Technical Description
The John Deere 744K Z-Bar wheel loader is a robust, heavy-duty machine designed for demanding construction and material handling tasks. It features a turbocharged charge air cooled 6-cylinder John Deere 6090H Tier III engine delivering 304 hp (227 kW) at 1500 rpm and a peak torque rise of 47%, ensuring strong performance and fuel efficiency. The machine operates with a countershaft powershift transmission, offering 4 forward and 3 reverse gears, with a maximum forward speed of 24.9 mph (39 kph) and reverse speed of 18.8 mph (29 kph).
The loader is equipped with a Z-bar linkage and a 10.8 ft (3 m) wide bucket, having a heaped capacity of 5.3 cu yds (4 m³) and a breakout force of 42,805 lbs (19,416 kg), allowing it to handle large loads effectively. Hydraulic pump flow capacity reaches 136.1 gal/min (515 l/min), with fast cycle times including a dump time of 1.4 seconds and raise time of 5.9 seconds, powered by two variable displacement, load-sensing axial piston pumps operating at 3288 psi.
Dimensionally, the 744K measures 29.6 ft (9 m) in length with the bucket on the ground, 9.8 ft (3 m) width over tires, 11.5 ft (3 m) cab height, and has a wheelbase of 11.4 ft (3 m). It delivers a dump clearance of 10 ft (3 m) at max lift. Operating weight is approximately 53,312 lbs (24,182 kg), and it uses large 26.5 R 25 tires suitable for rough terrain. The machine includes an 80 A alternator, a 24 V electrical system, and large fluid capacities for fuel (123.9 gal), hydraulics (42.1 gal), engine oil (9 gal), and transmission fluid (7.4 gal), supporting continuous heavy use in the field.
