical low-end torque allows these heavy trucks to climb steep gradients in off-road mining environments while carrying payloads exceeding thirty tons.
Commercial Passenger Buses and Coaches
For regional transit and long-distance travel, the 8.9L vehicle power pack operates inside 12-meter commercial passenger buses, such as various Foton and Dongfeng coach chassis models. In passenger applications, the engine configuration delivers smooth power transmission with reduced noise levels, measured around 94 dB(A). The steady torque delivery ensures a stable ride for passengers while keeping average fuel consumption predictable during long-distance highway cruising.
Industrial Power Units and Equipment Repowering
Beyond standard commercial vehicles, the engine serves as an effective construction equipment engine and industrial power unit. It provides the necessary rotational force for heavy mobile cranes, large air compressors, and specialized material handling machinery. For companies undertaking fleet refurbishment programs, using this engine as a replacement unit revitalizes older machinery with a predictable, easily maintained mechanical powertrain.
Maintenance, Tuning, and Overhaul Guide
Preserving the long-term operational health of your investment requires adhering to strict maintenance protocols and using genuine components during service intervals. The design life-to-overhaul for the L340-20 platform can exceed 800,000 kilometers when maintained properly.
Mechanical Fuel System Calibration
The heart of the engine's durability is the Bosch P7100 fuel pump. Periodic inspection of the pump settings ensures fuel consumption remains close to the factory minimum rating of 215 g/kW.h. Maintenance teams must ensure that the mechanical linkages running to the RQV-K governor remain free of debris and are well-lubricated. Incorrect injection timing or improper governor adjustments can lead to excessive exhaust gas temperatures, increased fuel consumption, and premature wear on the internal components.
Routine Filtration and Component Care
Using OEM Cummins L340-20 engine parts during routine servicing prevents contaminants from reaching critical internal surfaces. The oil filter and water pump must be checked at scheduled hours or distance intervals to maintain stable cooling fluid volume, which sits at 11.1 liters for the core engine block. Because this engine relies on a high-efficiency turbocharger and an air-to-air intercooler system to sustain its 340 HP output, checking the integrity of the air intake piping and replacing the air filters regularly prevents compressor wheel erosion.
Overhaul and Component Replacement
When the engine eventually reaches its major service limit, technicians can restore factory clearances using a dedicated Cummins L340-20 overhaul kit. This comprehensive kit includes articulated pistons with forced cooling channels, enhanced cylinder liners, and high-performance rings designed to handle heavy mechanical loads. When replacing individual high-wear parts like a fuel injector or turbocharger, using original parts preserves the exact 1350 N.m torque profile and prevents imbalances between cylinders.
Cummins L Series, original products from Dongfeng Cummins Engine Plant (DCEC), Cummins Joint Venture Plant since 1986, 50% shareholding by Cummins USA. This series mainly includes L270-30, L290-30, L300-20, L315-30, L325-20, L340-20, L360-20, L360-30, L375-20, L375-30.
Strategic Procurement and Logistics FAQ
What are the exact shipping dimensions and weight of the complete engine assembly?
The Cummins L340-20 complete engine assembly has a net dry weight of approximately 650 kg, increasing to a wet weight of roughly 680 kg once filled with oil. For international maritime or land freight logistics, the engine is securely crated. The standard packing dimensions measure approximately 1300 mm in length, 900 mm in width, and 1100 mm in height. The gross weight inside the protective shipping crate is roughly 720 kg.
What is the typical lead time for an original DCEC engine assembly from HekoPower?
As an experienced wholesale Cummins L340-20 engine distributor, HekoPower maintains consistent component pipelines. The typical manufacturing and quality testing lead time for a brand-new, factory-certified complete motor ranges between 15 and 30 working days. This timeframe guarantees that every engine undergoes dyno testing and rigorous inspection prior to export packing.
Can this Euro II engine replace an engine in a vehicle configured for Euro III?
Replacing a Euro III engine with a Euro II mechanical engine depends heavily on your local environmental regulations and vehicle wiring setup. The mechanical nature of the L340-20 makes it easier to fit into older chassis, but it lacks the electronic control networks required by vehicles designed specifically around Euro III or Euro IV electronic injection systems. Please consult with our engineering support team to review your specific chassis schematic before ordering.
What documentation is provided with the engine assembly package?
Every complete engine shipped by HekoPower includes a comprehensive technical package to assist your maintenance team. This package contains the original factory datasheet, the official Cummins L340-20 PDF maintenance manual, and an illustrated service guide. These documents provide the precise torque specifications for every bolt, exact timing marks for the fuel system, and part number breakdowns for future routine maintenance requirements.
