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The optional deluxe filtration system prevents downstream contamination in case of a failure. The Cat planetary power shift transmission is electronically controlled and features three forward and three reverse speeds.
The impeller clutch torque converter allows the operator to match rimpull to the application and underfoot conditions through the use of a foot pedal and adjustments made through the rimpull control system.
The all-wheel drive design features four planet carrier gears with planetary double reduction in each wheel. Double reduction final drives significantly reduce power train stresses and effectively extend power train life and durability.
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Options for reduced maintenance include the Oil Renewal System (ORS). By regularly burning small amounts of engine oil and automatically adding makeup oil to the crankcase, ORS offers a means to reduce or eliminate engine oil changes and to increase machine availability.
Another interesting option is zip-in zip-out glass. This feature provides rubber-mounted glass, which does not require adhesives to retain the glass. The system enables fast changes of damaged glass.
Articulated Hauler
Few quarries operate without a fleet of dump trucks to take away the rubble, and a flexible and highly efficient way of doing this is with an articulated hauler. Volvo claims to have invented the concept back in the 1960s.
The current E-series haulers have a long list of features that set them apart from their predecessors including a payload of 33.5 tonnes,while the patented planetary transmission features smooth shifting providing maximum rimpull (which loosely is the amount of power the truck can transmit between the tyre and the contact patch of the ground.)
The maker says that electronic monitoring of fluid levels means enhanced reliability as well as no need for daily service. Downtime during service is short, thanks to fewer service points on a new suspension design.
A fully loaded body is raised in only 12 seconds, and lowered in only 9 seconds, while the new design of the cabin leaves plenty of room for personal items such as a lunchbox and the seat features air-suspension.
Visibility around the machine is improved even more over predecessors with the large rearview mirrors, large windscreen and windows.
Giant Excavator
Even in quarry pits, really big excavators and mining shovels are a rarity in this region. That said, there is now at least one more to chose from, with the launch of a massive new 800-ton machine at the MineExpo show, held in Vegas last year.
Liebherr announced the R 9800 mining excavator. Rated at 800 tons of service weight the R 9800 provides a nominal bucket capacity of 38 to 42 m³ at a material density of 1,8 t/m³. This new flagship of the German firm’s mining excavators’ range is targeting bucket loads of 75 tons in both versions, as a backhoe and a shovel execution.
The maker is providing for the machine two engine options, two Cummins QSK 60 with a installed power of 1,492 kW / 2,000 hp each or two MTU 12V4000 with a installed power of 1,425 kW / 1,910 hp.toughest mining conditions.
The first units of the new flagship are currently in the final stages of factory testing and the first machine is soon due for operation in Australia.
The accolade for the largest machine at the show was the Hitachi EX5500-6, which broke the record (as far as we could tell) for the largest machine ever bought to an indoor trade show, tipping the scales as it did at 570 tons. The newcomer features a choice of buckets up to 40 cubic yards, and is powered by two Cummins QSK50-C engines totaling 2,800 HP.
More recently, Bucyrus, which has now taken over Terex-Demag brought the RH200 to the Bauma show. This giant has a 50t payload capacity, an operating weight of 579t , though in this instance the machine stayed outside, performing demos for the crowds.
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