Details
Dongfeng Cummins C300-33 Vehicle Diesel Engine
The Cummins C300-33 engine is an 8.3-liter, inline six-cylinder mechanical diesel power plant engineered strictly for heavy-duty commercial vehicles. Generating a rated power of 221kW (300HP) at 2200 RPM, it is a workhorse for regional freight and logistics. HekoPower operates as a primary Cummins C300-33 engine supplier, providing factory-fresh complete engine assemblies to international markets.
Fleet managers and repair facilities buy the Cummins C300-33 engine to repower aging chassis reliably. This specific model features a robust cast-iron block, wet replaceable cylinder liners, and a mechanical fuel system. These traits make the Cummins C300-33 diesel engine incredibly easy to maintain in regions lacking advanced computer diagnostic infrastructure.
Tech Specs of Cummins C300-33
General Engine Data
Engine Model: Cummins C300-33
Type: 6 Cylinders in Line
Displacement: 8.3 L
Bore * Stroke: 114 * 135
Net Weight (with flywheel & alternator): 636 Kg
Overall Dimension: 1180mm*920mm*1280
Key Performance Data
Rated Power: 221 kW/300 HP
Rated Speed: 2200 rpm
Max Torque/Speed: 1125 N.m @ 1200 rpm
Fuel Consumption @ Rated Power: 229 g/Kw.h
Max. No-load Governed Speed: 2500 rpm
Idle-Speed: 750±100 rpm
Max Continuous Running Altitude: 2000 m
More Technical Data
Certification: Euro II
Aspiration: Turbocharged & Air-Air Intercooled
Fuel System: BOSCH P7100 Pump
Compression Radio: 17.5:1
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: 12.3 L
Technical Comparisons Within the Cummins 8.3L Family
Buyers often confuse the C300-33 with other engines in the C-Series lineup. While the external block dimensions appear identical across several models, the internal calibration and operational intent vary drastically.
Cummins C300-33 vs C280-33 and C260-33
The Cummins C300-33 vs C280-33 debate usually centers on pulling power. All three engines utilize the exact same 8.3L displacement, 114mm bore, and 135mm stroke. The difference lies in air and fuel delivery. The Cummins C300 33 assembly 300HP variant uses a higher-capacity Holset turbocharger. It also features larger plungers inside the fuel injection pump. This pushes the Cummins C300-33 torque curve up to a peak of 1125Nm. The C260-33 and C280-33 models cap out at significantly lower torque thresholds, making them better suited for lighter rigid trucks rather than heavy tractor heads.
Cummins C300-33 vs C300-20
Upgrading an older fleet often brings up the Cummins C300-33 vs C300-20 comparison. The C300-20 represents the older Euro 2 emissions standard. The Cummins C300 33 Euro 2 Euro 3 diesel engine specs shift primarily at the fuel delivery level. To meet Euro 3 requirements, the C300-33 incorporates refined injector spray angles and tighter mechanical governor controls. The physical mounting points remain the same, making the C300-33 an excellent direct replacement engine.
C300-33 vs 6CTA8.3-C300
Never install an industrial engine into a road-going truck. The C300-33 is a dedicated commercial vehicle engine. The 6CTA8.3-C300 is built for construction equipment. The vehicle-spec C300-33 uses an automotive variable-speed governor that reacts smoothly to throttle pedal inputs. The industrial engine uses an all-speed governor designed to hold a steady RPM under sudden hydraulic loads. Swapping them causes severe drivability issues on the highway.
Cummins 300HP 8.3L vs 8.9L Engine
When looking at heavy duty truck options, buyers weigh the 8.3L against the newer 8.9L ISLe series. The 8.9L Cummins utilizes an electronic common-rail fuel system. The DCEC C300-33 relies entirely on a mechanical Bosch P7100 pump. Operators hauling freight in remote areas vastly prefer the mechanical C300-33. It resists damage from poor fuel quality and requires zero electronic troubleshooting.
Real Application Scenarios and Drivetrain Matching
A replacement engine only performs well if matched correctly to the vehicle's driveline. The Cummins C300-33 engine for Dongfeng truck applications requires precise gearbox pairing to maximize fuel economy.
