Komatsu’s productive new dozer offers high performance for its size
New generation bulldozers are coming to market that are more powerful, more productive and more efficient. Both Komatsu and Liebherr are upgrading and expanding their model ranges at present.
From Komatsu Europe comes the highly efficient D61EX/PX-24 dozer, which is said to be versatile and able to carry out a wide array of grading or earthmoving applications. Improved features include an upgraded cab and a new automatic idling engine shutdown system. Proven features from the earlier model have been retained while the dozer is now powered by a Stage IV/Tier 4 Final compliant diesel engine that is said to offer both high power output and high fuel efficiency. This 6.8litre SAA4D107E-3 diesel delivers 125kW and features a heavy-duty aftertreatment package including2300 Komatsu diesel particulate filter (KDPF) and selective catalytic reduction (SCR). The engine drives the dozer through a highly efficient hydrostatic transmission, helping boost overall productivity.
Component wear life is extended through design upgrades and one feature of the D61EX/PX-24 is that the final drive has additional protection from dirt and damage due to a new triple labyrinth seal, for extra durability.
The machine is equipped with the latest version of the firm’s sophisticated KOMTRAX telematics package as well as the Komatsu Care complimentary maintenance program. These help optimise fleet management tasks and service support, as well as helping to protect the machine.
Meanwhile718 Liebherr is moving up a size class with its latest bulldozer development. The firm is now introducing a machine in the 70tonne class, which will compete with proven competitors in the shape of 178 Caterpillar’s current D10T2 and Komatsu’s D375A-6, as well as 1171 Shantui’s SD52-5 (this last aimed at sales in developing markets).
Liebherr is taking a major step in the bulldozer market with the launch of its new PR 776 model. This is the firm’s biggest ever bulldozer and also the first hydrostatically-powered crawler tractor in the 70tonne weight class.
The firm claims that the machine offers significantly lower fuel consumption than other bulldozers in this class, while its hydrostatic drive also helps reduce wear and tear on tracks and chains, a key cost saving. The dozer has been designed to make it easy to use with a joystick control as well as a good all-round view of the blade edges and the surrounding area
Power comes from a 12-cylinder Liebherr diesel delivering 565kW. The PR 776 has a maximum operating weight of 74tonnes and is equipped with an 18m³ semi-U blade or a 22 m³ U blade.
The ECO function is standard for all Liebherr Generation 6 dozers, including the new PR 776 and this allows operators to choose between high performance and maximum efficiency. The ECO control system enables greater travel drive efficiency in light to medium operations, and also provides greater fuel savings.
The proactive power control is another innovation and if required, engine power is automatically increased for a brief period based on need. As well as responding more rapidly, the machines offer an increase in performance and pulling power and a higher reverse speed.
The intelligent engine management system combines with the power efficiency system and hydrostatic to maintain constant engine speed, increase overall machine efficiency and reduce fuel consumption. Another advantage when working in restricted spaces is the manoeuvrability, with continuous power to both tracks.
Liebherr has also custom-developed different configuration packages in-house for extreme applications such as deserts where extreme climates and low temperatures are common.
The standard Liebherr fleet management system LiDAT provides an accurate, efficient overview of essential servicing work, warning messages, the machine’s position and actual consumption data and filling levels. Capable of handling ripping work, heavy earthmoving duties and fine dozing, the Liebherr machines are said to be reliable and productive and able to handle an array of dozing tasks. The new PR776 will be equipped with the firm’s latest Generation 6 crawler dozer technology, such as the proactive power control, ease of maintenance concept and a modern cab.
The company is continuing with its policy of manufacturing key components in-house, such as the drive and engine. As with other machines in the range, the new dozer’s rugged engine block will add to stability and traction while its hydrostatic drive will deliver accurate steering under load and high working efficiency.
From Komatsu Europe comes the highly efficient D61EX/PX-24 dozer, which is said to be versatile and able to carry out a wide array of grading or earthmoving applications. Improved features include an upgraded cab and a new automatic idling engine shutdown system. Proven features from the earlier model have been retained while the dozer is now powered by a Stage IV/Tier 4 Final compliant diesel engine that is said to offer both high power output and high fuel efficiency. This 6.8litre SAA4D107E-3 diesel delivers 125kW and features a heavy-duty aftertreatment package including
Component wear life is extended through design upgrades and one feature of the D61EX/PX-24 is that the final drive has additional protection from dirt and damage due to a new triple labyrinth seal, for extra durability.
The machine is equipped with the latest version of the firm’s sophisticated KOMTRAX telematics package as well as the Komatsu Care complimentary maintenance program. These help optimise fleet management tasks and service support, as well as helping to protect the machine.
Meanwhile
Liebherr is taking a major step in the bulldozer market with the launch of its new PR 776 model. This is the firm’s biggest ever bulldozer and also the first hydrostatically-powered crawler tractor in the 70tonne weight class.
The firm claims that the machine offers significantly lower fuel consumption than other bulldozers in this class, while its hydrostatic drive also helps reduce wear and tear on tracks and chains, a key cost saving. The dozer has been designed to make it easy to use with a joystick control as well as a good all-round view of the blade edges and the surrounding area
Power comes from a 12-cylinder Liebherr diesel delivering 565kW. The PR 776 has a maximum operating weight of 74tonnes and is equipped with an 18m³ semi-U blade or a 22 m³ U blade.
The ECO function is standard for all Liebherr Generation 6 dozers, including the new PR 776 and this allows operators to choose between high performance and maximum efficiency. The ECO control system enables greater travel drive efficiency in light to medium operations, and also provides greater fuel savings.
The proactive power control is another innovation and if required, engine power is automatically increased for a brief period based on need. As well as responding more rapidly, the machines offer an increase in performance and pulling power and a higher reverse speed.
The intelligent engine management system combines with the power efficiency system and hydrostatic to maintain constant engine speed, increase overall machine efficiency and reduce fuel consumption. Another advantage when working in restricted spaces is the manoeuvrability, with continuous power to both tracks.
Liebherr has also custom-developed different configuration packages in-house for extreme applications such as deserts where extreme climates and low temperatures are common.
The standard Liebherr fleet management system LiDAT provides an accurate, efficient overview of essential servicing work, warning messages, the machine’s position and actual consumption data and filling levels. Capable of handling ripping work, heavy earthmoving duties and fine dozing, the Liebherr machines are said to be reliable and productive and able to handle an array of dozing tasks. The new PR776 will be equipped with the firm’s latest Generation 6 crawler dozer technology, such as the proactive power control, ease of maintenance concept and a modern cab.
The company is continuing with its policy of manufacturing key components in-house, such as the drive and engine. As with other machines in the range, the new dozer’s rugged engine block will add to stability and traction while its hydrostatic drive will deliver accurate steering under load and high working efficiency.
