Two crawler excavators joined Case Construction Equipment‘s D Series lineup: the CX490D and CX500D. These models are designed for heavy excavation work and replace the CX470C, the company’s previous 47-metric ton excavator. Each model is built 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 company says. Also, D Series models offer more standard features than previous Case excavators, the company says.