Shantui SE26SR: A Benchmark for 2.8-ton Mini Excavators, Hardcore Mechanical Configuration Unlocks Diverse Operation Scenarios
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In the 2.8-ton mini excavator market, the Shantui SE26SR has become the preferred equipment for municipal maintenance, garden pruning, interior decoration, farmland water conservancy, and narrow space construction, with its solid mechanical quality, efficient operation performance, and flexible adaptability. As an upgraded masterpiece of Shantui's mini excavator series, it inherits the brand's gene of durability and reliability, and elaborates on core mechanical components such as power, hydraulic pressure, chassis, and working device, balancing flexibility and operation strength. Every mechanical design is tailored to actual operation needs, which not only highlights the exquisiteness of mini excavators, but also contains hardcore mechanical strength, redefining the performance standard of 2.8-ton mini excavators.
The power system is the core support of the Shantui SE26SR. The machine is equipped with a Japanese Yanmar 3TNV80F three-cylinder direct injection engine with a displacement of 1.267L and a rated power of 14.6kW/2400rpm. The power output is strong and smooth, perfectly complying with National IV, EU Stage V, and North American EPA certification emission standards, balancing environmental protection and operation efficiency [1][2][9]. The engine adopts efficient combustion technology with low fuel consumption. Combined with an exclusive cooling system, it can effectively avoid high-temperature overload and greatly extend the service life of the engine; at the same time, the engine oil change capacity is 3.4L, and the fuel tank capacity is 33L, which can meet the demand of long-term continuous operation. Daily maintenance is convenient, further reducing operating costs [2][9]. Its compact structure not only saves the internal space of the body but also reasonably controls the overall weight, laying a solid mechanical foundation for the flexible movement of the equipment.
The hydraulic system is the key to the smooth operation and efficiency of the Shantui SE26SR. The machine is equipped with a high-end load-sensitive hydraulic control system, adopting a variable displacement piston pump design with a rated working flow of 86.4L/min and a system working pressure of 24.5MPa. It can accurately distribute hydraulic flow according to the operation load, with small energy loss and excellent coordination of compound actions, smooth operation without jamming, greatly improving operation accuracy and efficiency [2][4][7]. The travel motor has an automatic speed regulation function, which can automatically adjust the travel speed according to the operation scenario, further improving travel efficiency; the optimized pipeline layout adopts a hidden design, effectively avoiding collision risks during construction and preventing hydraulic oil leakage. At the same time, it is equipped with a dedicated filter, which can effectively block the intrusion of impurities, avoid wear of hydraulic components, and extend the service life of the hydraulic system. In addition, the system supports the adaptation of various accessories, and can flexibly assemble hydraulic breakers, hydraulic shears, quick-change devices, augers, etc., realizing multi-functional operation and covering diverse operation scenarios [1][3].
The mechanical design of the chassis and working device fully highlights the flexibility and durability of the SE26SR. The total operating weight of the whole machine is about 2780-2880kg, with a total transport length of 4200mm, a total width of 1550mm, a total height of 2480mm, and a minimum ground clearance of 575mm. The compact structure can easily shuttle through narrow spaces that conventional excavators cannot reach, such as indoors, roadways, and greenhouses [2][5]. The chassis adopts a crawler design with a crawler width of 300mm and a track gauge of 1250mm, and the ground pressure is only 26.3-27.3kPa, which can adapt to operation in soft ground and avoid sinking; the travel speed is divided into two gears: 2.3km/h and 4.0km/h, the maximum traction force is 29kN, and the climbing capacity can reach 30°, with excellent stability during steep slope operation, which can easily meet the movement needs of different operation scenarios [2][9].
The working device adopts a reinforced structure design, comprehensively optimizes the layout of structural parts, and the key stress positions are strengthened to cope with the impact load of harsh working conditions, greatly improving durability [1][4][7]. The boom can operate flexibly, with a minimum swing radius of 2015mm for the front working device and 775mm for the rear swing radius, and the swing speed can reach 0-10r/min. The swing motor adopts a plunger design with a swing pressure of 23MPa, which is flexible and stable in operation, enabling non-dead-angle operation and easily meeting the needs of fine operations such as ditching and dredging [2][5]. The standard bucket capacity is 0.06-0.065m³ with a width of 460mm. The bottom plate and side plates are made of high-strength wear-resistant steel. The optimized bucket structure can reduce excavation resistance; the bucket digging force is 24kN, and the arm digging force is 14.8kN. Although the body is compact, the digging performance is strong, which can easily cope with operational needs such as earthwork excavation and gravel cleaning [2][9].
The mechanical optimization of control and maintenance further improves the operation experience and practicality of the SE26SR. The machine's cab (optional) is designed in line with ergonomics, with sufficient space and a wide field of vision. The operating devices are reasonably arranged, equipped with a 7-inch intelligent touch screen integrating rich functions, which enables more sufficient and intelligent human-computer interaction, can real-time monitor the equipment operation status, and greatly improves the convenience and comfort of operation [1][4][7]. At the same time, the whole machine adopts a large-area cover opening design. After opening, maintenance can be easily completed while standing on the ground. The air filter, fuel filter, and diesel filter are within easy reach. The grease filling ports on the slewing bearing are centrally arranged, making lubrication and maintenance more convenient, and greatly reducing daily maintenance costs and workload [1][4][7]. In addition, the whole machine is equipped with pressure-release mechanical braking, which further improves operational safety and comprehensively ensures the safety of operators and equipment.
Every mechanical design of the Shantui SE26SR is centered on "efficiency, durability, and flexibility". From the stable power of the Japanese Yanmar engine, to the precise control of the load-sensitive hydraulic system, and then to the flexible adaptation of the reinforced chassis and working device, it exerts the mechanical advantages of the 2.8-ton mini excavator to the maximum. With its compact body, it adapts to narrow spaces, and with its hardcore mechanical configuration, it copes with diverse working conditions. It not only meets the precise needs of light construction but also ensures the reliability of long-term operation, becoming a benchmark in the 2.8-ton mini excavator market. It not only highlights Shantui's profound accumulation in the field of construction machinery but also provides an efficient and reliable mechanical solution for small-scale construction.