The John Deere 444K Z-Bar Wheel Loader is a robust, high-performance machine engineered for demanding material handling applications. Powered by a John Deere 4045H, 4-cylinder, turbocharged, charge air cooled engine, it delivers 128 hp (95 kW) at 2,100 rpm and 374 lb-ft of torque at 1,400 rpm, with a 32% torque rise for responsive operation. The loader features a Z-Bar linkage, providing a breakout force of 18,104 lbs (8,212 kg) and a rated bucket capacity of 2.5 cu yds (2 m), with a bucket width of 8.4 ft (2 m). The hydraulic system utilizes a variable displacement, axial piston pump, delivering 37 gal/min (140 l/min) flow, with a relief valve setting of 3,600 psi, enabling fast cycle times: 5.9 seconds to raise, 2.4 seconds to lower, and 1 second to dump. The loader’s dimensions include a wheelbase of 9.1 ft (3 m), a length with bucket on ground of 22.6 ft (7 m), a width over tires of 8 ft (2 m), and a top cab height of 10.5 ft (3 m). Ground clearance is 1.3 ft (0.4 m), and the static tipping weight is 20,447.9 lbs (9,275 kg). The transmission is a countershaft, powershift type with 4 forward and 3 reverse gears, offering a maximum forward speed of 22.4 mph (35 kph) and reverse speed of 15.8 mph (24 kph). Operating weight is 24,372 lbs (11,055 kg), with a 64 gal (242 l) fuel capacity. The machine is equipped with 17.5 R 25 tires and a 24V electrical system, ensuring reliable performance in diverse conditions.