Aggregates Manager Digital Magazine
Issue link: https://read.dmtmag.com/i/85644
by Kerry Clines, Senior Editor Supply CAN YOU DIG IT? This selection of 40-ton and larger excavators will have you digging up aggregates in record time. Kobelco Construction Machinery America TACKLES HEAVY APPLICATIONS Kobelco's new SK485 high-performance excavator is the largest of the company's Mark 9 excavator series. The company says the new model delivers up to a 15-percent improvement in fuel efficiency. Features include upgraded intelligent hydraulics; a new Economy power mode for greater fuel efficiency; a Tier 4 Interim Hino engine equipped with cooled exhaust gas recircula- tion (CEGR) emission technology; a new ROPS/FOPS cab with a larger, more comfortable work environment; and a low engine cover and standard rear-view camera for improved visibility. Additional features include swing flashers and step extensions. A full selection of buckets, couplers, and thumbs are available. Write 1 on reader card. Doosan Infracore Construction Equipment DESIGNED FOR HEAVY-DUTY QUARRYING Doosan says its largest crawler excavator, the DX700LC, is designed for heavy- duty mining and quarrying. The excavator features an operating weight of 156,748 pounds with standard boom and arm, 35.4-inch double grouser shoes, and a 4.32-cubic-yard bucket. It provides a bucket breakout force of 78,485 pounds with standard bucket. Maximum digging reach is 41 feet, 8 inches at ground level; maximum digging depth is 25 feet, 5 inches. Additional features include a new power mode control system, an electronic power optimizing system (EPOS), and a six-cylinder common-rail diesel engine. Write 3 on reader card. 30 AGGREGATES MANAGER April 2012 Hitachi Construction Machinery Co. BOOM/SWING PRIORITY MODES The Hitachi EX1200-6 hydraulic excavator comes with a front-shovel bucket range of 7.7 to 8.5 cubic yards. The machine features an auto-level crowd mechanism for one-lever crowding of the bucket into the material at a constant level, which is said to keep a cleaner floor and increase bucket fill. Boom Priority mode increases boom- raise speed to reduce cycle time when the swing angle is small in a cycle of digging, swinging, and dumping. Swing Priority mode increases swing speed when the swing angle is large. The unit is also available in backhoe configuration with standard and bulk excavation booms. Write 2 on reader card. Caterpillar Inc. REFINED DESIGN, ADDED SAFETY Cat says its 198,000-pound 390D L hydraulic excavator incorporates a refined design that provides greater hydraulic power, stronger structural components, and added safety and convenience features, plus improved serviceability when compared to its 385C predecessor. This is said to create a more productive, more durable, more ef- ficient machine that is comfortable to operate. An increase in hydraulic operating pres- sure, combined with larger-diameter hydraulic cylinders, results in a 7-percent boost in digging-arm and bucket breakout forces.