The CASE 1221F is a high-performance articulated wheel loader engineered for heavy-duty material handling and earthmoving applications. Powered by a Cummins QSX11.9, 6-cylinder, 4-stroke, turbocharged engine, it delivers 355 hp (265 kW) gross and 351 hp (262 kW) net, meeting Interim Tier 4 emissions standards. The engine produces a peak torque of 1,250.2 lb·ft at 2,100 rpm, with a 40% torque rise for responsive operation. The loader features a robust hydraulic system with an axial piston pump, providing 111 gal/min (420 L/min) flow and a maximum system pressure of 3,983 psi, enabling fast cycle times of 11.6 seconds (unloaded). The transmission is a powershift type with four forward and three reverse gears, differential lock on both axles, and a top speed of 22.4 mph (35 km/h). The service brakes are wet multi-disc for reliable stopping power. The 1221F has a rated bucket capacity of 6.9 cu yds (5 m³), a breakout force of 55,730.2 lbs (25,279 kg), and a tipping load of 45,723.9 lbs (20,740 kg). Key dimensions include a 31.6 ft (9 m) overall length, 10.6 ft (3 m) width over tires, 12.7 ft (4 m) cab height, and a 24.9 ft (7 m) turning radius. The operating weight is 66,425.3 lbs (30,130 kg), with a ground clearance of 1.7 ft (0.5 m). The loader is equipped with a 24V electrical system, 80A alternator, and 113.6 gal (428 L) fuel tank, ensuring extended uptime and durability in demanding environments.