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John Deere 644J 4WD Loader

Posted By admin On January 29, 2008 @ 12:00 am In Boomerang | No Comments

The 644J Loader is a 4-wheel drive, 4.25-cubic yard unit that can tackle a wide variety of jobs thanks to a variety of configurations, options and John Deere Worksite ProTM attachments. A Powerllel linkage version provides powerful digging forces and the convenient parallel lift characteristics for applications demanding versatility, while a Z-bar linkage is the choice for pure production.


Get Better Productivity


·        The John Deere PowerTech PlusTM delivers class leading horsepower to handle the most difficult applications


 


·        Exceptional power match between the engine and hydraulics provides excellent boom and bucket power going into the pile


 


·        The PowerTech Plus diesel engine delivers an impressive torque rise that tops out at 55 percent


 


·        Built-in Power Bulge generates additional horsepower when the rpms drop


 


For extra productivity without extra effort, the Powershift torque-converter transmission employs smart-shift technology to continuously evaluate speed and load conditions, and continuously adjust clutch-pack engagement to suit and ensure the smoothest gear and directional shifts in the industry


·        40-degree articulation allows for exceptional maneuverability in the tightest of quarters


·        Hydraulic locking differential


Get Better Operator Performance


·        Choose from single-lever joystick or two-lever fingertip pilot-operated controls, both featuring John Deere™s innovative Quick Shift pushbutton gear change


 


·        Backlit pushbuttons in the sealed touchpad allow fingertip control of numerous functions


 


·        No tool is required to adjust boom height kick-out, return-to-carry, or return-to-dig


·        Industry-leading 360-degree visibility gives clear sight lines to the work shead and the worksite around you.


·        Eleven automotive-style louvers provide effective airflow to help keep the view clear and the cab comfortable


 


Get Better Uptime


·        Quad Cool places the radiator and transmission, hydraulic and air-to-air coolers in a separate compartment for extra efficiency, easier clean-out and decreased debris buildup


 


·        The electronic system employs highly reliable circuit-board technology and solid-state switches, eliminating numerous wiring harnesses, fuses, relays, and connectors


 


·        Optional reversing fan back-blows every 30 minutes to help keep cores clean


 


·        All daily service points, including fuel, are on the left side for quick and convenient ground-level access


 


·        Extended engine, hydraulic and transmission service intervals contribute to low daily operating costs


 


·        An advanced monitor gives easy-to-understand diagnostic messages with possible solutions to help get back up and running fast without the need to connect to a laptop


 


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