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Caterpillar’s 90-metric-ton (198,000-lb) Cat 390D L Hydraulic Excavator, which replaces the 385C L, incorporates a refined design that provides greater hydraulic power, stronger structural components, added safety and convenience features, plus improved serviceability. It can take on the toughest jobs in a range of aggregates, coal and hard rock mining applications. Powering the new 390D L is the 18,1-liter (1,104 in³) Cat C18 ACERT diesel engine, Tier III compliant and rated at 523 net horsepower (390 kW). The C18 features advanced electronic control, precise fuel delivery and refined air management for optimum performance, fuel efficiency and emissions control. The torque characteristics of the engine allow full power at maximum rpm, resulting in efficient hydraulic-pump operation and positive hydraulic response.