Tag Archive for 'Mining'

Sidewall Protection for OTR Tires Keeps Concrete Recycling Operations Running

At concrete and aggregate recycling sites, recycled aggregate is produced by crushing concrete and asphalt to reuse the aggregate in the construction industry as a base for roads or building foundations.  

To keep operations running site managers rely on loaders to push large jagged chunks of torn up sidewalk, roadway, or building materials – which can have steel rebar sticking out – to the crushing line to reduce its size.

Even though OTR tires for heavy equipment are specially designed for harsh environments, the risk for damage is still high.  One of the most common failure points is the tire’s sidewall. 

Without added protection, the jagged edges and steel rebar in piles of debris can put loaders’ OTR tires at severe risk of sidewall puncture and abrasion, particularly the front tires closest to myriad sharp, abrading objects.

Fortunately, for operations managers, a new breed of tough, durable sidewall protection for OTR tires is designed to stop loader sidewall punctures and abrasion while significantly extending tire life to keep aggregate recycling operations reliably running.

Minimizing Costly Sidewall Puncture

Research by the Mechanical Engineering Department at the University of Alberta in 2011 on the detection of faults on off-road haul truck tires identified five tire failure areas: tire tread, shoulder, sidewall, bead, and liner.  The study cited research by Syncrude Canada Ltd. that examined the causes for off-road tire failure from 2005-2010.  Sidewall cuts accounted for approximately 18 percent of all faults, sidewall separation 10 percent, and sidewall impact over 5 percent. 

When the sidewall is damaged in loaders, typically by a puncture, the vehicles are not safe to operate and the OTR tires are expensive to replace. 

Repairing a damaged sidewall takes valuable time to send a tire out for repair, and the repair may not be successful.  An aggregate recycling operator could face a sidelined loader, expensive tire replacement, and reduced production or even significant operational downtime.  

With shortages for certain tire sizes more common recently, it could take days or longer to get a replacement tire installed at a repair facility, and then get the loader back to work.

An Innovative Sidewall Shield

As a solution, an innovative new type of sidewall protection device is entering the market for valuable OTR tires.  Purpose-built for use on heavy equipment at aggregate recycling sites, operators can bolt on a polyurethane sidewall shield to prevent the sidewalls from getting punctured during operation.

A Michigan-based firm, Argonics, which specializes in high-performance, polyurethane-based elastomers and is one of the largest producers of impact, wear-resistant and customizable urethane products, has developed this sidewall protection.  Their sidewall protector uses a proprietary urethane formulation called Kryptane, which was engineered for extreme wear conditions involving abrasion, sliding, or impact.

The special properties of urethane make it an excellent material for sidewall protection.  This tough, elastic material excels in preventing the penetration of sharp objects as well as deflecting them.  It will change shape under impact and then return to its original shape afterward.  Urethane also offers maximum abrasion resistance, which is ideal for situations where severe wear is a problem.  

For these reasons, urethane is already being used at mining, heavy construction, and aggregate recycling sites across North America.

The idea for applying the special properties of urethane for off-road sidewall tire protection came from Perry Fell, Territory Manager at Luff Industries, a Canadian distributor of Argonics.  He thought Argonics’ expertise in high performance polyurethane elastomers would be well suited to an OTR application, and proposed the original design.

Design Benefits

The sidewall protector comprises eight integrated segments that, together with a specially designed ring, use 32 bolts to apply to a wheel.  The entire sidewall protector can be installed in about 15 minutes once the special flange has been installed by certified personnel.  

The benefit of this design is that it allows easy replacement of just the segment of the protector that is damaged, if any, not the entire shield.  Virtually no maintenance is needed other than to retorque the bolts after 15 to 20 hours of use – much like when installing new tires on a car. 

The urethane-based sidewall protector has been tested at aggregate recycling sites in Toronto, Canada and Dallas, Texas.  It has been installed on the front tires of Caterpillar 980 loaders at these sites.  

“The sidewall protector has been performing very well,” said Fell. “We’ve had no tire punctures or sidewall issues since installing the protectors.” 

Bob Welker, International Sales and Director of Marketing at Argonics, said, “We’ve been able to refine the sidewall protector design based on the extended testing. There have really only been minor changes needed for things like increasing the size of the bolts.” 

