Excavators: Digging With the Big Boys

AggMan Staff | Published on June 15, 2011


This article was originally published in the September 2010 edition of Aggregates Manager. To see the digital edition version, which includes photos, click here.


Supply Lines

Digging with the Big Boys

This selection of 70-ton and larger excavators can help increase the production level at any quarry.

by Kerry Clines, Senior Editor


Liebherr Construction Equipment

Liebherr’s R 964 C Litronic offers a 29-foot, 10-inch digging depth; 75,400-pound breakout force; an operating weight of 150,790 pounds; and a lift capacity of 25 feet over end and side. Liebherr Tool Control allows operators to easily change hydraulic tools and adjust pressure and flow rates.


Doosan Heavy Construction Equipment

Doosan’s soon-to-be-debuted DX700LC features a six-cylinder, 463-horsepower turbo-charged Isuzu diesel engine and an operating weight of 158,953 pounds with standard boom and arm, 35.4-inch double grouser shoes, and 4.32-cubic yard bucket. Standard bucket breakout force is 78,485 pounds; arm breakout force is 78,044 pounds. Maximum digging reach is 40 feet, 10 inches at ground level; maximum digging depth is 25 feet, 4 inches. Dump height is 27 feet. Optional buckets range from 3.27 to 5.89 cubic yards.


Increased fuel efficiency, more horsepower, and improved hydraulics add up to greater production with these excavators.

Liebherr Construction Equipment

Liebherr’s R 964 C Litronic offers a 29-foot, 10-inch digging depth; 75,400-pound breakout force; an operating weight of 150,790 pounds; and a lift capacity of 25 feet over end and side. Liebherr Tool Control allows operators to easily change hydraulic tools and adjust pressure and flow rates.


Case Construction Equipment

Case says its CX800B is ideally suited for applications requiring heavy muscle and long reach. The 178,575-pound machine features an electronically controlled, common rail, 15.7L Isuzu engine and is available in standard and mass-excavation configurations.


Caterpillar Inc.

Caterpillar’s 156,043-pound 374D improvements include new buckets and a greater operating weight to boost loading and lifting capabilities, a stronger undercarriage, safety enhancements, and easier serviceability. The Cat C15 ACERT engine features electronic control, precise fuel delivery, and refined air management.



Komatsu

Komatsu says its PC800LC-8 Super Digger uses double-arm cylinders and an HD bucket cylinder to increase arm digging force by 19 percent and bucket digging force by 9 percent over a standard machine —  without sacrificing working range. The machine also features the Komtrax satellite monitoring system and on-board diagnostics.


These excavators feature cab improvements — more space, better visibility, increased safety, and reduced vibration — for increased efficiency and production.


Volvo Construction Equipment

The 70-ton Volvo EC700C has a Tier III-compliant engine with Volvo Advanced Combustion Technology for high torque at low revolutions. The machine boasts a hydraulic system with high breakout force, and a robust undercarriage and reinforced superstructure and boom/arm for greater endurance.


Kobelco

Kobelco says its SK850LC Super ACERA provides competitive breakout, drawbar pull, and swing torque forces. The unit is designed for easy transport — it can be configured four different ways to meet various local requirements. A centrally located catwalk and walking platform provide easy access for routine maintenance checks.


John Deere

John Deere’s 850D LC offers fast hydraulics, powerful swing torque, and generous drawbar pull. Its Powerwise III management system balances engine and hydraulic performance. The company says its generous hydraulic flow and best-in-class metering ensure powerful digging force, precise low-effort control, and multifunctional operation.


Hitachi Construction Machinery

Hitachi’s EX1200-6 comes with a front-shovel bucket range of 7.7 to 8.5 cubic yards, which matches well with 65-ton class trucks. An air-ride seat and improved joystick controls provide better ergonomics. Other features include improvements to the undercarriage and upper structure.


Hyundai Construction Equipment

The 181,880-pound R800LC-7A is the largest in Hyundai’s family of excavators. A lighting package — boom-mounted work lights and lighting built into the frame of the cab’s roof — make nighttime work easy. Maintenance and service is fast and easy with a centralized lube bank, wide-opening access door, and easy-to-reach filters.


LBX Company, LLC

The Link-Belt 700 X2 has an operating weight of 153,442 pounds with a maximum digging depth of 27 feet, 7 inches and a digging reach of 43 feet, 2 inches. The machine boasts precise and aggressive performance, as well as increased fuel efficiency.



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