Caterpillar | tracked excavator--Caterpillar New Tracked Excavator 390 D L

Caterpillar unveiled latest tracked excavator 390 D L, weighing in at 88,180 kg (193,996 lb) is designed to provide greater hydraulic power, stronger structural components, added safety and convenience features, and improved serviceability over that offered by the 385 C L that it replaces. The new machine conforms to the latest engine emission legislation, with its 523 hp (390 kW) Cat C18 engine compliant to EU Stage IIIA and EPA Tier 3 regulations.

The machine's hydraulic system design features a main relief pressure of 35,000 kPa, which is 10% up on that on the 385C, resulting in increased digging (+9%) and lifting (+14%) forces. This is enhanced by the use of a heavier counterweight. To accommodate the greater forces, thicker reinforcing plates are used at critical locations on the carbody. The 390 D L will initially be available in the EAME region only, but of course it will become available in North America by the end of 2011.

Source: Main Pump