The John Deere 544K Z-Bar Wheel Loader is a powerful, mid-sized machine designed for efficient material handling with a turbocharged, charge air-cooled 6-cylinder John Deere 6068H engine delivering 167 hp (125 kW) at 1900 rpm and a torque rise of 38%. It features a 3.1 cubic yard heaped bucket capacity with an 8.4 ft (2 m) width and a breakout force of 22,672 lbs (10,284 kg), enabling strong digging and loading performance. The loader has a maximum hinge pin height of 12.6 ft (4 m) and a dump clearance at max raise of 9.1 ft (3 m), providing good reach and height for dumping operations. The 544K has a wheelbase of 9.7 ft (3 m) and operates at an overall length of 24.4 ft (7 m) and width of 8.4 ft (2 m), with a ground clearance of 1.4 ft (0.43 m). Its operating weight is approximately 28,263 lbs (12,820 kg). The hydraulic system is a variable displacement axial piston pump with a flow capacity of 50 gallons/min (189 liters/min), supporting quick cycle times: 5.8 seconds raise, 1.2 seconds dump, and 3.2 seconds lower. The system operates at 3,650 psi relief valve setting. The countershaft powershift transmission offers 4 forward and 3 reverse gears, with top speeds of 22.2 mph (35 kph) forward and 15 mph (24 kph) reverse. Tire size is 20.5 R 25, providing robust traction and stability, and steering includes 24° rear axle oscillation with a 16.5 ft (5 m) turning radius. The fuel tank capacity is 85.9 gallons (322 liters), supporting extended operation. This loader balances power, reach, and durability for demanding earthmoving, construction, and material handling tasks.