Doosan releases new excavators of higher lifting capacity

Doosan’s DX420LC-3 excavator has a 92,374-pound operating weight, 25-foot, 5-inch max dig depth, 25-foot, 4-inch dump height and 37-foot digging reach.

 

The excavator has a six-cylinder, 362-horsepower water-cooled diesel engine with a high-pressure common-rail design with direct fuel injection, electronic control and four valves per cylinder. The engine uses a cooled exhaust gas recirculation system, diesel oxidation catalyst and diesel particulate filter to reduce nitrogen oxides.

 

A variable geometry turbocharger increases boost pressure at lower engine rpm, and enables the engine to create greater torque for improved machine performance while saving fuel. Improvements include a 14-percent boost in swing torque for easier trench backfilling, and a 4 percent increase in lifting capacity to allow the excavator to lift and place more material per cycle.

 

Bucket digging force has been increased by 3 percent, improving cycle times. The cooling system has been upgraded with two variable-speed fans that enable the operator to control the engine coolant and hydraulic oil cooling systems independently, boosting cooling capacity by 10 to 15 percent.