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Caterpillar’s new hydraulic excavators

First publishedin Aggregates Business Europe & International
May June 2014
Caterpillar’s new 374F hydraulic excavator
Caterpillar says the new 374F and 390F hydraulic excavators build on the durability, reliability and performance of the D-Series.

Design criteria included low fluid consumption for minimal operating costs, optimum operator comfort, easy serviceability and productivity.

With respective net power ratings of 352kW and 391kW, the Cat C15 ACERT engine on the 374F and C18 ACERT on the 390F meet EU Stage II/US EPA Tier 2 emissions regulations.

Compared with Stage IIIA engines, the 374F and 390F are more fuel efficient than their D predecessors thanks to a 5% fuel consumption decrease on the 374F and 390F.

Fuel-saving features include two power modes (standard or economy) to allow the operator to select an engine operating speed to match the application. In addition, an on-demand-power system adjusts engine speed to match the operating load, while an engine-idle-shut-down system stops the engine after it idles at a pre-set interval.

“The 374F and 390F hydraulic systems are designed with major components in close proximity, an arrangement that allows shorter connecting tubes and hoses to reduce frictional losses and pressure reductions, resulting in reduced loading on the system for added fuel savings. New for the F Series models is the Cat Adaptive Control System (ACS) valve, which electronically manages flows and restrictions to exactly match hydraulic response to joystick movement. This fuel-saving feature smooth hydraulic functions and adds to overall hydraulic efficiency,” says Caterpillar.

The new models can be equipped with auxiliary hydraulic circuits, allowing the use of powered work tools that can be easily attached with a hydraulically activated coupler.

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