Komatsu’s new GD655-6 motor grader, like a premium pickup truck, comes with just about every bell and whistle you could ask for. Where to start? The dual mode transmission combines a torque converter with a direct-drive lockup clutch. In lockup you get high travel speeds and lower fuel use. The torque converter improves tractive effort and fine control when blading material at lower speeds. The driveline also delivers on-the-go full power shifting, inching capabilities and automatic shifting in the higher ranges. No-stall engine Komatsu’s Tier 4 Final engine is programmed to prevent stalling by automatically disengaging the lockup clutch and switching to torque converter mode when you are handling heavy loads. The company claims the new grader gets 5 percent better fuel efficiency in power mode and 15 percent in economy mode compared to the previous model. To keep negligent operators from running up the fuel bill, an auto-idle shut down comes standard. Extra hydraulic valves The hydraulic system uses 10 control valves, giving you two additional valves with linkage for additional attachments. The GD655-6 is also set up for ripper and grade control installations if you choose those options. According to the company, with a wheelbase of 21 feet, 4 inches, the new grader is the industry’s longest in its class, yet it retains a turning radius of 24 feet, 3 inches. Monitor everything In the cab, a 7-inch LCD monitor colombia, bogota allows you to modify settings such as the auto idle feature or the reversing hydraulic fan. You can also check operations records such as driving history, fuel and DEF consumption and keep tabs on your diesel particulate filter. The monitor even serves as a learning tool with tips for reducing fuel consumption. A rear-view camera come standard and mounts above the front windshield. Telematics On the digital front, Komatsu’s equipment management monitoring system (EMMS) enables you to monitor, maintain, troubleshoot and repair the grader quickly. The company’s telematics system, Komtrax, allows you to keep up with the machine’s fuel levels, operating hours, location and gives you cautions and maintenance alerts via on a website or a smart phone. Additionally, Komtrax now monitors DEF levels, ambient air temperatures and pressures. Maintenance made easy Ground-level fuel and DEF access simplify maintenance. The DEF tank has an external site gauge which prevents overfilling and spillage. The GD655-6 also comes with complimentary scheduled maintenance for the first three years or 2,000 hours and two DPF exchanges in the first five years. – See more at: http://www.equipmentworld.com/high-speed-or-just-inching-along-komatsus-new-gd655-6-motor-grader-offers-wealth-of-new-features/#sthash.k4WgNyUK.dpuf

Cat 352F combines fuel-efficiency and powerful hydraulics with operator comfort and safety

THE new Cat 352F hydraulic excavator featuring a variable-gauge undercarriage has a maximum operating weight 53.3 tonnes and is powered by a 317kW Cat C13 ACERT engine that meets EU Stage IV emission standards.

The 352F’s pilot-operated hydraulic system, with a maximum flow of 770 litres/min, is designed to deliver powerful digging and lifting forces, as well as ample power for hydro-mechanical work tools.

The 352F features heavy-duty main structures for long-term durability, a spacious operator’s station, simple routine maintenance, and fuel-saving systems that reduce operating costs in a range of applications, including quarrying, road building and heavy earthmoving.

Fuel-saving features include three power modes – High, Standard and Economy – that allow the operator to select an engine operating speed to match the application. In addition, an automatic speed control adjusts engine rev/min to match the machine’s operating load, and an idle shutdown system stops the engine after a pre-set idling interval. These systems not only save fuel, but also reduce emissions and extend service intervals.

The 352F’s hydraulic system is designed with major components in close proximity – an arrangement that allows shorter connecting tubes and hoses to reduce frictional losses and pressure reductions, resulting in reduced loading on the system for added fuel savings. The main control valve is designed to respond proportionally to control-lever movement for precise controllability of hydraulic functions.

In addition, electrically controlled regeneration circuits for the boom and stick cylinders reduce the volume of oil required from the main pumps, thus reducing engine load, saving fuel and further enhancing controllability.

Available couplers and auxiliary hydraulic circuits expand the capability of the 352F by equipping it to handle an extensive range of Cat work tools, including buckets, hammers, grapples, shears, multi-processors, and rippers.

The 352F’s boom and stick options are fabricated from premium steel plate and use high-strength castings and forgings in high-stress areas.

Fitted with the heavy-duty 6.9m reach boom and 3.5m stick, the 352F has a maximum digging depth of 7,510mm. Alternatively, a mass-excavation boom can be paired with either of two sticks for high production in large-scale earthmoving and heavy-material applications.

Heavy-duty construction of the 352F’s upper frame, carbody and track frames ensures structural durability in the most severe applications, and the upper frame also incorporates special mountings to support the heavy-duty cab.

The variable-gauge undercarriage – featuring massive track bogota colombia roller frames and high tensile strength steel components – provides both a wide, stable working base and a reduced shipping width. The track chains are grease lubricated to reduce undercarriage noise and internal pin-and bushing wear.

The 352F’s spacious and comfortable cab features a pressurization system that provides positive, filtered airflow to resist dust intrusion. Low-effort joystick controllers are mounted in height-adjustable consoles that complement adjustable armrests and a fully adjustable, high-back seat.

The cab’s large glass areas enhance visibility, while a large, easy-to-navigate, high-resolution LCD monitor provides critical operating information, including alerts for filter-change interva

Doosan Construction Equipment ha presentado la nueva excavadora de ruedas DX190W-3 de 19 t conforme con la fase IIIB. Al igual que las demás excavadoras, cargadoras de ruedas y dúmperes articulados Doosan de nueva generación que se han lanzado en los dos últimos años, el modelo DX190W-3 no se limita a cumplir la normativa más reciente sobre emisiones, sino que establece un nuevo referente en el sector al ofrecer mayor potencia de excavación, mayor capacidad de elevación y ciclos de trabajo más rápidos con un menor consumo de combustible a fin de reducir los costes y proteger el medio ambiente.

Aumento del rendimiento

Con pesos operativos que oscilan entre 18,4 y 20,3 toneladas, la excavadora de ruedas Doosan DX190W-3 es una máquina que pertenece a la clase de 18-19 t. Lleva motor diésel Doosan DL06KB de 6 cilindros y conducto común conforme con la fase IIIB, dotado de turbocompresor de descarga con intercambiador de calor de serie y que desarrolla 129,4 kW (174 CV) a 1900 RPM (SAE J1349), por lo que ofrece más potencia que otras máquinas de esta clase. Esto se combina con una capacidad hidráulica que produce las mayores fuerzas en el balancín y el cucharón y la mayor fuerza de tracción del mercado.

La nueva excavadora de ruedas DX190W-3 proporciona un rendimiento mucho mayor que el modelo de fase IIIA. Reduce hasta el 12% en el consumo de combustible, dependiendo del modo seleccionado y del trabajo que se haga. El nuevo indicador ECO del panel de control permite controlar en tiempo real el consumo de combustible y el porcentaje de carga del motor para orientar al operador en la selección del modo de funcionamiento con menor consumo de combustible. Hay dos nuevos modos de funcionamiento (P+ para más potencia y L para elevación) que mejoran el control y la eficiencia. El modo de elevación tiene como fin facilitar el manejo de objetos y materiales pesados en aplicaciones de construcción, lo cual resulta especialmente útil a la hora de trabajar en espacios estrechos y reducidos.