DEERE - 644X Back
DEERE 644 X-TIERMID-SIZE WHEEL LOADERS
ON THE CUTTING EDGE
The multipurpose 644 X-Tier Wheel Loader is designed and purpose built to take it on and go beyond. With its combined innovative E-Drive and PowerShift transmission system that delivers strong pushing power and fast ramp-climbing ability, tasks ranging from loading trucks to maintaining stockpiles to heaping hoppers can be accomplished with efficiency and ease. And this impressive iron runs quiet, too. The 644 X tier is packed to the max with the state-of-the-art technology and innovative features that can help take your operation to new heights of productivity and performance.
POWER WITHOUT COMPROMISE
Choose between variable and constant engine speeds in normal and performance modes. Drivetrain and hydraulic functions are powerful, responsive, and quick, to deliver exceptional productivity in the most demanding applications.
Innovative E-Drive transmission system delivers premium performance and efficiency. System includes an engine-driven generator plus an inverter to control the electric motor that drives a simplified PowerShift transmission.
MOVE MORE WITH LESS
Efficiency is outstanding, with up to 18-percent more tons moved per gallon of fuel burned than top competitors.*
Purpose-built PowerShift transmission provides smooth control through four forward speed ranges. Direction changes are accomplished by the electric motor, completely eliminating shifting in some truck-loading applications.
THE BUCKET LIST
A wide-ranging selection of enhanced production buckets with integrated spill guards, curved side cutters, and impressive rollback maximizes bucket-fill performance and material retention. Choose from hi-vis and JRB-style couplers to maximize fleet versatility and machine utilization.
MAKE A GOOD IMPRESSION
Running wide open at 1,600 rpm, the in-cab noise rating is just 70 dBA. Reduced exterior noise makes the 644 X tier a great choice when working in residential areas.
John Deere E-Drive technology in our 644 and 944 Wheel Loaders has collectively logged over two million field hours a testament to the durability and performance of our transmission components and systems.
THE COAST IS CLEAR
Coast-control feature slows the loader down without the operator having to touch a pedal, helping extend service-brake wear life.
TIME TO TAKE SIDES
All daily service points including fuel are conveniently grouped on the left side of the machine at ground level, for easy access. Hinged doors enable wide-open access to the engine, cooling system, and other components.
Spacious cab boasts ample legroom and features ergonomically placed controls, foot pedals, and sealed-switch module. Seat-mounted hydraulic controls include two programmable multifunction buttons and intuitive electrohydraulic (EH) controls.
With the capacity to control up to six functions on the single hydraulic joystick, cycle times and productivity when using hydraulic attachments are improved.
REMOTE DIAGNOSTICS AND SUPPORT
To maximize uptime and lower costs, JDLink connectivity provides machine location, utilization data, and alerts to help you maximize productivity and efficiency. JDLink also enables John Deere Connected Support. Dealers use Expert Alerts based on data from thousands of connected machines to proactively address conditions that may otherwise likely lead to downtime. Your dealer can also monitor machine health and leverage remote diagnostics and programming capability to further diagnose problems and even update machine software without a time-consuming trip to the jobsite.*
INNOVATIVE JOHN DEERE E-DRIVE SYSTEM DELIVERS PREMIUM PERFORMANCE AND EFFICIENCY
WHAT IT IS
The Electric Drive system (E-Drive) is composed of a brushless electric generator and motor, power electronics (inverter), an electric brake resistor, and a simplified PowerShift transmission. This E-Drive system offers next level size class performance, ease of operation, and longevity to customers that invest in this innovative technology. The entire system works to dynamically adjust engine speed to meet tractive and hydraulic loads, ensuring 644 X-tier loaders can maintain stockpiles, heap hoppers, and load trucks with the highest efficiency. All of John Deeres E-Drive components are performance proven with over 2 million field hours accumulated and counting.
HOW IT WORKS
Brushless generator converts rotational energy from the engine into 3-phase alternating current (AC) electrical energy
AC energy is supplied to the inverter, which delivers energy to the motor based on operator demand
Single brushless electric motor converts AC energy back to rotational energy and torque, replacing the job of a torque converter
Simplified PowerShift transmission maintains smooth shifting across four operating speed ranges
When decelerating, the electric motor can also act as a generator to recapture energy from the loaders inertia and recycle it back into the system
Brake resistor passively consumes excess recycled energy whenever the inverter actively controls its circuit
WHY IT MATTERS
Electric motor doubling as a generator when decelerating reduces engine load and fuel consumption
Electric motor turns transmission bi-directionally to switch from forward to reverse, eliminating directional control clutch pack from transmission and reducing shifting
Brake resistor dissipates excess recaptured energy, reducing brake wear and lowering maintenance costs
Maintaining a constant engine speed of 1600 rpm reduces engine wear and increases fuel efficiency without sacrificing performance
The inverter constantly monitors all energy in the system and determines the most efficient path
Brushless motor and generator provide quieter operation ideal for commercial and residential areas
E-DRIVE ENABLES INCREASED PRODUCTIVITY AND UNIQUE MACHINE FEATURES
The E-Drive delivers similar or better productivity benefits over conventional drive train machines while burning less fuel against machines in its size class and those in the next size class up. Several different features and modes assist 644 X-tier loaders with achieving this productivity across a range of jobsite applications. Whether operators are looking to control engine speed, torque, or idle, there are many John Deere exclusives and unique innovations available to deliver the best user experience.
