Saturday, May 15, 2010

Hydraulic hammers deliver maximum force

Volvo Construction Equipment

The Volvo HB1400 hydraulic hammer for the EC210CL crawler excavator can break concrete with an impact force of 2,500 pounds per foot. The Volvo HB2400 hydraulic hammer is designed for Volvo EC240CL and larger excavators and can break concrete and bedrock with a maximum impact of 6,000 pounds per foot.
The long, heavy piston matches the diameter and weight of the work tools for maximum transfer of energy from the hammer to the ground material. An integrally top-mounted accumulator guards against pressure peaks and helps the piston keep consistent power. And the pressure-control valve keeps the hammer striking at full force, even if hydraulic pressure from the excavator changes.

Source : heg.baumpub

John Deere Series II ADTs with exclusive onboard weighing system

The four new John Deere Series II Articulated Dump Trucks (ADTs) are rugged six-wheel-drive units that provide powerful traction in demanding conditions. They are designed for maximum productivity, increased uptime and low daily operating costs, particularly in fuel efficiency, with Tier 3-certified engines ranging from 265 to 413 hp.

Onboard weighing systems are standard equipment on these trucks. They give operators overload protection, with mirror-mounted lights that alert the loading operator when the truck is nearing capacity. The payload weight information is also available through JDLink so owners and equipment managers can monitor truck utilization far away from the jobsite.

A fully automatic transmission with an integrated transmission retarder has improved transmission shift performance, allowing quicker acceleration out of the loading area for faster cycle times, along with decreased fuel consumption.
“Because John Deere ADTs already have a significant weight advantage and the lowest ground pressure among the top five ADT manufacturers, Deere trucks burn less fuel, particularly in high time-on-grade applications and poor underfoot conditions,” said John Chesterman, product marketing manager for ADTs, John Deere Construction & Forestry.

The tire pressure monitoring system lets the operator keep track of tire pressure from the seat, eliminating guesswork and time out of the cab. The owner can also monitor tire pressures from his desktop since all of the tire information is available via JDLink.
John Deere D-Series II ADT cabs have been updated with a modern, comfortable and convenient design, with lower sound levels and a premium, heated air suspension seat standard. The Series II ADTs feature push-button start and stop with a standard turbo cool-down timer. To help owners reduce costs, these trucks have programmable auto-shutdown timers to save fuel, reduce noise and minimize engine use at times when the trucks are not doing productive work.

Taking fleet management even further, Series II ADTs come with JDLink Ultimate as standard equipment.
An updated 25-button sealed switch module with integrated transmission and dump body controls makes the units easier to operate and ensures switch durability.

All John Deere ADTs feature fabricated, heavy-duty frames, axle housings and articulation joints for lower truck weights and reliable performance. The ribbed body design increases strength yet contributes to low ground pressure. The structure is also engineered to ensure a best-in-class frontal approach angle. Deere ADTs also have ground level fueling.
The 250D and 350D have dry disc brakes and axles with limited slip differentials, while the 350D and 400D have controlled traction differentials and wet disc brakes standard.
“Building and site prep contractors, quarries, and road builders are going to find Series II ADTs have the fuel efficiency, productivity, durability and reliability to keep them more productive at a lower cost per ton,” said Chesterman.

Source : heg.baumpub

Thursday, May 13, 2010

Concrete paving advances: paving mold and bar inserter

The new GOMACO 5400 series paving mold – introduced at the recent World of Concrete – was designed with a structural integrity that is unmatched in the industry, the company says. It features a new “box” design, 54-inch (1372mm) finishing length and a 0.5-inch (13mm) paving skin. The new paving system has a series of accessories including centre and sidebar insertion systems. It features a spreader plow, independent of the mold, or an optional auger to spread the concrete across the paving width. A newly designed strike-off is now mounted to the paver’s main frame, independent of the mold. The strike-off has a wedge-lock system for easy width changes and hydraulic height and crown adjustment. The new mold also features hydraulic Vertically Hinged Sideplates (VHS), self-contained to the inside of the mold, allowing minimum track clearance.

GOMACO’s IDBI attachment is now available on all new GOMACO pavers. The IDBI attachment is an independent unit providing dowel bar insertion behind a paver to form the transverse joint. No power or hydraulics is needed from the paver’s engine. A CAN cable connects the IDBI’s controls to the controller on the paver and allows the two systems to communicate. The new design features a new IDBI tray that is stronger, more compact and makes width changes easier. New adjustable-height bar extractors allow contractors to quickly and easily change the setup for different bar sizes for insertion requirements. Its new GOMACO G+ control system features the same graphical display as the G22 controller, with easy to learn and easy to understand controls. The IDBI information is presented in full colour, commands are presented in full text, and it is able to operate in multiple languages, by customer’s choice. The IDBI attachment has outriggers to aid in attaching the unit to the paver and also for loading and unloading the unit for transporting. The outriggers can be hydraulically lowered and placed on the ground to support the full weight of the IDBI as it is attached to or detached from the paver.

Source : heg.baumpub

Monday, May 3, 2010

The difference between Gas and Diesel Tractor

Diesel compact tractor is superior to a gasoline garden tractor.

The First, diesel engine doesn't have the parts that normally wear out or give problems. There are no spark plugs, rotors, points, or distributor caps like the garden tractor. There is no carburetor either, that will gum up and be hard to start after being stored for a long period of time. Diesel engines can be stored for long periods of time and still start right up.

Secondly, diesel engines in most tractors are water cooled. This will allow the engine to run at a more consistent and cooler temperature, which will extend the life of the engine. The typical properly maintained diesel engine can run thousands of hours without breaking a sweat - and without having to be rebuilt.

Diesel engines will also make more power. Even though gasoline tractors may be a little quicker to start with, they can't begin to match the power and raw torque that diesel engines offer. Another reason why diesel tractors are better than gas is the available attachments.

Most gasoline tractors are equipped with a belly mower and don't normally have a three point hitch. This will severely limit the type of implements that you can use and also limit the tractors expandability.

Most blades and scoop implements won't work with a gasoline tractor. The drive train will also limit the type of implement you can use with a garden tractor.

The typical gasoline garden tractor is belt driven, while a belt drive won't pull as much load as a diesel powered tractor. You would probably not be able to use a box blade or tiller either with the average gasoline powered tractor.

Source : buildingconstructionequipment

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