The new Cat® 326 D2 hydraulic excavator combines high productivity, versatility and low operating costs with exceptional reliability. With a maximum operating weight of 26.345 t, the 326 D2 uses the Cat C 7.1 engine, which is rated at 140 kW (ISO 9249). It meets exhaust emissions equivalent to U.S. EPA Tier 2, EU Stage II, and China Tier 2 emission regulations and is equipped with a three-stage fuel-filtration system for optimum protection of fuel-delivery components. Premium features include cross-sensing hydraulics for greater efficiency, robust major structures for long-term durability, ergonomic cab for increased productivity, and simplified routine maintenance for reduced operating costs.
The 326 D2 pilot-operated hydraulic system provides 35 MPa main pressure and flow rates as great as 494 L/min for optimum hydraulic power in difficult applications. Dual main pumps continuously utilize 100 % of engine power. Regeneration valves in the boom-down and stick-in circuits speed cycles reduce hydraulic flow requirements and conserve fuel, while cylinder snubbers cushion shock in these circuits. Auxiliary hydraulic valve sections allow adding high- and medium-pressure circuits for work tools.
Depending on the region, the excavator is available with a standard undercarriage, designated the 326 D2, or a long undercarriage, designated the 326 D2 L. The massive, X-shaped, box-section carbody provides resistance to stress as it transfers working forces from the rugged upper mainframe to the high-strength track-roller frames. Structural welds are 95 % robotic, achieving three times the penetration of manual welds.
Also depending on the region, both the standard 5.9-meter reach boom and heavy-duty 5.9-meter reach boom have two stick options (2.95 m, 2.5 m) to tailor the front linkage to the task, and a mass-excavation 5.3-meter boom with its mass 2.5-meter stick deliver superior digging forces and permit the use of a larger bucket. In addition, a Super Long Reach front linkage features a 10.2-meter boom and 7.85-meter stick. Thus, the maximum digging depth is 6.4–14.590 m and maximum reach at ground level ranges from 9.74–18.3 m.
An ergonomically designed cab features low-effort joysticks, large glass areas to enhance all-around visibility, automatic bi-level air conditioner with defroster. The full-color LCD monitor is 40 % larger compared with the previous monitor and has enhanced resolution and serves as the display for an available rearview camera system. For operator convenience, joystick consoles are adjustable and viscous-rubber mounts between the cab and frame minimize sound and vibration.
To enhance serviceability, filter- and fluid-change intervals are displayed on the main menu of the monitor, and most routine service points are located at ground level. An easy-access, remote-greasing block on the boom delivers lubrication to difficult-to-reach components. SOS (Scheduled Oil Sampling) ports allow technicians to collect reliable samples of hydraulic oil, engine oil and coolant for analysis, and the Caterpillar Electronic Technician service tool is conveniently connected behind the cab.
Product availability may vary according to regions of the world.