Aggregates Manager Digital Magazine
Issue link: http://read.dmtmag.com/i/772143
AGGREGATES MANAGER / January 2017 38 by Therese Dunphy | Editor-in-Chief | tdunphy@randallreilly.com SUPPLYLINES Excavator Enhancements Eye Bottom Line Greater productivity and fuel efficiency are common features in the latest generation of excavators. The updated John Deere 870G LC excavator offers a fuel-efficient Tier 4 Final diesel engine that boasts 512 horsepower. The production- class machine features cooled exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and selective catalytic reduction (SCR). With an improved piston design, the excavator burns particulate matter in the cylinder, so operators can save on service time and lower operat- ing costs without the need for a diesel particulate filter. The 87-ton machine also has a battery disconnect switch, spin-on fuel filters, and two additional water separators to maintain long fuel filter life. Engine and hydraulic oil sample ports streamline maintenance. An improved step position on the track frame and handrails provide multiple points of contact when accessing the engine compartment. John Deere | www.johndeere.com Kobelco's SK300LC is part of its Generation 10 lineup, which was developed with a focus on value, productivity, and durability. The 68,100-pound model is powered by a 252-horsepower Tier 4 Final HINO engine. The engine incorporates a selective catalytic reduction system with diesel particulate fil- ters, which converts NOx into nitrogen and water emisions. The dual system minimizes diesel exhaust fluid and decreases NOx emissions by 88 percent. The excavator delivers a bucket digging force of 37,300 foot pounds. Much of the boost comes from a new hydraulic regeneration system that aids the arm by reusing force generated by the boom to minimize energy loss. A higher boom foot cross-section, thicker arm-foot base plate, and stronger foot bases are provided for additional reinforcement, while a redesigned boss shape and boom foot improve stability. Kobelco | www.kobelco-usa.com The Doosan DX530LC-5 crawler excavator is said to offer perfor- mance, operator-focused comfort, improved fuel efficiency, reliabil- ity, and durability. It has an operating weight of 116,576 pounds and a maximum digging depth of 24 feet. Operators can choose from four work modes to maximize efficiency and fuel economy. Helping improve productivity is an intelligent floating boom. Op- tions include a straight travel pedal, two-way auxiliary hydraulic pedal, and diesel-powered coolant heater for cold starts. To meet Tier 4 emission standards, the 373-net-horsepower excavator in- cludes a mass airflow sensor and exhaust brake to the engine. To help save fuel, an added auto-shutdown, with an idler time from 3 to 60 minutes, was added to help owners save fuel during non- working conditions. Doosan Construction Equipment | www.doosanequipment.com Performance with operator-focused comfort Production-class machine is Tier 4 Final Hydraulic regen system boosts digging force