A new face drilling rig for narrow tunnels and ... - Advanced Mining
A new face drilling rig for narrow tunnels and ... - Advanced Mining
A new face drilling rig for narrow tunnels and ... - Advanced Mining
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Cat Ca t e r p i l l a r<br />
Issue 04 | 2010<br />
NEWS & REPORTS<br />
CAT® 390D L DELIVERS STRONGER<br />
PERFORMANCE, RUGGED DURABILITY, MORE OPERATOR<br />
AMENITIES AND IMPROVED SERVICEABILITY<br />
THE NEW 90-METRIC-TON CAT® 390D L HYDRAULIC EXCAVATOR, WHICH REPLACES<br />
THE 385C L, INCORPORATES A REFINED DESIGN THAT PROVIDES GREATER HYDRAULIC<br />
POWER, STRONGER STRUCTURAL COMPONENTS, ADDED SAFETY AND CONVENIENCE<br />
FEATURES, PLUS IMPROVED SERVICEABILITY. THE NET RESULT IS A MORE PRODUCTIVE,<br />
MORE DURABLE, MORE EFFICIENT MACHINE THAT IS COMFORTABLE TO OPERATE<br />
AND CAN TAKE ON THE TOUGHEST JOBS IN A RANGE OF HEAVY CONSTRUCTION AND<br />
MINING APPLICATIONS.<br />
Engine <strong>and</strong> hydraulics<br />
Powering the <strong>new</strong> 390D L is the 18.1-liter Cat<br />
C18 ACERT® diesel engine, which is EU Stage IIIA<br />
<strong>and</strong> U.S. EPA Tier 3 compliant <strong>and</strong> rated at 523 net<br />
horsepower (390 kW). The C18 features advanced<br />
electronic control, precise fuel delivery <strong>and</strong> refined<br />
air management <strong>for</strong> optimum per<strong>for</strong>mance, fuel<br />
efficiency <strong>and</strong> emissions control. The engine‘s<br />
torque characteristics allow full power at maximum<br />
rpm, resulting in efficient hydraulic pump operation<br />
<strong>and</strong> positive hydraulic response. Refinements in the<br />
crankcase, cylinder heads <strong>and</strong> proprietary MEUI<br />
(Mechanical Electronic Unit Injector) fuel system<br />
provide enhanced per<strong>for</strong>mance <strong>and</strong> durability <strong>for</strong><br />
the C18.<br />
Design enhancements in the 390D L‘s implement<br />
hydraulic system allow the <strong>new</strong> model to deliver<br />
significantly greater digging <strong>and</strong> lifting <strong>for</strong>ces than<br />
its 385C predecessor. Main relief pressure in the <strong>new</strong><br />
model‘s implement circuits has been increased to 35<br />
000 kPa, up nearly 10 percent from that of the 385C. This<br />
increase in operating pressure results in 9% digging<br />
<strong>for</strong>ce increase. Increased breakout <strong>for</strong>ce promotes<br />
faster trenching <strong>and</strong> loading cycles plus stronger<br />
per<strong>for</strong>mance at the quarry <strong>face</strong>. In addition, lifting<br />
capacity over the end is increased by 14 percent with<br />
over-the-side capacity up nearly 14 percent—the result<br />
of stronger hydraulics <strong>and</strong> a heavier counterweight.<br />
www.advanced-mining.com<br />
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