April 1, 2008
Your complete guide to new and updated equipment and supplies in the aggregates industry.
by Kirk Landers, Editorial Director
Mid-size rinser debuts
Powerscreen unveiled its new Chieftain 1700 Rinser at last month’s ConExpo-Con/Agg show. The mid-sized, track-mobile unit is available with two or three decks and complements the Chieftain 1400 and 2100X models. Powerscreen, a Terex company, says the unit is suitable for sand and gravel, crushed materials, slag and recycled products, among other applications, and produces four clean products for sale and use. The fully mobile washing screen includes a feed hopper with reject grid, feed conveyor, washing screen, and fully enclosed power unit.
Refined 2.5-yard loader
Case Construction Equipment unveiled the E-series version of its 2.5-cubic-yard 521E wheel loader at the World of Concrete in January. The machine features a higher-horsepower Tier 3 engine, a redesigned cab with more visibility and comfort, and improved maintenance access features. The fully electronic 135-horsepower engine brings with it the option of three selectable power modes — maximum, standard, or economy. Like other E-series loaders, the 521E also has selectable Auto Idle, which automatically reduces engine idle speeds after 30 seconds of idling to save fuel.
Closed circuit crushing and screening
Terex Pegson rolled out its new 1000SR mobile plant at ConExpo-Con/Agg. It combines the company’s Maxtrak mobile cone crushing plant with a double-deck sizing screen and a re-circulating system, all on a single, track-mounted chassis. Terex Pegson recommends the unit for secondary and tertiary applications in quarrying, where high-quality, low-flake, single-size aggregate and “all-in” sub-base materials are required.
Safer and easier to use
Davey Bickford says its new, third-generation Daveytronic III is more reliable, safer, and easier to use thanks to a new detonator. It has wireless capabilities and new software that is said to reduce programming and diagnostic time on the bench. The new detonator has an electronic integrated delay module encased in a high-pressure resistant resin for better protection from dynamic shock.
Larger solid-body breaker
Atlas Copco has extended its line of solid-body hydraulic breakers with the rollout of the SB 552. The 1,149-pound attachment is designed for carriers in the 9 to 15 metric ton class. It requires an oil flow of 17.2 to 30.4 gallons per minute at a pressure of 1,450 to 2,180 psi. It delivers up to 1,080 blows per minute. Its one-piece design contains all integral parts in the same iron alloy casting for strength, and the unit is said to have fewer moving parts than competing units.
New big-bore engines
International has developed its own, completely new line of big bore diesel engines, the MaxxForce 11 and MaxxForce 13. The new engines are available as options on International trucks — there will ultimately be six models, ranging from 330 to 474 horsepower and 1,250 to 1,700 pounds-feet of torque. Developed with the company’s European partner, MAN, the engines are the first to use compacted-graphite iron blocks and the first big-bore engines in North America to use a high-pressure, common rail fuel system, according to International. Also new is use of twin-series turbochargers, a primary turbo for take-off at low engine speeds, and a secondary turbo to maintain peak power at high engine speeds and during grade changes.
Electronically controlled hydrostatic drive
Case has unveiled its first L Series crawler dozer, the 144-horsepower 1650L. It features a Tier 3 engine, a more sophisticated hydrostatic drive, and an improved undercarriage. The hydrostatic drive features an electronically controlled, variable displacement, dual path hydrostatic transmission with 10 speed settings. The undercarriage features eight rollers with a hunting tooth sprocket for precise grading. The machine also features a new cab, low-effort blade control, and high-performance hydraulics for faster, more powerful and more precise blade operation.
New excavators debuted last month
Hitachi introduced two new excavators at last month’s ConExpo-Con/Agg show, including the reduced tail-swing Zaxis 135US-3 and the new wheeled excavator, the Zaxis 220W-3. Both machines feature Tier 3 engines and the company’s new CRES II cab, which is bigger and has more glass area that previous cabs. Both are more powerful than the models they replace and travel at faster speeds. The Zaxis 135US-3 also has faster arm roll-in and boom lower/arm movement due to hydraulic refinements, and the Zaxis 220W-3 has more stability for moving Jersey barriers without outriggers.
Baldor Electric Co. says its new Dodge MagnaGear XTR is designed for tough, high-torque conveying applications. Available in parallel shaft or right angle configurations, it is offered in torque capacities up to 920,000 pounds-inch. Baldor says its modular design allows for multiple mounting configurations and it can be used with a variety of soft start mechanisms.
Purpose-built ready-mix loader
Caterpillar unveiled a purpose-built 928Hz Ready Mix wheel loader at January’s World of Concrete show. The unit is specially equipped for high production and reliable operation in ready-mixed concrete plants, asphalt batch plants, and concrete products plants. The machine is based on Cat’s highly maneuverable 928Hz loader equipped with a 3.5-cubic-yard sand and gravel bucket, and balanced by a ready-mixed counterweight package. The larger-than-standard bucket, good balance, and short wheelbase of the small wheel loader deliver high productivity in the limited spaces of concrete and asphalt plants, Cat says. Also included is automatic ride control to cushion the bucket for comfort and reduced spillage and the cab includes air conditioning, exterior mirrors, floodlights, sliding glass windows, and sunscreen and sun visor.
No tail swing, no compromise
Kobelco says its new 17SR Acera zero tails wing compact excavator is an uncompromising producer, thanks to advanced hydraulics and an adjustable track gauge that provides easy maneuverability in tight spaces without sacrificing stability when working. The new “smart” hydraulic system includes three pumps to ensure maximum power for lifting, swinging, and travel, as well as for fine grading.
Superior Tire & Rubber is offering the industry’s first bogie and idler wheel reconditioning program. Customers ship damaged bogie and idler wheels to the company, which has developed a unique process to remove all failed rubber and apply a proprietary, long-lasting polyurethane. Superior says the rebuilt hub has “better-than-OEM worklife standards.”
Caterpillar is now equipping most of its new mining and industrial machines with Equipment Manager and Product Link, the company’s proprietary remote asset management system.
Conduit Covers has created heavy-duty polyethylene bags with flexible tie straps designed to cover and protect the ends of open hoses, tubes, lines, pipes, and fittings during field repairs, storage, and other applications.
Howard Leight has introduced Clarity multiple- use earplugs, which are said to block hazardous noise while allowing voice and signal frequencies to be heard more naturally.
Chevron’s Delo Brand is now offering a nitrite-free extended life coolant to meet engine requirements from Detroit Diesel.