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Genuine DCEC Cummins ISZ425-40 Engine: The 13L 425HP Heavy-Duty Powerhouse
The Genuine DCEC Cummins ISZ425-40 Engine is a flagship 13L heavy-duty power unit built by Dongfeng Cummins, delivering 425HP output and meeting strict Euro IV emission standards. As a professional HekoPower Cummins ISZ engine supplier, we supply original, serial-number-verified ISZ425-40 engines with full factory certification, supporting wholesale and replacement demands for global heavy-duty vehicles. This engine stands out with superior XPI fuel system, strong torque performance, and excellent adaptability up to 5200m altitude, making it a top choice for heavy trucks, logistics fleets and mining equipment.
Tech Specs of Cummins ISZ425-40
General Engine Data
Engine Model: Cummins ISZ425-40
Type: 6 Cylinders in Line
Displacement: 13 L
Bore * Stroke: 130 * 163
Net Weight (with flywheel & alternator): 1195 Kg
Overall Dimension: 1389mm*1016mm*1233mm
Key Performance Data
Rated Power: 317 kW/425 HP
Rated Speed: 2100 rpm
Idle Speed: 600-800 rpm
Max. Altitude For Continuous Running: 5200 m
Torque/Rated Speed: 1441 N.m @ 2100 rpm
Max. Torque/Speed: 1966 N.m @ 1200 rpm
Max. No-Load Speed: 2300 rpm
More Technical Data
Certification: Euro IV
Aspiration: Turbocharged & Charge Air Cooled
Fuel System: Cummins XPI Fuel System/ECM
Compression Radio: 17:1
Starting System: Electrical Starting Motor 24V(750A)
Lowest Starting Temp Without auxiliary system: -15℃/-30℃
Cooling Method: Water cooled
Engine Cooling Fluid Volume: 23.1 L
Technical Deep Dive: ISZ425-40 XPI Fuel System Specs
The defining characteristic of the DCEC ISZ425-40 Euro IV 13L engine is the Extra-high Pressure Injection (XPI) system. Unlike standard common rail systems, the XPI technology allows for multiple injection events at pressures exceeding 2400 bar.
Why XPI Matters:
- Torque Performance: Enables the Cummins ISZ425-40 max torque of 1966 N.m at 1200 rpm, providing superior "pulling power" under heavy loads.
- Fuel Efficiency: Results in a Cummins ISZ425-40 fuel consumption rate of 205 g/kW.h, optimizing operating costs for large fleets.
- Cold Start Reliability: Coupled with advanced electronics, it ensures a -15℃ cold start Cummins ISZ425-40 engine capability without external heating.
Application Scenarios and Industry Use
High-Altitude Transport
One of the ISZ425-40's standout features is its capability in thin air. It is recognized as one of the Best 13L engine for high-altitude transport (5200m). The turbocharging system is calibrated to maintain power output where other engines might struggle, making it the perfect ISZ425-40 engine for 5200m high-altitude vehicles.
Heavy-Duty Trucking & Logistics
As a Replacement ISZ425-40 engine for Dongfeng Kinland trucks, this unit is a direct fit for major heavy-duty platforms. It is also increasingly used as an ISZ425-40 engine for logistics fleet operations where fuel economy is paramount.
Industrial & Mining
Beyond the road, the ISZ425-40 Mining Truck Engine variant powers essential equipment. Its robust block and ISZ425-40 cold start performance -30°C ensure reliability in freezing mining environments.`
ISZ425-40 Engine Comparison
ISZ425-40 vs ISZ450-40
- ISZ450-40 offers higher power output
- ISZ425-40 provides better fuel efficiency and cost-effectiveness
ISZ425-40 vs ISM Engine
- ISZ: newer platform, higher torque
- ISM: older generation, lower fuel efficiency
Cummins ISZ vs ISLe Engine
- ISZ (13L): heavy-duty, high torque
- ISLe (8.9L): medium-heavy duty, lighter applications
Maintenance and Longevity: ISZ425-40 Maintenance Schedule
To protect your investment, HekoPower provides a comprehensive maintenance schedule for Cummins ISZ425.
Critical Maintenance Data:
- Oil Capacity: Ensure the correct 15W-40 lubrication for the ISZ425-40 compression ratio 17:1.
- Cooling Fluid: The ISZ425-40 engine cooling fluid volume 23.1L must be maintained with high-quality anti-corrosion coolant.
- XPI Maintenance: Use only genuine OEM parts for Cummins ISZ425-40, specifically the XPI fuel filters, to prevent injector fouling.
Maintenance Schedule Recommendations
- Regular inspection of XPI fuel injectors
- Engine oil and filter replacement at recommended intervals
- Cooling system maintenance (coolant capacity: 23.1L)
Common Problems and Solutions
- Injector wear → Replace with OEM parts
- Fuel pressure issues → Check XPI system
- Cold start difficulty → Inspect battery and fuel system
Wholesale Procurement: ISZ425-40 Price and Fast Delivery
HekoPower is a genuine Cummins ISZ425-40 supplier committed to reducing downtime. We offer 10 business days fast delivery on our ISZ425-40 wholesale engine inventory. Every unit comes with a 12-month warranty ISZ425-40 engine supplier guarantee. Whether for a mining truck engine replacement or a 500kVA generator set application, we provide the ISZ425-40 technical datasheet PDF and full export documentation for global shipping.
DCEC ISZ Series, original products from Dongfeng Cummins Engine Plant (DCEC), Cummins Joint Venture Plant since 1986, 50% shareholding by Cummins USA. This series mainly includes ISZ425-40, ISZ450-40, ISZ480-40, ISZ525-40.
FAQ – Cummins ISZ425-40 Engine
What is the fuel consumption of ISZ425-40?
Approximately 205 g/kW·h depending on load and operating conditions.
Is ISZ425-40 suitable for mining trucks?
Yes, its high torque output makes it ideal for heavy-duty mining applications.
Where to buy genuine ISZ425-40 engine?
HekoPower provides original engines with warranty and global shipping.
