Details
Genuine XCEC Cummins QSM11-C400 Construction Diesel Engine
The Cummins QSM11-400 is an advanced 10.8L heavy-duty power pack engineered specifically for demanding off-highway applications. Built at the Xi'an Cummins Joint Venture Plant (XCEC), the QSM11-C400 construction diesel engine delivers a formidable 298kW (400HP) at 2100 RPM, backed by a massive 1898 Nm peak torque profile. Designed to meet stringent emissions standards including Tier 3 and EU Stage IIIA, this 6-cylinder powerplant utilizes advanced CELECT electronic unit injection technology. Whether you are repowering a high-tonnage excavator or upgrading a heavy wheel loader, the XCEC Cummins QSM11-400 power pack guarantees sustained mechanical output under extreme structural loads.
Tech Specs of Cummins QSM11-400
General Engine Data
Engine Model: Cummins QSM11-400
Type: 6 Cylinders in Line
Displacement: 10.8 L
Bore * Stroke: 125 * 147
Overall Dimension: 1306mm*914mm*1280mm
Net Weight (with flywheel & alternator): 984 Kg
Key Performance Data
Rated Power: 298 kW/400HP
Rated Speed: 2100/1800 rpm
Max Torque/Speed(2100 RPM): 1898 N.m @ 1400 rpm
Max. Torque/Speed (1800 RPM): 1898 N.m @ 1400 rpm
Fuel Consumption @ Rated Power: 217 g/Kw.h
More Technical Data
Certification: Tier III
Aspiration: Turbocharged & Charge Air Cooled
Fuel System: Common Rail High Pressure Injection
Compression Ratio: 16.3:1
Electrical System (Starter Motor/Alternator): 12V/24V
Lowest Starting Temp Without auxiliary system: -12℃/-25℃
Cooling Method: Water cooled
Engine Cooling Fluid Volume: 9.5 L
Control System: Full Electronic Control System(ECM)
Technical Comparisons in the Heavy Equipment Sector
When evaluating the 400HP Cummins industrial engine class, equipment operators frequently compare the QSM11-C400 against both its mechanical predecessor, the M11, and modern 9-liter alternatives like the QSL9. Unlike older mechanically governed M11 variants, the QSM11-C400 CELECT engine integrates a sophisticated Electronic Control Module (ECM). This transition from a traditional PT fuel system to fully electronic control allows the QSM11-400 10.8L diesel engine to dynamically adjust fuel delivery based on real-time load feedback, significantly reducing transient smoke and improving fuel economy during heavy digging cycles.
Compared to the 8.9L QSL9 series, the QSM11-C400 offers unmatched durability in continuous high-load scenarios. While the QSL series is lighter, the robust 125 × 147 mm bore and stroke of the QSM11-C400 provides a far superior torque reserve. The QSM11-C400 1898 Nm torque rating at lower RPMs ensures that high-tonnage machinery will not stall or lag when encountering sudden resistance, making this QSM11-C400 turbocharged engine the preferred choice for heavy-duty earthmoving rather than medium-duty utility work.
Real Application Scenarios for the QSM11-C400
The QSM11-C400 industrial diesel engine is not a generic multi-purpose motor; it is highly specialized for severe-duty off-highway environments. As a dedicated QSM11-C400 excavator engine, it is frequently installed in 35-ton to 50-ton heavy tracked excavators. In these machines, the QSM11-C400 charge air cooled engine manages extreme hydraulic pump demands during deep trenching or quarry face-loading. The electronic ECM communicates directly with the excavator’s hydraulic controller to prevent power loss during simultaneous booming and swinging actions.
Beyond excavators, this powerplant excels as a QSM11-C400 wheel loader engine and a QSM11-C400 mining equipment engine. Heavy wheel loaders operating in aggregates or forestry require aggressive breakout force, which relies heavily on the low-end torque provided by this 10.8L block. Additionally, the QSM11-C400 engine for drilling rigs and QSM11-C400 crane engine applications benefit from its stable power delivery. Rotary drilling rigs face sudden, extreme resistance when biting into bedrock, and the high torque reserve of the QSM11-C400 2100 RPM configuration prevents the drill string from stalling, protecting both the engine and the gearbox from shock loads. For remote operations, the QSM11-C400 oilfield engine variant provides reliable continuous duty power for mud pumps and well-servicing equipment.
