The CASE 621E XT is a high-performance articulated wheel loader engineered for demanding construction and material handling applications. Powered by a turbocharged and aftercooled Case Family IV 667TA/EDB Tier III certified 6-cylinder diesel engine, it delivers 156 hp (116 kW) at 1800 rpm and 508 lb-ft of torque at 1300 rpm, with a 33% torque rise for robust performance. The loader features a 4F/3R proportional transmission with electronic control module, offering both autoshift and manual shift options for versatile operation. Hydraulic system specifications include a closed-centered pressure/flow compensated pump, 45.2 gal/min (170 L/min) flow capacity, and a 3600 psi relief valve, enabling rapid cycle times with a 6.3-second raise, 4.7-second lower, and 1.7-second dump. The Z-bar loader linkage provides a maximum breakout force of 24,298 lbs (11,022 kg) and a rated bucket capacity of 3.0 cu yds (2 m³), with a bucket width of 8.6 ft (2.6 m). The machine has a maximum hinge pin height of 13 ft (4 m), a dump clearance of 9.2 ft (3 m), and a reach at max lift and dump of 3.8 ft (1.2 m). Standard operating weight is 28,709 lbs (13,022 kg), with a static tipping weight of 23,376 lbs (10,603 kg). The 621E XT is equipped with 20.5 R25 tires, a 24V electrical system, and a 65-gallon (246 L) fuel tank, ensuring extended operation and reliability in diverse environments.