It is available with both shovel and backhoe attachments. Komatsu PC8000-6 has an operating weight of up to 710t, making it the fifth largest hydraulic mining excavator. The excavator is powered by two 16-cylinder Cat 3516B diesel engines producing up to 4,000hp at 1,800rpm. The shovel loading capacity is 40m³ with a breakout force of 2,320kN. The Demag H740 OS is a front-shovel excavator with a wider car body and trackpad than its predecessors. It has been in service since 1999 and was specially designed for the abrasive oil sands works of KMC Mining in Canada. With an operating weight of 744t, the Demag H740 OS excavator is the fourth biggest mining excavator. The excavator is fitted with either two 16-cylinder Cummins QSK60 diesel engines producing 4,000hp power at 1,800rpm or two 12-cylinder MTU diesel engines generating 3,820hp at 1,800rpm. The digging and breakout forces of the excavator in backhoe operation are 1,760kN and 1,980kN respectively. The maximum crowd force and a breakout force of the shovel are 3,090kN and 2,395kN respectively. Both the backhoe bucket capacity and the shovel capacity of is 42m³. The cab height is 9.91m and the undercarriage measures 10.84m long. The excavator is available with a shovel attachment, weighing 810t, or a backhoe attachment at 800t. It was built by Liebherr at its Colmar factory in France in 2008. The excavator in third place is the Liebherr R9800. The electric version of the excavator, known as Hitachi EX8000E-6, comes with two Hitachi TFOA-KK electric motors with a total power output of 2,400kW. The Hitachi EX8000-6 is equipped with two 16-cylinder Cummins QSKTA60-CE diesel engines producing 3,880hp at 1,800rpm. The crowding and breakout force of the shovel are 2,870kN and 2,230kN, respectively. The excavator has a bucket capacity of 45m³ and a shovel capacity of 40m³, that can remove 75t of in a single load. The hydraulic excavator has a 9.9m high cab, is 10.5m-long, with an 8.65m-wide undercarriage and a maximum digging reach of 20.5m. The first Hitachi EX8000-6 ultra-large backhoe excavator was delivered to Stanwell’s Meandu coal mine in Australia in September 2013. It weighs 811t and is available with both shovel and backhoe attachments. The Hitachi EX8000-6, launched by Hitachi Construction Machinery in 2012, is currently the second largest hydraulic excavator. The hydraulic excavator is powered by two 16-cylinder Cat 3516B or Cummins QSK60 diesel engines with a maximum power output of 4,400hp at 1,800rpm. The arm crowd force and the breakout force of the shovel are up to 3,300kN and 2,400kN, respectively. The shovel on the excavator has the capacity to hold 45m³ of rock in a single scoop. The undercarriage width is 8.6m and the crawler length is 10.98m. The Bucyrus RH400 is a front-shovel excavator weighing approximately 889t.
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