Cat® 313D GC (Series 2) Designed for High Performance, Reliability, Long-Term Durability

Cat® 313D GC (Series 2) Designed for High Performance, Reliability, Long-Term Durability

For Release in China, Taiwan: May 2017 
Release Number: 71PR17

The new Cat® 313D GC (Series 2) hydraulic excavator is designed to combine powerful, versatile, performance with low owning and operating costs for optimum customer value. With a maximum operating weight of 13 400 kg (29,542 lb.), the 313D2 GC uses a fuel-efficient Cat C4.4 diesel engine and features a powerful hydraulic system that delivers high flows and pressures for aggressive digging and lifting, as well as for handling powered attachments. Operator comfort and safety, as well as accessible serviceability, are key aspects of the machine's design, and the new model's robust main structures ensure structural strength and durability.

The engine, ISO 14396-rated at 75 kW (100 net horsepower) and meeting China Nonroad Stage III emission standards, equivalent to EU Stage IIIA and U.S. EPA Tier 3 , has a mechanically controlled, low-pressure fuel-injection system, capable of operating efficiently with fuels of varying quality. The fuel system incorporates a highly efficient filtration system with a primary filter/ water separator and a small-micron final filter. Configured to operate at a maximum speed of 1,650 rpm with a net-power rating of 55kW (74 horsepower), the 313D2 GC uses up to 15 percent less fuel, depending on the application, compared with its 313D2 counterpart.

Powerful and versatile

Hydraulic power and efficiency are key design features for the new 313D2 GC, with hydraulic flows to 232 L/min (61.3 gpm) and a main-relief pressure of 30 500 kPa (4,424 psi). Auxiliary-hydraulic and electrical lines are routed to the boom foot to facilitate installation of added circuits, and the compact design of the hydraulic system utilizes short tubes and lines to reduce friction and pressure drop. Hydraulic snubbers at the rod end of the boom cylinders and both ends of the stick cylinders cushion shock, reduce sound, and increase cylinder life.

Hydraulic flow is reduced to a minimum when controls are in neutral to reduce fuel consumption and to extend component life, and a hydraulic cross-sensing system uses two hydraulic pumps under all operating conditions to enhance implement speed and stronger pivot turns. Regeneration valves in the boom and stick circuits save energy during boom-down and stick-in operation to increase efficiency by reducing loads on the pump to conserve fuel.

 Work-mode and power-mode switches have been eliminated, making full power available at all times, and automatic boom- and swing-priority functions automatically select the optimum mode based on joystick movement. Electronic controls match engine speed and hydraulic demand, and flow is reduced when controls are in neutral to reduce fuel consumption and component wear. Versatility is enhanced with a complete range of available buckets and work tools, including grapples, thumbs, hydraulic hammers, and compactors.


Caterpillar uses advanced engineering and software to analyze structures, creating a durable, reliable machine for the most demanding applications. More than 70 percent of structural welds are robotic and achieve three times the penetration, compared with manual welds.

The carbody's X-shape, box-section design resists bending, and track-roller frames are press-formed in a strong pentagonal shape. Sealed and grease-lubricated track chains reduce pin-and-bushing wear and reduce travel noise. Travel motors have automatic speed selection, allowing the 313D2 GC to change between high and low speed ranges as the operating situation demands.

The 2.5-meter (8.17-ft.) stick—or available 3.0-meter (9.83-ft.) stick—incorporate new forging and welding processes for increased durability, digging forces, and lifting capacities. The 4.65-meter (15.25-ft.) one-piece reach boom features components fabricated from a new, stronger forging pattern. A light attached to the left side offers improved visibility in low-light conditions.

Operating environment

The 313D2 GC's spacious cab is designed with easy-to-reach controls and uses special viscous cab-to-frame mounts to significantly reduce vibration and sound. A thick steel tube along the bottom perimeter of the cab further reduces vibration and enhances resistance to fatigue.

 The suspension seat is comfortable and accommodating, joystick controllers are adjustable with a low-effort pilot-operated design, and positive filtered-air ventilation keeps the operator's environment clean. Large, frameless glass areas in the cab provide all-around visibility, and for added safety, the front upper windshield is laminated. The monitor is a full-color LCD-type that can display information in 27 languages, including Chinese.

For operator and service technician safety, the hydraulic-activation lever locks out all hydraulic functions when the operator exits the cab. A full-length fire wall separates the engine compartment from the hydraulic-pump compartment, and a ground-level engine-shut-off switch stops the engine in an emergency. Also, anti-skid plating with countersunk retainers helps the operator and technician move around the machine with added safety.

Serviceability and technology

Most routine service points for the 313D2 GC can be reached from ground level, with the highly efficient water separator and fuel filters conveniently positioned in an easily accessed compartment that also encloses the radiator, oil cooler, and air-to-air after-cooler.

Taps for hydraulic system pressures and S·O·SSM (Scheduled Oil Sampling) ports for hydraulic fluid, coolant, and engine oil are easily accessible. A greasing manifold allows lubrication of remote pivots, and a test connection for the Caterpillar Electronic Technician (Cat ET) service tool is located behind the cab.


313D GC Series 2 Specifications



Cat C4.4

 Power rating (ISO 14396)

75 kW (100 hp)

Operating weight, max.

13 400 kg (29,542 lb)

Tail-swing radius

2 140 mm (7 ft.)

Max. digging depth, 2,5-meter stick

5 540 mm (18.33 ft.)

Max. reach – horizontal

8 180 mm (26.83 ft.)

Max. travel speed

5.1  km/h (3.2 mph)

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