The new Potain MDT 489 topless crane from Manitowoc fills the gap between the manufacturer’s popular MDT 389 and new MDT 569 models and is ideal for large-scale construction and infrastructure projects, especially the installation of large, prefabricated components, as well as for shipyards and mines with heavy loads to handle.

The MDT 489 delivers a high capacity with a maximum load of 22 USt (20 t) or 27.6 USt (25 t) and a 262 ft (80 m) jib for broad coverage and reach on the jobsite — all while offering the cost-saving benefits of easy transport and quick assembly and disassembly.

In addition, its compact crane configuration enables it to operate on tight and congested sites. The MDT 489 has been designed for high performance, while keeping the concept of using topless technologies that overlap and avoid collisions on jobsites with multiple cranes, unlike hammerhead tower crane models.

All components, save the slewing mechanism, can be transported in standard-sized shipping containers. The rotating section of the MDT 489 can be transported in just nine containers. That is four or five fewer than needed for a typical crane of this size, decreasing transport cost and complexity, as well as making access to the jobsite much simpler. Protective packaging with brackets helps secure the jib sections and cushioning pads within the containers protect the sections while facilitating efficient packing.

When the MDT 489 arrives at the jobsite, it is twice as quick to assemble as other cranes of a similar size. With a 262 ft (80 m) jib and 164 ft (50 m) mast, assembly takes a maximum of two days and requires very little space.

The MDT 489 can be placed on a 19.6 ft (6 m) or 26.2 ft (8 m) cross base platform and assembled in various configurations to best use the space and equipment available on the jobsite. The jib has been designed for easy and efficient erection with built-in slinging points. The jib sections can be assembled in different configurations to offer jobsite flexibility according to the assist crane size and ground space available. The heaviest jib section weighs only 7.39 USt (6,7 t). The rotating cab and thoughtful design of the counter-jib connection points also make for easy mounting.

Using Manitowoc’s Crane Control System (CCS), the MDT 489 can be set up in just 15 minutes. Moreover, this feature promotes highly controlled and efficient operation throughout the crane’s time on the jobsite. The trolley offers two falls for fast duty-cycle lifting or four falls for heavy lifting. The wire ropes for the trolley can be tensioned and then the sensor recalibrated simply by using a push-button inside the operator cab. This is ideal for long-term jobsites that require more frequent tensioning. Once the MDT 489 has completed its work on the jobsite, it can be quickly and easily disassembled, ready to make way for other cranes or move on to its next job.