Technical Description
The Link-Belt 3900 Quantum is a high-performance hydraulic excavator engineered for demanding construction and excavation tasks. With a robust operating weight of 62,900 lbs and a long undercarriage, this model delivers exceptional stability and durability. It is powered by a turbocharged Cummins 6CT8.3 diesel engine, producing 178 hp (133 kW) at 2,200 rpm and 516 lb-ft of torque at 1,450 rpm, ensuring strong all-day digging power. The hydraulic system features two variable displacement axial piston pumps and one gear pump for pilot controls, managed by the advanced Link-Belt Intelligent Quantum (IQ) Control system, which offers four selectable working modes, power boost, auto idling, and one-touch decelerator for optimized efficiency and operator comfort. The excavator is equipped with a 24-volt electrical system, a 65-amp alternator, and a double-element air filter for reliable operation in harsh environments. The hydraulic pump flow capacity is 112 gpm, with a system relief valve pressure of 4,980 psi, supporting high productivity. The undercarriage includes 50 shoes per side, 9 track rollers per side, and a 31.5-inch shoe size, providing a ground pressure of 6 psi and a maximum travel speed of 3 mph (5 kph). The swing mechanism delivers a speed of 10.4 rpm, and the machine features a 3-speed hydrostatic travel system with automatic downshift for increased tractive effort. The Link-Belt 3900 Quantum offers a maximum bucket capacity of 2.3 cu yd and a reference bucket capacity of 1.3 cu yd, with a fuel tank capacity of 81.9 gal. The operator station is designed for comfort and accessibility, featuring a suspension seat, illuminated LCD service monitor, and intuitive controls. This excavator is ideal for a wide range of applications, from heavy production digging to precise lifting tasks.
