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Cat 374D Excavator

Increased Digging Forces, Stronger Undercarriage, Enhanced Comfort

The new Cat 374D hydraulic excavator, a direct replacement for the model 365C, combines added horsepower, stronger hydraulics and greater operating weight to boost overall performance, whether trenching, loading, lifting or handling attachments. Complementing these design basics are undercarriage improvements, a new range of buckets, operator-convenience features, safety enhancements and serviceability improvements. The fuel efficient 374D weighs 156,819 pounds (71,132 kg) and is designed for reliable, low-cost operation and long-life durability for optimum customer value. 

More power, capable hydraulics
Rated at 476 net horsepower (355 kW), the Tier 3/Stage IIIA-compliant Cat C15 engine provides the 374D with 18 percent more power than its predecessor, the 365C. Cat ACERT Technology equips the C15 with advanced electronic control, precise fuel delivery and refined air management to deliver clean combustion and optimum fuel efficiency. The electronic engine controller, with flexible fuel mapping, allows the engine to respond efficiently to specific operating conditions, which means more work for each fuel dollar.

The C15 torque characteristics enable the engine to deliver full power at maximum rpm, resulting in efficient hydraulic pump operation and enhanced hydraulic response. In addition, the new titanium-alloy compressor wheel in the turbocharger increases reliability and performance at higher altitudes.

The 374D implement hydraulic system features a 10-percent increase in flow and a 9-percent gain in main pressure, resulting in a significant boost in hydraulic horsepower. The added hydraulic power combines with larger digging arm and bucket cylinders to yield 17 percent higher digging arm forces and 12 percent higher bucket forces on machines with the standard (reach) boom and arm configuration. For units in the mass excavation configuration, digging arm forces also are up by 17 percent and bucket forces by 5 percent. The net result is shorter cycle times and increased bucket fill factors.

Also new in the 374D implement hydraulic circuits are electrically controlled regeneration valves, which assure positive response from the boom and digging arm cylinders. In addition to further reducing cycle times, the new valves yield an estimated fuel saving of more than 2 percent. Also saving fuel is the hydraulically driven, variable-speed cooling fan.

Buckets, undercarriage, serviceability
A new line of buckets for the 374D are designed for added strength and durability to accommodate the higher digging forces of the new machine. Bucket types include general duty, heavy duty, severe duty and extreme duty. All Cat buckets feature K Series GET (Ground Engaging Tools). Work tools for the 374D extend the machine application into such operations as demolition, scrap processing and quarry work.

Undercarriage improvements include redesigned track links that operate with less stress, improved carrier rollers, longer recoil springs for extended service life and new forged idlers for improved durability. The new idlers are positioned lower to promote added stability, and a 6-inch (160-mm) track-gauge increase further enhances the stable work platform.

In addition, the carbody (the structure mounting the machine upper to the track assemblies) is reinforced at the roller-frame interface, and a new bolt pattern is used at the connection point. The boom foot, skirt and counterweight mounting area also have been strengthened for longer service life and increased durability.

To facilitate routine maintenance, the 374D uses protected fluid drain ports and self contained hoses, spin-on filters, an integral pre-cleaner in the air cleaner (with electronic restriction sensing), testing ports in all pressure circuits and pressurized fluid sampling ports to assure reliable samples. Also, the Electronic Power Control (EPC) is now located in the air-cleaner compartment, allowing the cab floor to be washed without risk of damage to the EPC, although the EPC and electrical terminals are weather-proof. For the operator's convenience, fluid levels can be checked electronically at start-up.

Operator comfort and safety
For the operator's convenience and comfort, the height of the joystick consoles is now adjustable, and the response of the joystick control levers can be adjusted to the operator's preference through the monitor. The control pattern changer, also accessible through the monitor, allows operators to select preferred lever functions.

The monitor provides a full-color graphic display with comprehensive machine information (including fuel consumption) presented in either an English or ISO format. The monitor also displays images from the optional rearview camera.

To diminish heat and noise in the cab, the hydraulic control valve, pumps and reservoir are positioned away from the operator station. Metal-grating catwalks, 20-inches (500-mm) wide, are located on each side of the upper structure to provide safe access to maintenance points. The rear window, made of tempered glass, can be removed as a secondary exit.

Standard halogen lights provide exceptional jobsite illumination but can be replaced with optional High Intensity Discharge lights on the boom and upper cab if more illumination is required. Lights are time delayed to allow safe exit from the machine at night. As an added safety measure, travel, swing and implement functions are locked out when the counterweight removal system is activated.

 

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New John Deere 17G & 26G Compact Excavators Make a Sizable Impact on the Jobsite

John Deere continues to upgrade its G-Series excavator lineup with the introduction of the 17G and 26G compact excavators. These machines offer a Final Tier 4 compliant engine without the need for an after treatment device, a spacious cab, and smooth, responsive hydraulic controls. The nimble excavators were designed with the rental, commercial/residential building, landscaping, underground, and site development industries in mind.

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Hitachi Dash-5 Compact Excavator Models Deliver Versatility, Big-Time Performance

Hitachi Construction Machinery-Americas has upgraded its compact-class excavator line by introducing the ZX17U-5 and ZX26U-5.

Although they are the smallest Hitachi excavators, the ZX17U-5 and ZX26U-5 provide big-time performance on all kinds of jobs. These Dash-5 Compact Excavators feature EPA Final Tier 4 (FT4)/EU Stage IV engines and simplified maintenance with an added steel service door and side-by-side cooling cores. Additionally, the ZX17U-5 features redesigned blade extension pins, and the upgraded ZX26U-5 operator’s station provides wider entry and better visibility.

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Terex Tier 4 Final TC16 AND TC29 Excavators

The new Terex TC16 and TC29 compact excavators are designed to enhance jobsite productivity, efficiency and cost-effectiveness, while allowing operators to work with precision and power. These models offer many of the same popular features as the predecessor models, such as the adjustable Knickmatik boom system and Terex Fingertip controls, with enhanced capacities of their Tier 4 Final Mitsubishi diesel engines. The productive horsepower and improved fuel efficiency with electronic governance of the new Terex TC16 and TC29 compact excavators allow operators to dig deep, reach far and lift heavy loads at a low cost of operation, increasing return-on-investment.

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Hitachi Introduces the New ZX300LC-6 Excavator

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Komatsu America Corp. Launches the New PC390LC-11 Hydraulic Excavator

Komatsu America Corp. has introduced the PC390LC-11 hydraulic excavator. With a net horsepower of 257 hp. (192 kW), the PC390LC-11 is powered by a Komatsu SAA6D114E-6 engine, which is EPA Tier 4 Final emissions certified. Komatsu’s Tier 4 Final engines are built on the solid foundation that started in 1996 with the introduction of Komatsu’s first Tier 1 engine. The culmination is today’s Tier 4 Final engine that is productive, dependable and efficient. This new excavator leverages Komatsu’s leadership in technology and innovation by delivering an environmentally friendly engine that provides high levels of performance while reducing operating costs and improving fuel efficiency.

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The unique remote-controlled JCB excavator in action at Birmingham New Street Train Station.
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