JOHN DEERE 644E W/ COUPLER WHEEL LOADER

Technical Description

The John Deere 644E Wheel Loader with Coupler features a turbocharged 6-cylinder 6076T engine delivering 168 hp gross (160 hp net) at 2200 rpm and 510 lb-ft torque at 1400 rpm. It has a displacement of 466 cubic inches (7.6 L) and a power-shift transmission with 4 forward and 3 reverse gears, reaching maximum speeds of 25.5 mph forward and 16.4 mph reverse. The hydraulic system includes a gear pump with a flow capacity of 65.5 gal/min at a relief valve setting of 2850 psi, delivering lift raise time of 6.2 sec, dump time of 1.8 sec, and lower time of 3.5 sec. The loader bucket has a breakout force of 35,098 lbs and capacities of 3.3 cu yds (heaped) and 2.8 cu yds (struck), with a width of 9.2 ft and dump clearance at max raise of 9.7 ft. Dimensions include a length of 25.4 ft with the bucket on the ground, a wheelbase of 10.5 ft, width over tires of 8.8 ft, ground clearance of 1.7 ft, height to the top of the cab of 11.2 ft, and max hinge pin height of 13.2 ft. Operating weight is 34,948 lbs, fuel capacity 75.1 gallons, and hydraulic fluid capacity 30.4 gallons. The machine’s rear axle oscillates 26°, and it runs on 20.5-25 tires. Electrical system is 12 V with a 65 amp alternator. The wide work envelope, strong breakout force, and efficient hydraulics make the 644E suitable for heavy material handling and construction site productivity.