Kobelco CKS900

The Kobelco CKS900 is a 90-ton capacity lattice boom crawler crane and a member of the S series developed specifically for international markets. It incorporates many features from Kobelco’s proven G series while tailoring its configuration to be more transport-friendly and suitable for countries with different infrastructure and regulatory requirements. With its advanced combination of capacity, efficiency, and ease of transport, the CKS900 is well-suited for construction, civil infrastructure, and industrial lifting projects globally.

The CKS900 offers a maximum lifting capacity of 90 tons at a 3.9-meter radius. Its crane boom can be configured from 12.2 meters up to a maximum of 61.0 meters, while the optional fixed jib extends lifting capabilities with lengths from 9.1 to 18.3 meters, reaching a maximum combined boom and jib configuration of 51.8 + 18.3 meters.

Powered by a HINO J08E-VM engine, the CKS900 delivers 213 kW (285 hp) at 2,100 rpm. This 4-cycle, water-cooled, 6-cylinder direct-injection engine with turbocharger and intercooler drives the crane’s main systems. The hydraulic system comprises three variable displacement piston pumps, and the oil reservoir has a capacity of 440 liters, allowing for smooth, efficient operation. The rated line pull is 112 kN (single line), with a line speed of up to 120 meters/min for the main and auxiliary winches using 26 mm diameter wire rope.

The undercarriage of the CKS900 features a steel-welded structure with 800 mm crawler shoes. The crane achieves a maximum gradeability of 40%, while the independent hydraulic propel drive for each crawler provides excellent maneuverability, including skid and counter-rotating steering. Transport weight is minimized with a 14.4-ton carbody, allowing for easier logistics and compliance with road regulations.

The upper structure incorporates a 31.9-ton counterweight and features a full-vision cab fitted with safety glass, ergonomic controls, and operator comfort elements such as a footrest, reclining seat, and air conditioning. Optional features include a counterweight self-removal system, ideal for remote job sites with limited lifting support.

Drum specifications include two front drums (240 m rope capacity), one rear drum (165 m capacity), and a third auxiliary winch (145 m rope capacity). All are driven by hydraulic motors via planetary reducers and equipped with hydraulically released multiple-disc brakes.

Built with serviceability and operational safety in mind, the CKS900 is engineered with a torsion-free machined upper frame and clearly labeled, easy-access components. Safety enhancements include external locking drum brakes, backstops, and optional load sensors for monitoring swing angle, counterweight amount, and ground level.

With its combination of lifting strength, compact design, and energy-efficient systems, the Kobelco CKS900 is a versatile crawler crane offering superior performance for modern lifting challenges across emerging and global markets.