Kato SL-750RfIII Load Chart PDF + Specifications

The Kato SL-750RfIII, designated KR-80H-FM2, represents the evolution of Kato’s SL-series rough terrain crane concept, combining a high-capacity telescopic boom with the company’s unique hydraulic SL Jib system. Unlike conventional fixed lattice fly jibs, the SL Jib can be telescoped and luffed hydraulically from the operator’s cab, significantly reducing setup time and improving operational flexibility when working around obstacles or in confined spaces. The crane belongs to the 75-ton lifting class and was developed for contractors seeking increased lifting height and versatility without sacrificing the mobility advantages of a rough terrain crane.

The crane is equipped with a six-section box-type hydraulic boom extending from 10.0 m to 45.0 m. The telescoping system uses synchronized extension, with the second and third boom sections extending simultaneously and the fourth, fifth, and sixth sections extending together. Maximum rated lifting capacity is 75,000 kg at a 2.3 m working radius on the fully retracted 10.0 m boom using 20-part reeving. Other key capacities include 40 tonnes on the 13.0 m and 17.0 m boom lengths, 38 tonnes on the 20.0 m boom, 35 tonnes on the 24.0 m boom, 14 tonnes on the 31.0 m boom, 13 tonnes on the 38.0 m boom, 10.2 tonnes on the 42.0 m boom, and 8.2 tonnes on the fully extended 45.0 m boom. Maximum boom tip height reaches 46.0 m.

A defining feature of the SL-750RfIII is its three-section hydraulic SL Jib. The jib extends from 9.52 m to 18.0 m and can be hydraulically luffed through offsets ranging from 5° to 60°. This system allows operators to adjust both jib length and working angle without leaving the cab. Rated capacities are 4.2 tonnes on the 9.52 m jib, 2.8 tonnes on the 13.8 m jib, and 1.8 tonnes on the fully extended 18.0 m jib. When mounted on the fully extended 45.0 m boom, the crane achieves a maximum lifting height of 64.0 m, providing substantial reach for high-rise and industrial applications.

The hoisting system consists of two independent hydraulic winches driven through planetary gear reducers with integrated negative brakes. Main hoist rope speed reaches 130 m/min while auxiliary hoist speed reaches 120 m/min. High-speed lowering reaches approximately 157 m/min under no-load conditions. Main hook lifting speed is 6.0 m/min using 20-part reeving, while the auxiliary hook can operate at 120 m/min on a single line. The crane also features a 5.6-ton rooster sheave for light-duty lifting operations.

Boom elevation ranges from 0° to 84°. Raising the boom from horizontal to maximum elevation requires approximately 63 seconds, while extending the full 35 m telescoping stroke takes approximately 125 seconds. Slewing is provided by a hydraulic motor driving a planetary reduction gearbox with selectable high- and low-speed operation. Maximum slewing speed is 1.85 rpm and rear swing radius is maintained at only 3.55 m, allowing operation in restricted work areas.

The outrigger system is a fully hydraulic H-type design incorporating integrated floats and vertical cylinders. Six outrigger spread positions are available: 7.6 m, 7.2 m, 6.5 m, 5.4 m, 4.3 m, and 2.55 m. Individual load charts are provided for each extension width, enabling safe operation when full outrigger deployment is not possible.

Power is supplied by a Cummins QSL9-4C diesel engine compliant with Japan’s 2014 emission regulations for special vehicles. The water-cooled six-cylinder direct-injection engine has a displacement of 8.849 litres and develops 246 kW (330 hp) at 2,000 rpm, producing a maximum torque of 1,636 Nm at 1,100 rpm. The engine is coupled to a fully automatic transmission with manual shift capability, six forward gears, and two reverse gears. A torque converter with automatic lock-up clutch enhances efficiency and drivability.

The carrier is built on Kato’s YDS-KRC030 four-axle chassis. Drive modes can be switched between 8×4 and 8×6 depending on operating requirements. Maximum travel speed is 49 km/h and gradeability reaches approximately 53%. Five steering modes are available, including front-wheel steering, rear-wheel steering, counter steering, crab steering, and independent steering. The minimum turning radius is only 7.4 m when operating in eight-wheel steering mode.

Safety equipment includes Kato’s ACS (Automatic Crane System) overload prevention system with voice warning capability, automatic swing stop, anti-two-block protection, work area limitation system, automatic outrigger width detection, electronic level indicator, boom and jib lowering prevention systems, winch protection devices, swing lock, and outrigger locking systems. Depending on specification level, the crane can also be equipped with Kato’s Safety View System, incorporating human detection assistance, surround-view cameras, a 12.1-inch touchscreen display, PDF document viewing capability, and clearance sonar systems for improved site awareness.

The operator cab is designed for long working shifts and includes automatic climate control with dehumidification, liquid-sealed cab mounts, a fully adjustable suspension seat with armrests and headrest, power windows, front and roof wipers, USB power outlets, Bluetooth audio capability, winch monitoring camera, LED work lights, and various ergonomic enhancements.

Overall dimensions are 12.99 m in length, 2.85 m in width, and 3.75 m in height. Gross vehicle weight is approximately 41.2 tonnes. Despite its larger lifting capacity and four-axle carrier, the crane remains compact enough for operation on congested urban jobsites while providing lifting performance approaching that of larger all-terrain cranes.