John Deere 644B

The John Deere 644B is a wheel loader produced from 1974 to 1980. It features a John Deere 8.7L 6-cylinder turbocharged intercooled diesel engine producing 160 hp gross and 145 hp net. The loader has a 4-speed power shift transmission with 4 forward and 2 reverse gears, four-wheel drive with inboard planetary final drives, articulated power steering, and hydraulic wet disc brakes. It has a four-post ROPS with canopy and optional cab. The hydraulics system is open center with 2250 psi pressure and 62.5 gpm pump flow. Dimensions include a 104 inch wheelbase, 254.3 inch length, and operating weight of 28100 lbs. Tires are industrial 20.5-25 front and rear, with alternative 17.5-25 sizes. The front-end loader attachment has a breakout force of 24420 lbs, 45° dump angle, 34.3 inch reach, and 104.75 inch bucket width. Electrical system includes an alternator and two 12-volt batteries.