Technical Description
The John Deere 644J Waste Handler is a heavy-duty wheel loader engineered for demanding waste management applications. It features a robust 6-cylinder, turbocharged, charge-air-cooled 6068H engine delivering 185 hp at 2,200 rpm and 749 lb-ft of torque at 1,400 rpm, with a 55% torque rise for enhanced performance. The loader is equipped with an automatic powershift transmission, offering three forward and reverse gears, with maximum speeds of 14.7 mph forward and 15.5 mph reverse. Its hydraulic system utilizes a variable axial piston pump, providing 68 gal/min flow and a 3,600 psi relief valve, enabling rapid cycle times: 5.9 seconds to raise, 2.8 seconds to lower, and 1.9 seconds to dump. The 4-cubic-yard heaped bucket delivers a breakout force of 28,848 lbs and a width of 9.8 ft, with a dump clearance of 8.8 ft at maximum raise. The machine measures 28 ft in length with the bucket on the ground, 11.2 ft in height to the top of the cab, and 9.1 ft in width over tires, with a 10.5 ft wheelbase and 1.5 ft ground clearance. The operating weight is 42,719 lbs, with a static tipping weight of 35,615 lbs. Standard features include a 24V electrical system, 80A alternator, and 23.5-25 tires. Fluid capacities include 39 gal fuel, 31 gal hydraulic, 7.8 gal cooling, 6.5 gal engine oil, and 7.1 gal transmission, with 5.9 gal each for front and rear axle/diff.
