Hitachi-Sumitomo UC25

The Hitachi-Sumitomo UC25 is a versatile 25-ton lattice boom truck crane, designed to meet the demands of a wide range of lifting tasks in construction, industrial maintenance, and infrastructure projects. With a rated maximum lifting capacity of 25 tons at a radius of 3.6 meters, the UC25 is suitable for medium-scale lifting operations that require both strength and maneuverability.

The crane features a high-tensile steel lattice boom, providing a balance between weight and strength. The standard boom length is 9.0 meters, consisting of a 4.1-meter top section and a 4.9-meter bottom section. The boom can be extended with optional sections up to a maximum length of 24.0 meters, which includes the base boom plus an extension of 6.0 meters. The boom is equipped with a 25-ton 3-sheave block for heavy lifting, and a 4.5-ton ball-type hook is also available for lighter loads.

The UC25’s winch system is highly efficient, providing a rated line speed of 95 meters per minute when unloaded and a load line pull of 44.1 kN (4.5 tons). The crane’s boom hoisting speed reaches 26 meters per minute, allowing for quick adjustments during operations. The boom hoist system is driven by a 305 mm root diameter drum with grooved wire ropes for improved durability and reliability during heavy lifting tasks.

Powering the UC25 is a Mitsubishi 6D16-E1 engine, a 6-cylinder, 4-cycle diesel engine with direct injection, producing 93 kW (126 PS) at 2,000 rpm. This engine offers a maximum torque of 461 Nm at 1,400 rpm, providing ample power for both lifting operations and crane mobility. The engine features an intercooler and preheater for optimal performance in a variety of conditions. Fuel consumption is efficient, supported by a 250-liter fuel tank, ensuring that the crane can operate for extended periods without frequent refueling.

The crane’s hydraulic system, referred to as the Seed-O-Matic Hydraulic Control System, features an internal expanding band clutch with a two-cylinder, two-shoe design. This system ensures smooth and precise operation of the crane’s functions, including hoisting, swinging, and boom movements. The swing system is spur-gear driven, using two sets of clutches to transmit power to the swing pinion, with a swing speed of 4.8 rpm for efficient and controlled load positioning.

The UC25’s undercarriage is built for stability and mobility, featuring a two-axle drive system with front axle steering and rear axle driving. The transmission is a 2-stage hydraulic remote control system with power shift capabilities, offering travel speeds of up to 18 km/h in high gear and 8 km/h in low gear. The crane is equipped with pneumatic 4-wheel brakes and steering systems such as ORBIT ROLL full hydraulic power steering, ensuring precise control during both travel and lifting operations. The crane has a turning radius of 8.0 meters at its outermost point, making it maneuverable even in tight job sites, with a gradeability of 15 degrees.

The crane’s safety systems include a comprehensive suite of devices to ensure safe operation. A Load Moment Limiter (SML-06) automatically prevents overloading by monitoring the crane’s lifting conditions. Additional safety features include boom over-hoist limiting devices, boom backstops, and alarms for hoist drum pawl locks, swing locks, and hook height limits. These systems enhance operational safety, ensuring the crane remains within safe operating parameters at all times.

The operator’s cabin is designed for both comfort and functionality, featuring acoustic insulation and climate control for long shifts. The cabin provides excellent visibility of the job site, with easy-to-reach controls that allow the operator to manage all crane functions from a single control panel. Ergonomic seating and advanced control levers reduce operator fatigue, contributing to smoother and more efficient crane operation.

In summary, the Hitachi-Sumitomo UC25 is a reliable and efficient 25-ton lattice boom truck crane designed for a wide range of lifting tasks. With its advanced hydraulic system, powerful Mitsubishi engine, and comprehensive safety features, it delivers strong performance and precise control, making it an ideal choice for construction, industrial, and infrastructure projects.