MULTI-ARTICULATED BOOM

Several Volvo excavators adapted for tunnelling work were on the SSM stand, including a compact ECR58 model. It is a dual-fuel machine, powered either by its on-board ultra-low emissions diesel engine, or from an external electrical supply.

This midi tunnelling excavator features the unique SSM working equipment, which provides a high degree of movement and an extraordinary working envelope, particularly close-in to the machine. The same overall design of boom was fitted to the full-size Volvo

ECR335E NL tunnel excavator. It can not only perform roof-scaling work, but also bring the scaling bucket close to the sides of the machine, enabling excavation at the juncture of tunnel floors and sidewalls.