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Load & Haul, Case Studies

Articles from EXCAVATORS (419 Articles)











With an operating weight of 90 tonnes, the R 976s are developed and produced at Liebherr-France SAS in Colmar, France.
With an operating weight of 90 tonnes, the R 976s are developed and produced at Liebherr-France SAS in Colmar, France.

Excavators prove their mettle in harsh African conditions

A pair of crawler excavators have demonstrated their reliability and economy in a South African coal mine.

With a fleet of more than 130 machines, the Liviero Group is South Africa’s largest privately black-owned multi-disciplinary construction group and a provider for mines that supply power plants across the nation.

The group has 17 Liebherr-branded machines in its fleet: one L 580 wheel loader, three PR 764 crawler dozers and 13 crawler excavators, including an R 970 SME, eight R 976s, two R 980 SMEs, an R 9100 and an R 9150.

It has recently purchased two new R 976 crawler excavators for overburden, coal mining and loading dump trucks in the Keaton Energy coal mine in Middleburg, in the north-east of South Africa.

After more than 2000 operating hours, the two crawler excavators have demonstrated their cost-effectiveness and reliability in operation. Each excavator is equipped with a 7.2-metre boom, a 2.9m stick and a 5.2m3 heavy-duty bucket.

With an operating weight of 90 tonnes, the R 976s are developed and produced at Liebherr-France SAS in Colmar, France. They have Liebherr-designed diesel engines with an output of 400kW, which complies with Stage IIIA/Tier 3 emission standards.

The R 976s are being used specifically for overburden, as well as for loading dump trucks in the mine. The 40-tonne dump trucks are loaded in four passes. With an average fuel consumption of 48 litres per hour, the excavators achieve an output of 280m3 per hour for 20 working hours per day. In a very hostile working environment, these machines have, to the satisfaction of Liviero Group personnel, proved their efficiency, cost-effectiveness and reliability in operation.

With an optimised hydraulic system and intelligent operation, the R 976 crawler excavator promises more productivity in earthmoving and quarrying work. Thanks to its kinematics and hydraulic power, the R 976 is capable of higher breakout and digging forces, even in extreme applications.

The operator cab provides a comfortable, spacious and ergonomic workspace to allow for more productivity. Mounted on visco-elastic elements, the cab is not subject to vibrations. Fully automatic air-conditioning and a high resolution touchscreen also enhance the operator’s comfort.

The operator has optimum visibility of the surrounding area thanks to a standard rear-view camera and a lateral camera, as well as an optimised upper carriage design. For enhanced safety, the R 976 also has a fully removable laminated windshield under the roof and a secure emergency exit at the rear of the cab.

Liebherr has decades of experience in the development and production of earthmoving machines for the quarrying industry, including crawler excavators, wheel loaders and crawler dozers.

With innovative designs and major components produced by Liebherr, the machines can be deployed with great efficiency and performance in the most challenging and difficult environments.

Quarrying machines from Liebherr can perform all tasks to spec and every component has been purpose-designed. They can feed breakers, sifting systems and trucks, and transport surface mine material. The machines work with immense power and advanced technology reduces fuel consumption – which is both economical and vital in the quarrying industry.


Source: Liebherr Australia



















Saturday, 23 March, 2019 5:54pm
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