Technical Description
The Caterpillar 312B L is a robust hydraulic excavator designed for versatile construction and excavation applications. Powered by a turbocharged Cat 3064T diesel engine, it delivers a net power output of 84 hp (63 kW) at 1900 rpm with a displacement of 259 cubic inches. The machine features a fully hydrostatic drive system, providing a maximum drawbar pull of 22,930 lbs and a travel speed up to 3.5 mph (5.6 kph). Its operating weight is approximately 31,110 lbs.
The excavator offers three boom and stick configurations for different operational requirements, with maximum digging depths ranging from 16.9 ft to 19.9 ft, maximum reach along the ground between 25.6 ft and 28.3 ft, and maximum cutting heights up to 28.6 ft. Loading height varies from 19.3 ft to 20.8 ft depending on the boom/stick option selected. The maximum vertical wall digging depth ranges from 14.6 ft to 17.6 ft, supporting diverse excavation tasks.
Hydraulics are powered by dual variable displacement axial-piston pumps with a combined maximum flow of around 64 gpm, and system pressures reaching up to 4,980 psi, ensuring strong implement and swing performance. The boom cylinder has a 4.3-inch bore with a 40-inch stroke, while the stick cylinder measures 4.8 inches bore and 47 inches stroke.
Bucket capacities range from 0.5 to 1.1 cubic yards, with a reference bucket size of 0.6 cu yd. Key dimensions include a ground clearance of 1.5 ft, a tail swing radius of 7 ft, and an 8.2 ft track width. Hydraulic fluid capacity is 42.8 gallons, with a fuel capacity of 66.1 gallons.
The cab is designed for operator comfort and control, featuring easy-to-use joysticks, adjustable seating, and climate control options. The undercarriage features 19.7-inch wide shoes, a track gauge of 6.6 ft, and a length of track on ground of about 10 ft, enhancing stability and maneuverability. Overall, the Caterpillar 312B L provides a durable, efficient, and operator-friendly solution for mid-sized excavation projects.
