LIEBHERR A311 CRAWLER EXCAVATOR

Technical Description

The Liebherr A311 is a robust wheeled mobile excavator designed for versatile excavation tasks, featuring a powerful 91 hp (68 kW) direct injection turbocharged BF4M2012 engine with a displacement of 244.1 cubic inches and four cylinders operating at 2000 rpm. It boasts a maximum cutting height of 21.9 ft, a maximum digging depth of 13.5 ft, and a maximum reach along the ground of 27.6 ft. The unit’s maximum loading height is 22.2 ft, supported by a hydrostatically adjustable boom and stick configuration. The excavator is equipped with a bucket capacity ranging from 0.2 to 0.4 cubic yards, suited for diverse material handling demands. Its hydraulic system features a variable displacement swashplate pump with a flow capacity of 58.2 gallons per minute, operating at a relief valve pressure of 5076.4 psi, enabling efficient boom and stick movement. The A311's operating weight is approximately 25,573.7 lbs, riding on 9.00-20 tires for mobility with a maximum travel speed of 12.5 mph, powered by an oversized two-speed power shift transmission with integrated protection and an additional creeper speed option. The swing mechanism operates at 9 rpm, providing agile maneuverability on-site. Electrical systems include a 24 V operating voltage with a 55-amp alternator to support auxiliary loads. The excavator carries a 56.8-gallon fuel tank, ensuring extended operation periods between refueling. This combination of power, reach, and hydraulic efficiency makes the Liebherr A311 suitable for demanding construction and excavation applications requiring both precision and mobility.