Demag AC120/4J Load Chart PDF + Specifications

The Demag AC120/4J all terrain crane is engineered to deliver reliable performance and versatility in heavy lifting applications. With a maximum lifting capacity of 120 tons, the crane is built around a robust 4-axle carrier powered by a 335 kW (455 hp) MTU diesel engine compliant with Tier 3 emission standards, delivering 2000 Nm of torque at 1200 rpm. The drivetrain uses a ZF AS-Tronic automatic transmission with 12 forward and 2 reverse gears, ensuring smooth travel performance both on highways and challenging job sites.

The AC120/4J is equipped with a five-section telescopic boom extending from 11.9 meters to 50 meters. The boom’s single-cylinder pinning system allows for fast, reliable extension and retraction. The crane also offers various offsettable jib configurations, including a 17.9-meter swing-away extension, bringing the maximum system length to over 68 meters for high-reach lifts. Optional auxiliary jibs and hydraulic offset heads further enhance lifting versatility.

The carrier’s six-axle drive configuration (8x6x8) with hydraulic suspension ensures excellent maneuverability, stability, and gradeability. The AC120/4J features disk brakes on all axles and offers multiple steering modes, including crab, coordinated, and rear-axle steering, allowing tight turning radii on congested sites.

Safety features include an advanced IC-1 control system providing real-time load moment monitoring, automatic cutouts, operator alerts, and precise diagnostics. The crane also features automatic leveling outriggers with variable positioning and an axle load indicator for safe travel setup. The upper cab offers ergonomic controls, air conditioning, panoramic visibility, and real-time data on lifting parameters, slewing angles, and counterweight status.

The AC120/4J supports a wide range of optional equipment, including additional counterweights, hook blocks, heating systems, auxiliary winches, and camera monitoring packages. Its modular design allows components to be removed for transport, reducing axle loads to comply with road regulations.

Overall, the Demag AC120/4J provides a robust combination of high lifting capacity, advanced control systems, and flexible transport and assembly options, making it an ideal choice for heavy industrial, infrastructure, and urban construction projects where precision and power are critical.