LIEBHERR A904CHD CRAWLER EXCAVATOR

Technical Description

The Liebherr A904CHD is a robust wheeled material handler and excavator designed for versatile applications with high productivity and precision. It features multiple boom and stick configurations tailored to different operational needs: Option 1 with a 6.6m boom and 4m stick delivering a max depth of 7.3 ft, max height of 39.4 ft, and max reach along ground of 33.8 ft; Option 2 with a 6.6m boom and 5m stick offering a max depth of 10.5 ft, max height of 42.7 ft, and max reach of 37.1 ft; and Option 3 combining a 6.6m boom, 4m stick, and grapple model 65 enabling a max depth of 16.1 ft, max height of 31.9 ft, and max reach of 37.8 ft. This machine weighs approximately 53,800 lbs without attachments and measures a shipping length of 31.5 ft, shipping height of 10.7 ft, undercarriage width of 9.1 ft, and ground clearance of 1.2 ft. It is powered by a turbocharged, after-cooled Liebherr D 934 S engine with 390.6 cu in displacement producing 143 hp (107 kW), optimized for high torque at low rpm to maximize fuel efficiency and performance. The hydraulic system employs Liebherr’s variable displacement swashplate double pump rated at 50 gpm with a fluid capacity of 46.3 gallons, enabling precise and energy-efficient control, supplemented by a 24-volt electrical system and an 80-amp alternator. Mobility is ensured by a wheel undercarriage with 10.00-20 tires, 9.2 ft wheelbase, and travel speeds up to 12.5 mph. The swing mechanism provides a 9 rpm rotation speed powered by a Liebherr swash plate motor with integrated brake valve, supporting rapid and smooth operating cycles in heavy-duty construction, recycling, and material handling tasks.