CASE Construction Equipment has introduced two new crawler excavators to its D Series lineup: the CX490D and CX500D. These new models are designed for heavy excavation work and replace the company’s previous 47-metric ton excavator the CX470C. Each model is designed to provide significant operational gains, including cycle times up to 10 percent faster, improved responsiveness and multifunctional controls, and greater fuel efficiency. An electronically controlled hydraulic pump and larger control and solenoid valves boost breakout forces, increase lifting strength and improve responsiveness.
The CX490D features 362 horsepower, weighs 109,300 pounds, and offers a bucket digging force of 55,500 – 60,700 foot pounds. The CX500D also features 362 horsepower, but weighs 111,800 pounds and offers a bucket digging force of 64,500 – 70,400 foot pounds.
The CX500D—the largest Tier 4 Final excavator in the D Series—is a dedicated model for mass excavation. With a special heavy-duty attachment coupler, larger bucket cylinders and optimized kinematics, the CX500D works with larger buckets than the CX490D.
Both models are available with an optional hydraulic counterweight removal device for improved on-site safety and efficiency during transportation.
The CASE CX490D and CX500D excavators meet Tier 4 Final emissions standards through a combination of selective catalytic reduction (SCR) and diesel oxidation catalyst (DOC) technologies, which helps maximize uptime and performance with minimal maintenance. There is no diesel particulate filter (DPF), no DPF regeneration or associated lifetime service costs.
Faster cycle times are achieved through a new electronically controlled pump, a larger control valve and multiple sensors. These features combine with the CASE Intelligent Hydraulic System and its four integrated control systems to make the best use of the machine’s hydraulic power and momentum.
The four systems that make up the CASE Intelligent Hydraulic System are: Boom Economy Control (BEC), which reduces RPMs by using gravity during boom down and swing; Auto Economy Control (AEC), which lowers RPMs during idle and automatically shuts down the engine after a preset idle time; Swing Relief Control (SWC), which reduces hydraulic power at the swing start; and Spool Stroke Control (SSC), which adjusts hydraulic pressure during digs. Using improvements to the Spool Stroke Control system, the CX490D and CX500D excavators re-use hydraulic fluid whenever possible to automatically increase cycle times and efficiency.
The CX490D and CX500D excavators also provide the operator with three working modes – Speed Priority, Heavy and Automatic – that help the machine conserve energy and exert only as much power as needed to complete the job at hand.
The arm and boom of each new excavator have been built for greater durability and to support the added power of the machine. The undercarriage is built with thicker steel and a new single-slope design that reduces dirt accumulation and simplifies the cleaning process.
CASE D Series excavators now offer more standard features than any previous CASE excavator. This includes Free Swing for improved craning, laying or lifting of offset loads; oil sample ports for quick sampling of engine and hydraulic oils; and an easy pattern selector for the operator’s preference of ISO or SAE controls. Each D Series excavator features a fully adjustable operator station anchored by a standard heated air-ride seat and joystick controls.
Each machine is available with a new (optional) LED working light package that provides illumination more than three-times brighter than halogen, allowing contractors to work around the clock. The LED package includes six LED lights (two front, two rear and one on each side) and a side-view camera.