The Case 521D XT is a robust wheel loader optimized for heavy-duty construction tasks, featuring a turbocharged and aftercooled 4-cylinder Family III 445TA/M2 engine delivering 119 hp gross (110 hp net) at 2000 rpm with a torque rise of 14% at 1400 rpm. It offers a breakout force of 21,929 lbs (9,947 kg) and a bucket capacity of 2 cubic yards (2 m³) with an 8.1 ft (2 m) width, allowing efficient material handling. The loader's dimensions include a ground clearance of 1.3 ft, height to top of cab of 10.5 ft, and a hinge pin max height of 12.3 ft, with an operating length of 22.1 ft and a wheelbase of 9.1 ft, enabling good maneuverability with a 16.3 ft turning radius. The hydraulic system has a pump flow capacity of 35.4 gal/min at 2750 psi relief valve setting, offering fast cycle times with 1.1 sec dump, 5.6 sec raise, and 3.7 sec lower times. Transmission is a 4 forward/3 reverse proportional torque sensing autoshift/manual shift model, providing max speeds of 23.4 mph forward and 15.2 mph reverse. The machine operates on a 24 V electrical system, holding 50 gallons fuel capacity, 30 gallons hydraulic fluid, and weighs 23,938 lbs (10,858 kg) operating weight. It runs with 17.5x25 tires and features rear axle oscillation of 24°, enhancing performance on uneven terrain. This wheel loader balances powerful performance and operational efficiency for various lifting and loading applications.