In the powertrain systems of construction machinery and commercial transportation equipment, the ISB series of engines has earned widespread recognition for its robust and durable power output and stable performance. However, even the most reliable power platforms cannot withstand the continuous test of time. Issues such as power loss, rising fuel consumption, and excessive emissions—resulting from long-term, high-load operation—are realities that virtually every ISB engine must face. Faced with this dilemma—whether to spend a fortune on a brand-new engine or to make do with patchwork repairs and continue using the existing one—this was once a difficult choice that caused headaches for countless equipment managers. Today, Keluo offers a third option: a pragmatic path that balances performance and cost.
The ISB engine itself is a mature and reliable power platform. Its high-pressure common-rail fuel system achieves precise fuel atomization and complete combustion, delivering ample power while maintaining excellent fuel economy. The modular design simplifies system configuration, reduces failure rates, and makes routine maintenance more convenient. A wide peak torque output range and outstanding environmental adaptability ensure reliable starting even in low-temperature conditions. It is precisely these outstanding technical attributes that provide a solid foundation for the overhaul and remanufacturing of ISB engines. Keluo’s overhaul service is not merely a patch-up job, but a systematic remanufacturing process. Every ISB engine sent to the workshop undergoes thorough disassembly and cleaning. Technicians then use specialized equipment to perform comprehensive dimensional measurements and non-destructive testing on core components such as the cylinder block, crankshaft, and camshaft, scientifically assessing the degree of wear and the feasibility of remanufacturing. For components requiring replacement, Keluo’s comprehensive supply chain ensures the use of parts that meet—or even exceed—original equipment manufacturer (OEM) quality standards. During the core repair phase, cylinder bores are rebored, piston rings and bearings are replaced, the fuel injection system is calibrated, and all seals and bearings are replaced—with every step strictly executed in accordance with standard procedures and torque specifications. After assembly, the engine undergoes multi-stage load and performance testing on a dedicated test bench to comprehensively verify power output, fuel consumption, pressure parameters, and operational smoothness until all metrics meet the required standards.
The results of this rigorous remanufacturing process are tangible. Compared to standard overhauled engines, Keluo’s ISB overhauled engines deliver performance on par with new engines, feature a significantly lower failure rate, and have a service life of over 80 percent that of a new engine. Yet, their procurement cost is only 50 to 60 percent of that of a new engine. Featuring an inline six-cylinder, water-cooled, four-stroke design with a displacement of 5.9 liters, their power output ranges from 170 to 220 horsepower. Equipped with a Denso high-pressure common-rail system, it delivers injection pressures as high as 1,800 bar, ensuring thorough fuel atomization and low operating costs. The electronic control system intelligently manages air intake and fuel, striking an optimal balance between power and emissions to meet China V emission standards. From excavators to trucks to various types of construction support equipment, remanufactured ISB engines provide stable power output. Keluo has also incorporated overhauled engines into its regular inventory management, shortening delivery times to one to seven days to minimize equipment downtime. In addition to complete overhauled engines, Keluo supplies a full range of OEM-grade ISB parts, including cylinder heads, camshafts, water pumps, oil seals, gaskets, and more, enabling “one-stop” procurement of engines and parts.
Choosing Keluo’s overhaul service is more than just engine repair—it’s the delivery of a complete power solution. Pre-sales technical consultations help customers precisely match engine models to their needs, while a comprehensive after-sales service system responds promptly to fault resolution and maintenance inquiries. Korofa offers a clear warranty commitment for ISB overhauled engines, giving customers peace of mind. Keluofa fully understands the losses caused by equipment downtime, which is why it has established a rapid-response mechanism to ensure timely technical support is available. The core value of this service lies in significantly extending equipment service life and improving return on investment at a cost far lower than that of a new engine. Whether in infrastructure projects, mining operations, or long-haul freight—regardless of the application—overhauled ISB engines effectively reduce operating and maintenance costs while improving operational efficiency.
Hebei Keluo Construction Machinery Co., Ltd. is a large-scale construction machinery manufacturing group integrating R&D, production, and service. Headquartered in Shijiazhuang, Hebei Province, the company occupies an area of approximately 133,000 square meters and employs over 300 people. With more than 20 years of experience in the construction machinery engine sector, the company specializes in supplying new and used construction machinery, engines, and spare parts. Its products are exported to many countries worldwide, and the company has established a comprehensive overseas dealer network. Keluo has always adhered to a quality-first philosophy, providing reliable overhauled engines and matching parts to help customers’ equipment operate efficiently.
