The Case 821B is a robust wheel loader engineered for demanding construction and mining applications. It features a turbocharged Case 6T-830 6-cylinder, 4-stroke direct injection diesel engine delivering a gross power of 198.5 hp (148 kW) and net power of 185.1 hp (138 kW) at 2000 rpm, with a maximum torque of 591.6 lb-ft at 1400 rpm. The engine's bore and stroke measure 4.5 in and 5.4 in respectively. The loader’s transmission is mechanical, offering 4 forward and 3 reverse gears, with a maximum forward speed of 23.8 mph and reverse speed of 15.5 mph. Its hydraulic system uses a tandem pump with a flow capacity of 79.3 gal/min and achieves bucket dump, lower, and raise times of 1.6, 3.8, and 6.2 seconds respectively. The bucket capacity is 3.6 cubic yards heaped (3.1 struck) with a breakout force of 37,109 lbs and a width of 9.1 ft, providing significant material handling capability. Dimensionally, the loader measures 24.6 ft in length with the bucket on the ground, 8.9 ft in width over tires, has a ground clearance of 1.4 ft, a top cab height of 11 ft, and a hinge pin maximum lift height of 13 ft. Operating weight is 37,040 lbs, supported by a fuel capacity of 70.8 gallons. Fluid capacities include 5.5 gal engine oil, 8.5 gal cooling fluid, 5.6 gal front axle/diff fluid, 4 gal rear axle/diff fluid, and 7.1 gal transmission fluid. It operates on a 24 V electrical system with a 65 A alternator. The Case 821B blends power, efficiency, and durability suited to heavy-duty earthmoving tasks.