The Deere 644 X holds its own against loaders within its size class and those in the next size class up, having higher or similar productivity in common applications like Hopper Loading and Stockpiling
The 644 X also averages a 10-13 percent fuel efficiency advantage over the competition meaning that it delivers similar or higher levels of productivity while burning less fuel
Due to the innovative E-Drive system, the 644 X has the fastest acceleration times on both flat terrain and up a standard sloped ramp when compared to competing machines
E-DRIVE FEATURES AND PERFORMANCE MODES
Coast Control enables dynamic braking to slow the machine and reduce fuel consumption compared to machines without this feature. Three setting levels allow the operator to adjust the aggressiveness of machine deceleration with the use of electric brake resistors. When enabled, one pedal controls forward movement as well as dynamic braking.
Normal Mode adjusts engine speed to match load requirements nothing more, nothing less. Engine speed automatically adjusts up to either 1450 or 1600 RPM to meet hydraulic and tractive loads.
Productivity Mode holds engine speed steady at either 1450 or 1600 RPM and is ready to deliver power when needed. Operator does not need to wait for RPM to increase which reduces cycle times and increases productivity compared to normal mode.
Maintaining a constant engine speed reduces engine wear and increases fuel efficiency without sacrificing performance versus running at rated engine speed. Specifically, the 644 X-tier consumes 10 percent less fuel than the 644 P-tier model in hopper loading applications while offering similar productivity.
LEADING IN SUSTAINABILITY THROUGH FUEL AND MAINTENANCE BENEFITS
The 644 X-tier is the most fuel-efficient machine in its size class and in the next size class up meaning that it can move more material while burning less fuel. This allows operations to put more material through the crusher or asphalt plant while burning less fuel, providing most of its sustainability benefits. In addition, its design efficiencies recognize environmental impact reductions to lower carbon emissions and reduce the machines overall environmental impact.
The 644 X burns up to 10 percent less fuel than competitors within its size class and up to 15 percent less fuel than competitors in the next size class up in common applications. These numbers translate into approximately 150,000 kg of CO2 that is prevented from entering the atmosphere over 15,000 machine hours, the equivalent amount of the electricity used by 11 homes over a years time.
Lower volumes of oil and fluids are required when performing recommended preventative maintenance, saving up to 1,700 kg of CO2 over 15,000 hours of operation compared to competitive machines. This is the equivalent of charging around 200,000 cellphones.
Electric Drive components are designed to last in excess of 30,000 hours, meaning they can remain with the machine throughout its entire life without needing to be replaced. This extends the longevity of the machine and lowers the overall manufacturing footprint.
ALL DAY COMFORT IN THE REDESIGNED CAB
The redesigned cab in the John Deere utility loader lineup features improvements that provide the operator with a first-class work environment and a range of creature comfort options to keep them comfortable and productive no matter what task is at hand.
INCREASE THE LOADERS FUNCTIONALITY WITH EH CONTROLS
Electrohydraulic (EH) controls allow operators to customize machine operations based on preference to achieve maximum productivity across a range of jobsite applications.
Enable soft hydraulic stops to select how abrupt the bucket or boom stops when they reach the end of travel or when the lever of the joystick is released
Personalize multi-function buttons 1 and 2 through 10 options within the monitor including bucket vibrate that creates a slight vibrating action for precise control when dumping specific material or EH Precision Mode that allows for fine metering of bucket or boom movement.
Set and store up to 10 different attachment configuration settings including flow, responsiveness, and other modes through the monitor for the most frequently used attachments in your fleet.
REACH HIGHER AND MOVE MORE MATERIAL WITH Z-BAR LINKAGE AND BUCKET IMPROVEMENT
The Z-Bar linkage has been completely redesigned to improve visibility and provide a high degree of parallelism while the upgrades made to the enhanced performance bucket offerings help increase productivity.
Cross tube and boom geometry changes mean improved visibility to front attachments when operating and changing out
Standard 8 degrees of parallelism minimizes load rollback when using forks to improve load leveling
High-Lift linkage adds an additional 12 of hinge pin height over standard linkage
Bucket material retention has been improved by providing a 15 degree increase in bucket rollback to reduce material spillage
Curved side cutters and integrated spill guards improve bucket fill rates
MID-SIZE WHEEL LOADERS
John Deere mid-size wheel loaders will elevate your reach, comfort, and control. With a high-lift option available for all of our mid-size models, these versatile loaders can put more productivity within your reach. More horse means more force our medium loaders range from 124 hp to 264 hp, so that your machine takes you wherever you want to go.
Pick your preference between a single-lever joystick, or two-lever fingertip controls to effortlessly get the job done. Man your machine without removing your hand from the joystick to control two additional functions on the programmable multi-function buttons, such as bucket vibrate and EH precision mode. No matter the job, our L-Series loaders provide more productivity, hands down.
*Availability varies by region. Options not available in every country.
Similar models may be shown in addition to the featured model. Equipment may be shown with options. Specifications are subject to change without prior notice.
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