CATERPILLAR 311B CRAWLER EXCAVATOR

Technical Description

The Caterpillar 311B is a robust medium-sized hydraulic excavator designed for demanding excavation tasks. It features a Cat 3064T turbocharged diesel engine producing 79 hp (59 kW) at 1800 rpm, delivering reliable power and performance. The machine offers multiple boom and stick configurations, with maximum cutting heights ranging from 25.2 ft to 26.7 ft, digging depths from 15.6 ft to 18.4 ft, and maximum reach along the ground from 24 ft to 26.6 ft, depending on the selected option. The bucket capacity ranges from 0.5 to 1.1 cubic yards, providing versatility for various digging and loading applications. The hydraulic system is engineered for high efficiency, with a maximum implement pressure of 4340 psi, travel pressure of 4980 psi, and swing pressure of 3340 psi. The boom cylinder bore is 4 in with a 40 in stroke, the stick cylinder bore is 4.3 in with a 47 in stroke, and the bucket cylinder bore is 4 in with a 37 in stroke. The excavator has a shipping height of 9.1 ft and a shipping length of 23.8 to 23.9 ft, with a ground clearance of 1.5 ft and a width to the outside of tracks of 8.2 ft. The operating weight is approximately 24,526.5 to 27,680 lbs, ensuring stability and traction. The drive system provides a maximum drawbar pull of 20,720 lbs and a travel speed of up to 3.5 mph. The undercarriage features a 19.7 in shoe size and a track gauge of 6.6 ft, with a ground pressure of 5.6 psi. The machine is equipped with a 24-volt electrical system, a 50-amp alternator, and comprehensive service refill capacities for cooling, engine oil, fuel, and hydraulic systems.