Maintenance and QSM11-400 Engine Replacement Tips
Procuring a Cummins QSM11-C400 replacement engine requires careful attention to compatibility and integration. When planning a QSM11-C400 engine replacement, the first step is verifying the equipment’s existing ECM wiring harness. Because the QSM11-C400 electronic control engine communicates via standard CAN-bus protocols, a direct 400HP Cummins replacement engine will usually sync with your machinery's existing dashboard and throttle controls. However, you must confirm that your old engine was also Tier 3 compliant. Upgrading from a Tier 2 to a QSM11-C400 Tier 3 engine may require minor harness adaptations or ECM recalibrations.
From a preventative maintenance perspective, the QSM11-C400 6 cylinder engine is incredibly resilient, but it demands strict adherence to filtration standards. The QSM11-C400 common rail engine components operate under extreme pressures, making them highly sensitive to water and particulate contamination in diesel fuel. Operators must ensure that primary water separators are drained daily and that original OEM fuel filters are utilized. If you are sourcing a QSM11-C400 replacement power unit for a dusty mining environment, ensure your intake features a dual-stage cyclone air cleaner. Starving a QSM11-C400 1800 RPM industrial engine of clean air will rapidly degrade the turbocharger bearings and elevate internal operating temperatures.
Common Misconceptions Surrounding the QSM11 Series
A frequent misconception in the replacement market is the confusion between manufacturing origins, specifically regarding the genuine XCEC QSM11-C400 engine. Buyers often assume that all heavy-duty Cummins engines are produced at the CCEC (Chongqing) facility. While CCEC handles larger blocks like the KTA19 and NTA855, the authentic Cummins QSM11-400 construction engine is manufactured exclusively by the XCEC joint venture in Xi'an. Purchasing a genuine XCEC Cummins QSM11-400 guarantees adherence to original US Cummins metallurgy and quality control standards.
Another persistent myth is that all QSM11 engines are physically identical and can be interchanged freely. This is false. A QSM11 marine engine features completely different cooling profiles, exhaust manifolds, and governor settings compared to the QSM11-C400 off-highway diesel engine. Attempting to drop a marine or generator-spec QSM11 into a heavy wheel loader will result in severe overheating and ECM faults. You must specifically source a QSM11-C400 replacement for construction equipment to ensure correct flywheel housing dimensions and hydraulic pump PTO mounts.
Exploring the Cummins M-Series Engine Lineup
The QSM11-C400 engine specifications and applications discussed above represent the pinnacle of the 11-liter heavy-duty range, but it is just one configuration within a broader engineering family. Different machinery requires highly tailored horsepower curves, torque profiles, and emission standards to maximize operational efficiency. Whether you require the high output of the QSM11-C400 400HP or a slightly lower power rating for a different tier of equipment, the wider M-Series block offers versatile solutions for the construction and industrial sectors.
Cummins QSM11-Construction Diesel Engine Series, original products from Xi’an Cummins Joint Venture Plant (XCEC), since 1986, 50% owned by Cummins USA, under Cummins Technical & Product Line. This series mainly includes QSM11-290, QSM11-300, QSM11-335, QSM11-350, QSM11-360, QSM11-375, QSM11-400.
Frequently Asked Questions
How do I verify the Cummins QSM11-C400 engine price and exact fitment?
To receive an accurate Cummins QSM11-C400 engine price, we require your current engine's serial number (ESN) or the machine's model number. This ensures the Cummins QSM11-C400 replacement engine assembly price we quote matches your exact flywheel, oil pan profile, and ECM calibration needs.
What is the Cummins QSM11-C400 lead time for international orders?
As a leading QSM11-C400 engine supplier China, HekoPower typically maintains a standard Cummins QSM11-C400 lead time of 15 to 20 business days for single-unit orders. QSM11-C400 engine shipping from China is arranged via secure wooden crate packaging optimized for sea freight, protecting the block and sensitive electronics from moisture.
Does the engine come with a factory warranty?
Yes, every original QSM11-C400 engine we supply includes a comprehensive Cummins QSM11-C400 warranty. This standard 12-month global warranty covers major structural components and electronic failures, provided the engine is installed correctly and maintained according to OEM intervals.
Can I buy Cummins QSM11-C400 engine units in bulk?
Absolutely. HekoPower operates as both a direct QSM11-C400 engine exporter and a QSM11-C400 engine wholesale distributor. We provide tiered pricing structures for OEM manufacturers, fleet operators, and regional heavy equipment repair facilities looking to stock QSM11-C400 industrial power engines.
