JOHN DEERE 644K POWERLLEL WHEEL LOADER

Technical Description

The John Deere 644K Powerllel is a mid-size wheel loader engineered for versatile material handling and earthmoving applications. Powered by a John Deere 6068H turbocharged diesel engine, it delivers 232 horsepower (173 kW) at 1,700 rpm, providing robust performance across demanding jobsite conditions. The loader features a 4.0 cubic yard bucket capacity, accommodating substantial load volumes for efficient cycle times. Its innovative Powerllel linkage system delivers up to 33,903 pounds of breakout force, enabling powerful digging capabilities while maintaining parallel lift throughout the entire bucket range—a design that allows load forces to work with, not against, the boom. The standard five-speed PowerShift transmission with lockup torque converter in gears 2–5 optimizes fuel efficiency and acceleration during transport and ramp climbing, achieving maximum travel speeds of 40 km/h. With a turning radius of 5.57 meters and 40-degree articulation in each direction, the 644K delivers excellent maneuverability on tight jobsites. The Hi-Vis coupler enhances visibility and enables quick tool changeover for versatile work applications. Operating at 43,563 pounds, the loader provides exceptional stability and load capacity. Maximum dump clearance reaches 9.2 feet, facilitating efficient material discharge into trucks and hoppers. Optional features include rear locking differentials, wheel-spin control, customizable hydraulic controls, and payload scales, allowing operators to configure the machine for specific material handling requirements across diverse terrains.