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The Cat 320D L hydraulic excavator uses a Cat C6.4 ACERT engine with 148-net horsepower. The cooling fan is directly driven from the engine, and an electrically controlled viscous clutch fan is available as an attachment to reduce fan noise. It has a 35,000 kPa system pressure. The pilot pump is independent from the main pumps and controls the front linkage, swing and travel operations. The front reach configuration reaches 50 feet.