Tadano has introduced its new four-axle all terrain crane, the AC 4.070-2. This 70-t-capacity model features a compact design, with a total length of 11.7 m, a width of 2.55 m and a travelling height of 3.8 m.
With a main boom length of 50 m, the crane can lift a good 7.1 t at a radius of 12 m, and this goes up to a total of 7.3 t at a radius of 10 m. “No other crane in its class can reach these lifting capacities,” said project manager Sascha Scholler, who was responsible for the development. As such, the AC 4.070-2 is an excellent assist crane for erecting large lattice boom crawler cranes, and also an ideal crane for residential and functional building construction projects.
Tadano offers two extensions for the 50-m main boom – a swing-away jib with a length of 6.5 m and a double folding swing-away jib with a length of 16 m, making it possible to reach a system length of up to 66 m. An optional runner is available as well.
The AC 4.070-2 can transport a sizeable maximum counterweight of 11.9 t by itself while staying within an axle load limit of 12 t, and it can still manage an impressive 4.4 t when the axle load is reduced to 10 t, said Tadano. This makes the AC 4.070-2 an extremely flexible and versatile taxi crane.
The IC‑1 Plus control system determines the crane’s lifting capacity for every boom position as a function of the superstructure’s slewing angle. The way these computations are carried out directly in the cab means the lifting capacity for a specific radius is no longer limited to the lowest value for a pre-calculated 360° lifting capacity, but is instead determined in real time. Thus the AC 4.070-2 is always able to take advantage of the maximum lifting capacity available to it, and the advantages provided by this system deliver invaluable support for lifts over the outriggers.
According to Tadano, when the IC‑1 Plus control system is used together with the Flex Base outrigger system, it enables the crane to take care of jobs that would normally be the exclusive purview of larger cranes. In fact, the Flex Base can be deployed to extend the outriggers in asymmetrical configurations instead of predefined extension positions, thereby allowing crane operators to get the outriggers as close to obstacles as possible and use the maximum possible outrigger spread in any scenario.
The Tadano IC-1 Remote telematics system for location-independent crane and fleet management is also available for the AC 4.070-2. This cloud solution provides remote access to all relevant crane data from anywhere, enabling online troubleshooting by Tadano Support.
Another highlight of the AC 4.070-2 is the Tadano Surround View system, which features a separate monitor in the carrier cab. It provides 360° visibility and graphically shows the maximum possible extension lengths for the outriggers and the counterweight tail-swing radius from a bird’s eye view perspective. With this system, the crane can be positioned at work sites more easily without the need for additional personnel.
Furthermore, the AC 4.070-2 can be fitted with E-Pack, an electro-hydraulic system that has an integrated 32-kW electric motor to deliver extremely quiet zero-emission crane operation. The E-Pack can be used to carry out all crane functions without any negative impact on the corresponding maximum lifting capacity. On top of this, the cost-effective single-engine design allows for climate-friendly crane operation, thanks to its compatibility with various alternative diesel fuels, such as HVO.