According to Welker, the patent-pending urethane sidewall protector is in its fourth generation.  Currently the design is based on a 25-inch wheel diameter used by loaders such as the Caterpillar 980.  The company is planning sidewall protectors for 33-inch and 45-inch wheel diameters next. 

This feature appeared in the December 2019 issues of the ACP Magazines:

California Builder & Engineer, Construction, Construction Digest, Construction News, Constructioneer, Dixie Contractor, Michigan Contractor & Builder, Midwest Contractor, New England Construction, Pacific Builder & Engineer, Rocky Mountain Construction, Texas Contractor, Western Builder

Caterpillar Announces Officer Retirement

Caterpillar Inc. (NYSE: CAT) announced today that E. Jean Savage, currently vice president of the Surface Mining & Technology Division, has elected to retire.

Earlier today, Trinity Industries, Inc. announced that Savage, a member of the company’s Board of Directors, has been appointed Chief Executive Officer and President, effective February 17, 2020.

“We thank Jean for her 17 years of service to Caterpillar,” said Denise Johnson, Resource Industries group president. “Jean has been instrumental in delivering Caterpillar mining products and services that are focused on accelerating customer benefits in safety and productivity. We appreciate all of her contributions and wish her well in her new role at Trinity Industries.”

Savage joined Caterpillar in 2002 and held numerous leadership roles in Caterpillar’s Progress Rail division, before being named vice president of Advanced Components and Systems division in 2014. Savage went on to lead the Innovation and Technology division before being named vice president of Surface Mining and Technology division in 2017.

Prior to joining Caterpillar, Savage worked for 14 years at Parker Hannifin Corporation, a leader in motion and control technologies and systems, where she held a variety of manufacturing and engineering positions. In addition, Savage served nine years in the Army Reserves as a military intelligence officer.

Savage graduated with a bachelor’s degree in electrical and computer engineering from the University of Cincinnati and a master’s degree in engineering management from the University of Dayton.

Savage’s retirement is effective February 14, 2020. A replacement will be named at a later date.

About Caterpillar:
For more than 90 years, Caterpillar Inc. has been making sustainable progress possible and driving positive change on every continent. Customers turn to Caterpillar to help them develop infrastructure, energy and natural resource assets. With 2018 sales and revenues of $54.722 billion, Caterpillar is the world’s leading manufacturer of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives. The company principally operates through its three primary segments – Construction Industries, Resource Industries and Energy & Transportation – and also provides financing and related services through its Financial Products segment. For more information, visit caterpillar.com.

AEM Reminds Industry That Hall of Fame Nominations Due By June 12, 2019

Don’t Delay: Submit AEM Hall of Fame Nominations by June 12

TheAssociation of Equipment Manufacturers (AEM) Hall of Fame is seeking outstanding equipment industry leaders who have made meaningful advancements to the industry’s growth and success.

Nominate a deserving individual by June 12 to be considered for 2019 AEM Hall of Fame induction.

Details and the easy-to-fill-out nomination form are online at www.aem.org/HallofFame.

The AEM Hall of Fame celebrates those who have changed the trajectory of the off-road equipment industry with their vision and creativity.

Anyone (living or deceased) who have made noteworthy and specific industry contributions is eligible for induction.

Candidates are evaluated by an independent panel of judges, and inductees are announced and celebrated at AEM’s Annual Conference of Member Companies.

The AEM Hall of Fame highlights the off-road equipment manufacturing industry’s legacy of progress to promote greater understanding and appreciation for its contributions to global economic and social prosperity – and to inspire the next generation of industry leaders, innovators, and visionaries.

Individually and collectively, AEM Hall of Fame inductees represents some of the best, brightest and most influential minds in the history of the off-road equipment industry.

For more information, please contact AEM’s Pat Monroe (pmonroe@aem.org, tel: 414-298-4123).

About AEM – AEM is the North American-based international trade group representing off-road equipment manufacturers and suppliers, with more than 1,000 companies and more than 200 product lines in the agriculture and construction-related industry sectors worldwide. The equipment manufacturing industry supports 1.3 million jobs in the U.S., and 149,000 more in Canada. Equipment manufacturers also contribute $188 billion combined to the U.S. and Canadian economies. AEM is celebrating its 125th anniversary in 2019. Learn more about AEM at https://www.aem.org/.

