Develon launches 22.5-tonne demolition excavator

DEVELON has unveiled the new 22.5-tonne DX140RDM-7 demolition excavator.

Like the three larger models from 31 to 61-tonnes, the machine offers multiple configurations to choose from, including a multi-purpose version that can be used for other applications as well as demolition.

The choices available include a ‘Monolithic’ variant that features only a demolition arm without any possibility of interchangeability. Alternatively, like the larger machines, the DX140RDM-7 is also available in a dual format utilising a modular boom design and hydraulic lock mechanism, allowing users to change between different arms for demolition and digging.

In the fixed Monolithic version, the working range allows the machine to work with a demolition attachment to a maximum height of 16m. The recommended maximum tool weight in this mode is 1,450kg.

In common with the other models in the demolition range, the DX140RDM-7 is said to offer high visibility and a tiltable cab, particularly suited to high reach applications and providing a 30 degree tilting angle.

In the dual purpose version of the machine, the pin height and maximum tool weight are 14m and 1,450kg respectively (with a 2m extension as an option). All the components such as the undercarriage, tilting cab and shoes remain the same as in the fixed version. Only the modular boom design and hydraulic lock mechanism are different.

Develon added that the ‘innovative’ design ensures it is a simple process to change between a demolition boom and an earthmoving boom. A stand is provided to facilitate the boom changing operation, which is based on quick-change hydraulic and mechanical coupler connections. A cylinder-based system is used to push the locking pins into place to help complete the procedure.

The multi-boom design also allows the earthmoving boom to be mounted in two different ways, which with the demolition boom, provides further flexibility with a total of three different configurations for the dual purpose base machine.

The DX140RDM-7 has a hydraulically adjustable undercarriage, which extends to a maximum width of 3.7m. The width of the undercarriage can be retracted hydraulically to 2.5m in the narrow width position, which is said to be ‘ideal’ for transporting the machine. The mechanism is based on a permanently lubricated, internal cylinder design which minimises resistance during the movement and helps prevent damage to the components.

Standard safety features include a FOGS cab guard, safety valves for the boom, intermediate boom and arm cylinders, and a stability warning system.