Cat® 374F and 390F Meet EU Stage IV Emissions Regulations and Deliver Greater Fuel Efficiency and Improved Operator Comfort

For Release in Europe: January 2014
Release Number: 560PR13

The new Cat® 374F and 390F hydraulic excavators, replacing D-Series predecessors, use fuel-efficient Cat ACERT™ engines—the C15 in the 374F and C18 in the 390F—that meet E.U. Stage IV emissions regulations. The new models, building on the durability, reliability, and performance of the D-Series, reflect Cat's F-Series design criteria, which include low fluid consumption for minimal operating costs, optimum operator comfort, easy serviceability, and class-leading productivity. With maximum operating weights of 75,170kg and 92,020kg respectively, the 374F and 390F feature heavy-duty main structures, a choice of front linkages and work tools for optimum versatility, and available grade-control and telematics systems.

With respective net power ratings of 352 kW and 391 kW (ISO 9249) the C15 and C18 engines use a combination of proven emissions-control technologies, including electronic management of fuel-injection/intake-air systems and Caterpillar-designed exhaust after-treatment systems. Emissions control is transparent to the operator and does not affect machine performance.

Compared with Stage IIIA predecessor engines, 374F and 390F are more fuel efficient than their D-series predecessors, thanks to a 10% fuel consumption decrease on 374F, and 390F improved productivity performances.

Two power modes—standard or economy—allow the operator to select an engine operating speed to match the application, resulting in further fuel savings. In addition, an on-demand-power system adjusts engine speed to match the machine's operating load, and an engine-idle-shutdown system stops the engine after it idles a pre-set interval. These systems not only save fuel and reduce emission, but also significantly extend service intervals.

The 374F and 390F implement 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 valve, which electronically manages flows and restrictions to exactly match hydraulic response to joystick movement. This fuel-saving feature smoothes hydraulic functions and adds to overall hydraulic efficiency.

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. For further fuel savings, electrically controlled regeneration systems in the boom and stick circuits move oil between the cylinder ends to reduce the load on the main hydraulic pumps.

Structural strength
The 374F and 390F are available with a range of booms and sticks fabricated with heavy, premium-steel plate and using high-strength castings and forgings in high-stress areas. All are stress-relieved for durability and inspected ultrasonically for quality. Heavy-duty reach boom and General Purpose boom are designed for general excavating and loading, and a mass-excavation boom delivers high production in large-scale earthmoving and heavy-material applications. A choice of sticks is available to match booms for meeting required digging depths, reaches and breakout forces.

Structural durability is ensured by the proven heavy-duty construction of the mainframes and undercarriage, with the upper frame incorporating special mountings to support the heavy-duty cab, and the lower frame heavily reinforced for long-term durability. A long-track, variable-gauge undercarriage—featuring massive track roller frames and high-tensile-strength-steel components—provides a wide, stable working basis, while adjusting to reduce shipping width. A new counterweight removal device is available to allow easier and more cost efficient transports.

Increased glass area (12 percent) in the F-Series cab enhances visibility for the operator, and operator sound levels are reduced by a significant 3 dB(A). The new LCD monitor offers 40% larger screen with 4 times higher resolution with more intuitive navigation. The monitor is programmable in 42 languages, presents detailed machine operating data and displays crisp images from the standard rearview camera. The cab used on the 374F and 390F incorporates special sealing and insulation to keep the operator's environment clean and comfortable. A climate-control system includes air conditioning and filtered-air ventilation, and seat options include air-suspension, heated, and cooled versions.

Routine maintenance points—grease fittings, fuel and oil filters, fluid taps— are conveniently grouped on the F-series and safely reached behind wide service doors from wide, slip-resistant catwalks. In addition, a fuel-tank drain cock simplifies evacuating water and sediment to protect the fuel system, and an integrated fuel-level indicator reduces the prospect of overfilling.

Cat Connect makes smart use of technology and services to help improve jobsite efficiency. LINK technologies, like the optional Product Link™ system helps fleet owners manage equipment productivity and lower owning and operating costs through the online VisionLink® interface by tracking critical items, such as location, hours, fuel usage, diagnostic codes, and idle time. F-Series machines also offer optional GRADE technologies like Cat Grade Control Depth and Slope to help operators work more productively and accurately and upgrade to 3D capability when job requirements change.

Machine Specifications

  374F 390F  
Engine Cat C15 Cat C18 Less
Net power, kW (hp) - ISO 9249        Less
Net power - ISO 9249  352kW  391 kW Less
Net power - ISO 9249  479 hp (metric) 532 hp (metric) Less
Operating weight, min., kg * 70,970 88,680 Less
Operating weight, max., kg ** 75,170 92,020 Less
Max. dig depth, mm *** 9,650 11,800 Less
Max. fwd reach, mm*** 14,230 17,250 Less
Implement Hyd. flow, L/min 448 x 2 504 x 2 Less
Implement Hyd. pressure, kPa 37,000 35,000 Less

* How equipped: Reach boom and shortest stick
374F with R7.8m boom, R2.84m stick, 3.8m³ bucket
390F with R8.4m boom, R3.4m stick, 4.6m³ bucket

** How equipped: Mass boom and longest stick
374F with M7.0m boom, M3.0m stick, 4.6m³ bucket
390F with M725m boom, M3.4m stick, 6.0m³ bucket

*** How equipped: Longest Reach boom and stick
374F with R7.8m boom, R4.7m stick, 3.8m³ bucket
390F with R10.0m boom, R5.5m stick, 3.9m³ bucket

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