Terex Trucks has its sights set on North American expansion

Terex Trucks, the Scottish articulated hauler manufacturer, has big plans for North America. The company wants to expand its already 35-strong North American dealer network, bringing its TA300 and TA400 machines to even more customers throughout the region.

 With the way things are going, America – the ‘land of opportunity’ – will soon become known as the ‘land of construction’. Billions of dollars have been ploughed into projects to create new buildings, roads, and pipelines throughout the country. According to Dodge Data & Analytics, US construction projects started this year will carry a combined value of $808 billion (£612 billion GBP). Also, at the moment, oil pipeline companies are doing particularly well because major renovation work is underway in and around British Columbia in Canada.

Given the rising demand for robust construction equipment, Terex Trucks has decided to focus more attention on the North American market. “Historically, North America has always been a strong market for us,” says Robert Franklin, Sales & Marketing Director, Americas. “A significant proportion of the machines we make at our Motherwell facility are distributed to customers across this region. As a company, we want to grow our business in North America, reaching new customers and working with our dealer network to deliver an even better service.”

Market trends

“Our TA300 articulated hauler does especially well in North America,” says Robert. “In fact, keeping up with demand is a challenge because it’s just thatpopular! Towards the end of last year, the TA300 underwent an upgrade and it now includes the new EP320 transmission. It comes with two additional forward gears – eight in total – as well as four reverse gears. This helps to ensure smoother gear shifting and thereby superior operator comfort. In addition to this, the TA300 now delivers a 5% improvement in fuel efficiency, as well as enhanced performance, productivity and operator comfort. We’ve already sold several of these machines in North America. The demand for the TA400 has picked up a lot recently too, owing to the various large-scale infrastructure projects happening throughout the region.”

Today, Terex Trucks has 35 dealers in North America, but the company is keen to sign more in specific regions. “Colorado, Louisiana and Alabama are target areas for Terex Trucks, as is Ontario in Canada,” says Robert. “The dealers we already have in place are exceptional. Their industry experience, together with their technical expertise and willingness to invest in training, means that customer satisfaction is consistently high. Over the coming months and years, we want to expand our footprint and reach even more customers.”

Customer feedback

“Based on customer feedback, fuel efficiency is a big part of the reason why customers choose to go with Terex Trucks over our competitors,” explains Robert. Both the TA300 and TA400 are extremely fuel efficient and meet the requirements of North American emissions legislation without a diesel particulate filter (DPF). This is achieved via the latest generation selective catalytic reduction (SCR), combined with exhaust gas regeneration (EGR) technology and a variable geometry turbo (VGT).

Key features

Beyond fuel efficiency, there are many other benefits that come with Terex Trucks articulated haulers. The TA300, designed to deliver in even the most challenging conditions, is a firm favorite among customers working in quarries and on infrastructure developments. Powered by a Scania DC9 engine, this articulated hauler has a maximum payload of 30.9 tons (28 tonnes), maximum torque of 1309 lbf ft (1880 Nm) and can achieve gross power of 370 hp (276 kW). The TA400, Terex Trucks’ largest articulated hauler, is the perfect fit for customers working on large-scale construction projects and mines. With a maximum payload of 41.9 tons (38 tonnes) and a heaped capacity of 30.3 yd3(23.3 m3), it can put in a serious performance. Both machines also come with hydrostatic power steering and all hydraulic braking systems, helping to ensure a safe and comfortable ride.

CAT REDESIGNED G SERIES CARRIES ON 777 LEGACY WITH NEW TECHNOLOGY FOR HIGH PRODUCTION, FUEL EFFICIENCY, AND OPERATOR AMENITIES

The new Cat® 777G off-highway truck builds on the legacy of performance, reliability, and long-term durability established by 777 models since 1977, both in mining and large earthmoving applications.

Rated payload for the new 777G is 98.4 tons (89.4 MT), with a standard-body volume (SAE 2:1) of 83.8 cubic yards (64.1 m3). The design of the 777G, which replaces the 777F, focuses on fuel efficiency, enhanced visibility, and operator comfort, convenience, and safety.

