Dutch crane manufacturer Montarent recently showed its new self-erecting tower crane on a self-propelled undercarriage, the Montalift M21-4WDS, at a customer demonstration in Southampton, England.
Montarent director Cor Koopmans explained that the IGO 21 superstructure is from Potain, but they have manufactured the self-propelled 4WDS undercarriage.
“Two years ago we bought the self-erecting tower crane from Manitowoc and then, we decided to enable the mobility, providing all the system for this machine,” he said. “We took the total responsibility to assemble the new Montalift, including many tests and all the process of CE-certification.”
The machine can be driven fully erected and has electro-mechanical four-wheel drive with two speeds and four-wheel steer.
Koopmans showed how the crane can be driven and steered via cable control unit with pushbuttons.
The 21m self-erecting tower crane has a jib of 26m and lifting height of 18.7m or maximum 25.9m with a raised jib.
The inverter controls all the operations such as lifting, trolley, and slewing motion with a maximum capacity of 1.8t.
Features include an octagonal galvanised tower and a compact galvanised lattice jib. The machine is equipped with a maximum load and load moment safety systems.
During the demonstration Cor Koopmans showed to some rental companies how this self-erecting tower crane could be operated and erected in 10 minutes via radio-control with display.
He said: “It’s like a toy for big boys and you can use in several applications, for example house building, renovation works, steel construction and small business units. The Montalift M21-4WDS is versatile and can be operated in confined spaces with hydraulic outriggers, which stand at 3.9m instead of 7m with a normal crane.”
The steel counterweight of 2 x 4150 kg is removable, and the crane has a back swing radius of 2.13m.