Better Roads Digital Magazine
Issue link: https://read.dmtmag.com/i/85916
continued Deas, who owns other brands in smaller size classes, is emblematic of two market trends cited by exca- vator manufacturers: from the 20-metric-ton class – the traditional "sweet spot" – up to the 30-metric-ton class, for which some limited anecdotal evidence exists. 30 metric tons and up in various applications beyond traditional bucket use. "This size of machine is now be- Roundup JS330LC different tools in." Volvo's newest Tier 4 Interim- compliant model, the 30-metric-ton- Everything's big in Texas 2011 % Increase - 33+ to 50-mt excavators Texas Indiana Alabama 2010 Units 2011 Units Among Equipment World readers in some states, there were notable increases in 2011 from 2010 in fi nanced sales of new and used 33- to 50-metric ton excavators. Source: EDA sophisticated" auxiliary hydraulics system, complemented by the PC490LC-10 20 different tools, says Escalante. Traditionally, to work a mower or excavator this size would need to acquire – at a cost of about $8,000 dedicated fl ow required, he says. "All the operator has to do is just cost-effective." standards, now required for exca- vators in the 30- to 50-metric-ton to a choice for manufacturers. The culation (EGR) approach entails CX350C JCB New versions of established model sizes are expanding JCB's 30- to 50-metric-ton exca- vator product line. In addition to the stan- dard long-carriage (LC) and extra-duty (XD), the 72,816-pound JS330 is now available in a long-reach (LR) confi guration with a longer boom and dipper, particularly suited for waterways maintenance. The 82,829-pound JS360, along with the standard LC, comes in an XD version with a reinforced dipper and bucket linkage, extra plating, engine pre- cleaner and over-cab FOPS guard for rugged demolition and land-clearing applications. On both conventional JS and reduced-tail- swing JZ full-size excavators, JCB uses a single-piece, steel X-frame undercarriage with greased-for-life Berco track components. Turbocharged Isuzu engines, dishing out 271 horsepower for both the JC330 and JC360, have automatic warm-up and overheat protection systems. Auto-shift transmissions move to and from high, mid and low gears to match engine output with precise machine movement. For product info: visit: jcbamericas.com 33c May 2012 Better Roads variable-geometry turbocharger and exhaust gas recirculation valve to help achieve Tier 4 Interim emissions standards on the Dash-10 versions of 30- to 50-metric-ton excavators, introduced in 2011. The Komatsu diesel par- ticulate fi lter has an integrated design that does not interfere with daily operation, keep- ing the operator aware of its status. Komatsu designed all major components – including engines, hydraulic pumps and valves – on the 68,234-pound PC290LC-10, 79,930-pound PC360LC-10, 89,071-pound PC390LC-10 and 106,880-pound PC490LC-10. The resulting integrated design includes a closed center load-sensing hydraulic system that uses variable speed matching to adjust engine speed based on pump output. The engine's electronic control system manages air fl ow rate, fuel injection, combustion parameters and aftertreatment functions. For product info, visit: komatsuamerica.com Komatsu Komatsu developed a hydraulically-actuated Case With its new C Series crawler excavators, including the 80,000-pound CX350C intro- duced last year, Case says it increased fuel effi ciency from the B Series by up to 10 per- cent – particularly noteworthy considering the fuel effi ciency on the B Series excavators earned Japan's Energy Conservation Award. The Case intelligent hydraulic system tech- nology reduces fuel consumption via such features as boom economy, auto economy, swing relief and spool spoke control. At a 5-percent uptick in cycle times, C Series exca- vators can load 10 more trucks per shift, says Case. The Tier 4 Interim-certifi ed cooled EGR CX350C, rated at 266 net horsepower, has a rearview camera feeding video to an LED in- cab monitor. SmartFit teeth are now factory- installed as a standard feature on Case buckets purchased with large- and mid-range excavators, including the 103,800-pound CX470C just about to hit the market. For product info, visit: casece.com 50 100 150 200 250 300