Conserving fuel

The new 777G’s Cat C32 ACERT™ engine meets US EPA Tier 4 Final as well as EU Stage V emission standards and is available in configurations to meet emission standards of less regulated (LRC) countries. The engine delivers 1,025 gross horsepower (765 kW) and incorporates a number of fuel-conservation features.

Auto Neutral Idle allows the 777G transmission to intermittently shift to neutral when the truck is idling in a forward gear to avoid stalling the torque converter and increasing engine speed. Engine Idle Shutdown, an operator-selected feature, stops the engine when the truck idles in park for more than a preset interval. Speed Limiting provides an alternative to gear-limiting the 777G by allowing the truck to travel at a more fuel-efficient engine speed and in a more efficient transmission gear. Advanced Productivity Electronic Control Strategy (APECS) transmission controls boost fuel efficiency by maintaining momentum and speed on uphill grades during shifts.

In addition, the 777G has two operating modes, Standard Economy and Adaptive Economy. Standard Economy saves fuel by reducing engine power by 0.5 to 15 percent, based on the fleet and economic conditions at a particular site. Adaptive Economy requires a production baseline for the site using the Advisor display, and then, as the truck travels the haul cycle, the system automatically evaluates the power rating needed to meet baseline requirements. Full power is applied when needed, and reduced power is applied when appropriate. The efficiency of the 777G’s performance is further enhanced by 7 percent more engine torque and an increase in top speed.

Operator environment and safety

The 777G features a redesigned cab, easier to enter and exit, and having a new operator seat on the left and a more comfortable trainer seat on the right. A new console with an integrated hoist-and-shift lever enhances convenience, as does more interior space for storage. The truck’s design also emphasizes improved visibility, to both the work area and instrumentation, and overall visibility is further enhanced with an optional object-detection system. Convenience items include a powered left window, automatic temperature control, throttle lock for long uphill grades, and reduced interior sound (by 50 percent, compared with predecessor models)

Operator safety is a primary design factor for the 777G, with roll-over and falling-object protective structures integrated into the cab’s design. Laminated glass is used in the front and left windows, and emergency egress is provided via a right-side hinged window. A ground-level engine-shutdown switch is readily accessible, and a secondary steering system is provided in the event of the primary steering system failure.

Powerful wet-disc brakes are used at all four corners and provide parking brake and slope-holding capability. Brake life can be extended with an available engine brake, and a brake-wear indicator facilitates timely maintenance. Automatic retarding adds to positive control on downhill grades, and a new steering-sensitive traction-control system assists when ground conditions deteriorate

Structures and bodies

The 777G’s major structures are designed for long-term durability in harsh operating conditions, engineered to endure through more than one power-train life cycle. Box-section castings are used strategically in high-stress areas, a new front frame design increases the approach angle on ramps and grades, and a heavy-duty rear axle housing axle allows increased lubrication and filtration of critical components.

The Dual Slope Body, designed for optimum material retention on haul roads with steep slopes, carries material low and centered for stability. Heaped capacity is 78.8 cubic yards (60.2 m3) in its standard configuration. Two side-board sizes increase capacity for lighter weight materials. The X body has a flat floor and facilitates metering material into a crusher; standard heaped capacity is 83.8 cubic yards (64.1 m3). Rubber or steel liners are available for both bodies. Light-material bodies provide capacities to 165 cubic yards (126 m3).

Serviceability

Tire life can be extended for the 777G with the TKPH/TMPH feature that calculates tire loading, and a mud-protection package is available to help keep power train components clean. Hydraulic-oil filter life is 1,000 hours under normal conditions. Fluid-fill and extraction points are grouped for convenience, and all checkpoints are located at ground level and lighted for night access. A master disconnect switch, engine lock-out switch, and hydraulic lockout switch provide a convenient method when servicing the 777G.

 

777G SPECIFICATIONS

Engine Cat C32 ACERT
Net Power (SAE1349) 916 hp (683 kW)
Operating weight, w/std. body 363,000 lb. (164 650 kg)
Weight distribution, loaded, 33F/67R
Transmission speeds 7F/1R
Max. travel speed 41.7 mph (67.1 km/h)