CATERPILLAR 994H WHEEL LOADER

Technical Description

The Caterpillar 994H is a heavy-duty wheel loader designed for large-scale mining and quarry operations. It is powered by a Cat 3516B HD EUI engine, delivering a net power of 1463 hp (1091 kW) at 1600 rpm with a torque rise of 32%, ensuring robust performance under demanding conditions. The engine features a bore of 6.7 in (15 cm), stroke of 8.5 in (20 cm), and 4875 cu in displacement. The loader's operational weight is approximately 430,858 lbs (195,434 kg), with variants reaching up to 471,399 lbs (213,825 kg) for super high lift configurations. The 994H offers a rated bucket capacity ranging from 18.4 to 47 cubic yards (14 to 36 m³), depending on the model configuration, with dump clearance heights up to 23.92 ft (7 m) in super high lift versions. Its hydraulic system includes double-acting lift/tilt cylinders (lift bore 13 in, stroke 67.1 in; tilt bore 10.5 in, stroke 44.9 in) driven by four variable displacement piston pumps, providing positive flow control at a relief valve setting of 4750 psi. The steering system uses a closed circuit with two variable displacement piston pumps and a relief valve setting of 4500 psi, enabling an articulation angle of 40° and axle oscillation of 10° for enhanced maneuverability. Transmission is a Cat planetary power shift with three forward speeds up to 14.9 mph and three reverse speeds up to 16 mph. The 994H complies with SAE and ISO standards for cab (ROPS/FOPS) and brakes, ensuring operator safety and machine reliability. Service capacities include a 1013-gallon fuel tank and large fluid reservoirs for cooling, crankcase, and differentials, supporting extended operation intervals. The machine is optimized for matching Cat mining trucks such as models 785, 789, and 793, with rated payloads from 35 to 38 tons depending on lift configuration.