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Liebherr's giant reaches for nibbles

LIEBHERR'S largest specialist demolition machine, the 107-tonne R974B Litronic, was unveiled at Intermat earlier this year.

The machine can reach an operating height of 35 m using optional boom extensions.

Powered by an eight-cylinder 317 kW Liebherr diesel engine, the excavator is controlled by the company's Litronic management sys-tem, which automatically restricts boom movement to a load radius of 16 m, keeping falling debris a safe distance away from the machine.

A quick-hitch option allows a range of demolition attachments from hammers to nibblers to be changed without the operator leaving the cab.

A Liebherr R984HD Litronic excavator was used to demolish an 80-m-high apartment block in Paris, requiring a working height of 32 m.

The machine was fitted with a 23-tonne long-reach attachment, comprising 8.5-m demolition stick, 2.7-m intermediate boom, 11-m demolition boom, 2-m extension and a La Bounty UP20 nibbler,

all mounted on top of the main boom.

The length and weight of the attachment required an additional counterweight of seven tonnes for stability, bringing the total weight to 103 tonnes. Visibility was increased with the fitting of a video camera on the stick, linked to a monitor in the cab.