Two new tracked Cats

Caterpillar has introduced two new tracked excavators to the European market in the form of the 75 tonne 374F and the 92 tonne 390F that replace their D series predecessors. The new machines are powered by Cat’s Stage IV compliant 352 kW (472 hp) C15 and 391 kW (525 hp) C18 diesels respectively that, according to the company, deliver a 10% reduction in fuel consumption compared to the previous models. Both feature two power modes – standard or economy – to allow the operator to select engine running speed to suit the application, leading to further fuel savings.

In addition, an on-demand-power system adjusts engine speed to match the machines operating load and an engine-idle-shutdown system stops the engine after it idles for a pre-set period. These features extend service intervals in addition to reducing fuel consumption.

The new machines have been developed with distinct design criteria in mind,. These include low fuel consumption for minimal operating costs, optimum operator comfort, easy serviceability and class leading productivity. The 374F has a maximum dig depth of 9.5 m (32 ft) while the 390F can dig to 11.8 m (39 ft) and they offer a forward reach of 14.2 m (46.6 ft) and 17.2 m (56.5 ft) respectively.

The hydraulic systems on both has been designed with the major components close together to allow for shorter connection hoses and tubes to reduce frictional losses and pressure reductions. This results in reduced loading on the system for added fuel savings. They feature a new Adaptive Control System valve that electronically manages flows and restrictions to precisely match the hydraulic response to the joystick movements. Again saving fuel, this smoothes hydraulic functions and adds to overall hydraulic efficiency.