Technical Description
The Liebherr L556 wheel loader features an 8.6 ft (2 m) arm length and a breakout force of 33,719 lbs (15,295 kg), delivering powerful material handling. Its heaped bucket capacity is 4.7 cubic yards (3 m³), with a bucket width of 8.1 ft (2 m) and a digging depth of 3 ft (1 m), optimizing loading efficiency. The loader offers a dump clearance of 9.4 ft (3 m) at maximum raise, a ground clearance of 1.7 ft (0.5 m), and a hinge pin max height of 12.1 ft (4 m), supporting effective maneuvering in varied terrain. The machine weighs 39,460 lbs (17,899 kg) and has a wheelbase of 10.1 ft (3 m) with a turning radius of 21.3 ft (6 m), fitted with robust 23.5R25 L3 tires.
Powered by a 4-cylinder Liebherr D934 A7 engine with a displacement of 428 cu in (7 L), it produces 188 hp (140 kW) at 1500 rpm, with a max torque of 632 lb-ft. Engine features include water cooling with turbocharging, externally cooled exhaust gas recirculation, and a diesel particulate filter. The electrical system operates at 24 V with dual 140 Ah batteries and a 28/100 V/A alternator.
Its hydraulic system uses a load-sensing variable axial piston pump with 62 gal/min (235 l/min) flow capacity, delivering 5.5 sec raise time, 2.3 sec dump time, and 2.7 sec lower time, with a relief valve setting of 4351 psi. Fluid capacities include 79 gal fuel, 64.7 gal hydraulic fluid, and appropriate cooling and transmission fluids. The transmission offers 3 forward and 3 reverse gears, achieving maximum speeds of 24.9 mph (39 kph) in both directions. This combination of power, capacity, and efficiency makes the Liebherr L556 a reliable and productive wheel loader for heavy-duty applications.
