The CASE 521E XT wheel loader features a robust turbocharged 4-cylinder Case Family IV 445TA/EGE Tier 3 engine delivering 131 hp (98 kW) at 1800 rpm with a torque rise of 19% at 1300 rpm. It offers a 2.2 cu yd (2 m³) heaped bucket capacity and an 8.4 ft (2 m) bucket width, with a maximum dump clearance of approximately 9 ft (3 m). The loader's operating weight is 26,861 lbs (12,184 kg), supported by a 9.1 ft (3 m) wheelbase and 17.5 x 25 L3 tires, allowing a turning radius of 16.4 ft (5 m). The hydraulic system provides efficient cycle times with a 35.4 gal/min (132 l/min) pump flow, dump time of 1.1 seconds, raise time of 5.6 seconds, and lower time of 2.7 seconds at a relief valve setting of 3625 psi. This loader runs on a 24-volt system, with a 70-amp alternator and has a fuel capacity of 50 gallons (189 liters). Cooling fluid capacity is 5.9 gallons (19 liters) and hydraulic fluid capacity is 30.2 gallons (114 liters). Transmission includes 4 forward gears and 3 reverse gears, with a maximum forward speed of 22.3 mph (35 kph) and reverse speed of 14.1 mph (23 kph). The 521E XT features true parallel lift linkage for precise material handling. Its dimensions include a cab height of 10.8 ft (3 m), hinge pin height at 12.3 ft (4 m), and bucket reach at max lift of 3.7 ft (1 m). Rear axle oscillation allows 24° travel for better terrain adaptability, optimizing performance for construction, sewer, water, and agricultural applications.