April 1, 2012
Your complete guide to new and updated equipment and supplies in the aggregates industry.
Increased fuel efficiency
Case Construction Equipment launched its new CX210C full-sized excavator at the World of Concrete in January. The company says the excavator achieves 160 net horsepower using Tier 4 Interim-certified cooled exhaust gas recirculation technology that burns cleaner while delivering superior horsepower. Boom Economy Control lowers engine RPMs during the boom down and swing operation; the Auto Economy Control lowers RPMs when the joysticks are inactive. Swing Relief Control technology manages the hydraulic power allotted at the start of the swing operation, and Spool Stroke Control creates automatic pressure adjustment during digging operations.
A new narrow undercarriage version, measuring 8 feet, 6 inches in width, is available for easier transport. The machine is said to offer 10-percent fuel economy gains, 3-percent cycle-time reductions, and 7-percent lift capacity increases. Additional features include a 440-pound increase in operating weight to 47,800 pounds; a bucket digging force of 34,171 pounds; arm digging force of 24,729 pounds; and a maximum dig depth of 21 feet, 10 inches. Standard bucket sizes range from 0.65 to 1.53 cubic yards.
The spacious cab offers 7 percent more overall space and 25 percent more airflow. The machine is said to offer 19 percent better visibility from the driver’s seat compared to previous models. A rearview camera and optional side cameras feed video to a 7-inch LED monitor for additional safety. Vibration refinement on the cab’s reinforced tubular structure reduces noise levels to as low as 69.9 dBa.
Extended service intervals — 500-hour engine oil change intervals, 5,000-hour hydraulic oil change intervals, and 1,000-hour greasing intervals — are said to help reduce operating costs. Wide-open panels and ground-level access to grouped lubrication points allow for easy access during maintenance.
Improved sizer features
Almo Process says it recently optimized several features on its Mogensen sizer. The output ports were redesigned to optimize material flow and feature larger inspection ports and fixed fastenings. The vibration system’s capacity was increased through prevention of plugged mesh openings. The screen tensioning system was improved; its simplified concept is said to result in reduced maintenance time and an improved ability to withstand dust. The company says the newly redesigned dust covers are ergonomic and easy to handle and are designed to be scratch resistant and withstand heat to 185 degrees F.
Enhanced and upgraded excavator
The upgraded DX350LC excavator from Doosan Infracore Construction Equipment America boasts an interim Tier 4-compliant, 281-horsepower, six-cylinder DL08K water-cooled diesel engine that has been optimized for use with a cooled exhaust gas recirculation system, diesel oxidation catalyst, and diesel particulate filter. The turbocharged 486-cubic-inch engine features a common rail design with direct fuel injection, electronic control, and four valves per cylinder.
Cooling system upgrades include two variable-speed hydraulic fans, which allow the engine and oil cooling systems to be controlled independently, improving fuel efficiency and providing a quieter operator environment. Additional upgrades include a swing torque increase of approximately 8 to 11 percent; a digging force increase of approximately 5 percent; a lifting capacity increase of approximately 2 percent; and a boom-up speed improvement of approximately 6 percent.
The company says it uses a variable geometry turbocharger (VGT) to increase boost pressure at lower engine RPMs. The VGT varies the amount of boost supplied to the engine to optimize combustion over the entire RPM range and allows the engine to generate a greater amount of torque in a wider band in the RPM range. The new closed-center main control valve with electro-hydraulic pump control is exclusive to the DX350LC and leads to an approximately 20-percent increase in efficiency of the main control valve for improved fuel economy.
The larger cab features enhanced ROPS protection, as well a height lever and tilting function for the seat. The cabin mounting mechanism features a thicker dampening plate, and a coil spring has been added to reduce cabin vibration 20 percent. The joystick angle has been reduced from 25 degrees to 19 degrees to provide a more ergonomic profile and decrease interference with the operator’s legs.
Improved blast performance
The Daveytronic SP Digital Blasting System features a secure encoded proprietary communication protocol for both firing line control and wireless data transmission. Security is reinforced with the patented RFID technology and the unique ID tracking number of each detonator. New features include improved fragmentation and material uniformity, improved muck pile control to enhance excavation and dilution control, improved vibration control and repeatability, and the ability to allow larger blasts to further reduce downtime and increase productivity. The company says these new features allow the high-accuracy detonator to significantly improve blast performance.
Matches breaker frequency to ground conditions
The DXB260H hydraulic breaker from Doosan Infracore Construction Equipment America features two-speed control of breaker frequency, which allows the operator to match the breaker frequency to the ground conditions. The 5,400-pound breaker is designed for use with excavators in the 27- to 37-metric-ton weight range, specifically the Doosan DX300LC and DX350LC. Rated in the 8,000 foot-pound impact energy class and delivering up to 600 blows per minute, the breaker requires a hydraulic flow rate of between 39.5 and 63.5 gallons per minute.
Standard features include a cradle-mounted grease station that delivers continuous grease flow, and blank-fire protection that uses a cushion of oil at the base of the cylinder to reduce metal-to-metal contact. The breaker’s suspension system extends excavator workgroup life by absorbing harmful vibrations and stress waves. A patented main valve design reduces hydraulic pressure peaks that can reduce pump life, crack excavator workgroup welds, and cause system overheating. An energy recovery system increases strike power by using energy generated by piston rebound.
Cummins Inc. says its new QSL9 engine, with up to 400-horsepower output, is ready to meet 2014 EPA Tier 4 Final near-zero emissions standards with a next-generation compact catalyst and selective catalytic reduction (CCC-SCR) aftertreatment system. The company says the engine makes no performance compromises in order to meet the standard, retaining its proven fast engine response and reliability. The compact aftertreatment system is said to provide a fully passive, flow-through operation and enables the engine to further improve fuel efficiency up to 3 percent over the current engine.
China Manufacturers Alliance, LLC says its new Double Coin REM-15 all-steel radial off-the-road tires for loaders and graders offer lower operating costs without compromise in performance. The tire is engineered with a wide footprint for excellent traction, floatation, and ride. It is currently available in the 17.5R25 size, but it will be expanded to larger sizes in the future.
Eriez says its powerful magnetic pulleys provide automatic removal of unwanted iron from materials on conveyor belts, which prevents machinery damage and product contamination. The self-cleaning units, offered in permanent and electromagnetic designs, are available in 80 combinations of diameters from 8 to 36 inches and in belt widths from 8 to 60 inches. The Permanent Magnet Axial Interpole Pulleys are constructed of quality steel center tubes with welded dividers to securely hold magnet stacks. They are finish painted, and hub bore holes are coated to prevent rust or pitting.
Truck tire for mining applications
Goodyear Tire & Rubber Co. says its new G741 MSD truck tire boasts a 33/32-inch tread with a wide footprint, making it perfect for mining and construction applications. Additional features include an aggressive, self-cleaning tread design to help resist mud build-up and enhance grip; a cut- and chip-resistant tread compound that helps provide long-lasting performance on tough terrain; tread block sipes to enhance traction in wet, snowy, and icy conditions while helping to maintain dry traction; and an innovative sidewall design that allows chains to be placed above the tread blocks for enhanced traction and grip. The tire will be available in size 11R24.5, Load Range H in May.