Hitachi Construction Machinery

Global

Completion of Hitachi Construction Machinery’s 800-ton Ultra-large Hydraulic Excavator EX8000

15 Mar, 2004

Hitachi Construction Machinery Co., Ltd. (HCM; Shungo Dazai, President and Chief Executive Officer) developed the ultra-large hydraulic excavator EX8000 as the largest class in the world, with an operating weight of 780 tons and a loading shovel bucket capacity of 40m3.
Assembly has been completed for the EX8000, which exceeds the operating weight and loading shovel bucket capacity of the EX5500-5 by 270 tons and 13m3, respectively.
After the completion of detailed performance tests, the EX8000 will be scheduled for user tests in a Canadian mine from this October.
Until now, HCM has boasted the EX1900-5, EX2500-5, EX3600-5 and EX5500-5 ultra-large hydraulic excavators, with roughly 600 orders placed mostly in North America, Australia, Asia and South Africa, gaining HCM the top share in this class.
The EX8000 was developed as a response to the growing size of dump trucks designed to reduce costs at mines.

Development Concept and Key Features

1. Perfect Match for 300-ton Dump Trucks
  • Boasts awesome power and productive output as the largest class ultra-large hydraulic excavator in the world, with an arm crowding force of 2,870kN (293tf) and loading shovel bucket capacity of 40m3
  • Can load a 300-ton dump truck with four passes in two minutes
  • Features the latest technologies and structure, with an operating speed equivalent to the EX5500 despite the larger body
2. Roomy, Comfortable Cab Features Living Quarters
  • The rear of the wide cab acts as a small living space with a table, microwave and other conveniences to ensure comfort in even round-the-clock mining work.
3. Electronic Wrist Controls Ensure Light, Smooth Maneuvering for Extended Operations
  • The electronic wrist control provides maneuvering with a light touch and operatibility, thereby reducing fatigue over long periods of operation.
4. Proven Design that Emphasizes Reliability and Durability
  • Shares a common design with the EX3600-5, with shovel-type tracks and triple-roller swing bearing, and employs proven, highly-durable systems and components
5. Full Consideration Given to Maintainability and Accessibility
  • Designed for maintainability and accessibility using large access doors, large open spaces and a flat floor around the engine for easy maintenance and inspection, as well as an electric retractable ladder allowing easy access to equipment.
Specifications
EX8000 Unit Loading Type
Loading shovel bucket m3 40.0
Operating weight t 780.0
Engine model S16R-Y1TAA1
Engine power kW/min-1
(PS/rpm)
1,400/1,600×2
(1,900/1,600×2)
Crawler length mm 10,500
Crawler width mm 8,650
Ground pressure kPa (kgf/cm2) 235 (2.4)
Swing speed min-1 (rpm) 3.2 (3.2)
Travel speeds High/Low km/h 2.0/1.4
Max. arm crowding force kN (tf) 2,870 (293)
Max. digging reach mm 18,500
Max. digging depth mm 4,100
Max. cutting height mm 20,500

Note: Units are shown in the international standard of SI units. Figures in parenthesis denote original specifications.

040315

Ultra-large Hydraulic Excavator EX8000

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