Dongfeng Tractor Head Engine Replacement
The Cummins C300-33 truck engine serves as the factory power plant for numerous Dongfeng 4x2 and 6x4 tractor heads. Its power density makes it perfect for local port drayage and regional material transport. When executing a Dongfeng tractor head C300 33 engine replacement, mechanics must verify the C300-33 flywheel housing size. It typically ships with an SAE 1 or SAE 2 housing to accommodate heavy-duty commercial clutches.
Gearbox and Transmission Compatibility
Achieving optimal Cummins C300-33 fuel consumption requires keeping the engine in its peak torque band of 1200 to 1400 RPM. We highly recommend pairing the Cummins C300-33 engine with the Fast 9JS119T-B gearbox. This 9-speed manual transmission handles the 1125Nm torque output perfectly. The gear splits align with the mechanical governor's fuel delivery curve, preventing the engine from bogging down on steep inclines.
Engine Maintenance and Component Replacement Tips
Maintaining the DCEC Cummins C300-33 heavy duty truck engine is straightforward due to its mechanical nature. Strict adherence to fluid schedules prevents catastrophic failures.
C300-33 Fuel Pump Maintenance
The heart of this engine is the Cummins C300-33 Bosch P7100 fuel injection pump. This component is incredibly durable but highly sensitive to water contamination. Operators must drain the primary fuel water separator daily. If you experience hard starting or black smoke, the issue usually traces back to fuel pump timing rather than internal engine wear. Always reference the DCEC C300-33 genuine engine spare parts catalog before attempting pump calibration.
Turbocharger and Cooling System Maintenance
This is a high-output turbocharged intercooled engine. The Holset turbocharger spins at extreme speeds. Operators must idle the engine for three minutes before shutdown. This allows the oil to cool the turbocharger bearings. Shutting the truck down hot will cook the oil inside the bearing housing. Furthermore, C300-33 cooling system maintenance requires regular checks of the charge air cooler. A cracked intercooler pipe creates a massive boost leak, drastically reducing power and increasing exhaust temperatures.
Common Misconceptions About the C300-33
Many fleet owners harbor misunderstandings about mechanical truck engines. Clarifying these points saves time during the engine replacement process.
First, buyers often ask for the engine control unit (ECU) when ordering a C300-33 engine assembly. The Cummins C300-33 does not have an ECU. It is a fully mechanical system. Throttle input is controlled via a steel cable linked directly to the fuel pump.
Second, mechanics sometimes attempt to increase the 221kW Cummins truck engine horsepower by adjusting the fuel pump stop screw. This is a severe mistake. Over-fueling a C300-33 without upgrading the turbocharger air delivery will melt the pistons due to excessive exhaust gas temperatures. Always operate the engine at its factory 300HP setting.
Expanding Your Commercial Fleet Power Options
As a comprehensive Cummins engine manufacturer partner and exporter, HekoPower understands that different routes require different power nodes. While the 300HP model is ideal for heavy tractor heads, lighter rigid trucks may require a different torque profile from the same engine family.
DCEC 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 C220-20, C230-20, C230-33, C240-20, C245-20, C245-33, C260-20, C260-33, C280-20, C280-33, C300-20, C300-33, C325-20.
Frequently Asked Questions
What are the exact Cummins C300-33 engine dimensions and weight?
The engine maintains a compact footprint suitable for tight cab-over-engine truck designs. The dry Cummins C300-33 engine weight is approximately 636 kilograms. Always account for an additional 40 kilograms when factoring in lubricating oil and cooling system fluids.
What is the factory Cummins C300-33 compression ratio?
This mechanical diesel engine operates with a compression ratio of 17.3:1. This relatively high compression ratio ensures reliable cold weather starting and highly efficient mechanical combustion inside the cylinders.
How do I identify a genuine Cummins C300-33 engine?
Every original DCEC engine features a stamped metal data plate affixed to the timing gear housing. This plate clearly displays the engine model, rated power 2200 RPM, the C300-33 torque specification, and the unique Engine Serial Number (ESN). You can verify this ESN directly through Cummins service channels.
Where can I get the Cummins C300-33 engine wholesale price?
HekoPower serves as a direct exporter for DCEC products. You can buy original new DCEC Cummins C300-33 engines at competitive wholesale price points directly through our sales team. Contact us with your required quantities and destination port for an accurate freight and product quote.
