DEERE - 644 G-TIER Back

DEERE 644 G-TIERMID-SIZE WHEEL LOADERS

NO NONSENSE.
The dependable, economical 644 G-Tier is all business. From stockpiling and truck or hopper loading, to short load-and-carry tasks and material handling, this mid-size wheel loaders got you covered. Its lower initial acquisition cost doesnt mean you have to sacrifice quality and support. The 644 G-Tier delivers the rugged reliability and ease of operation you expect from John Deere a company with over a half-century of experience designing and manufacturing exceptional wheel loaders.

PROVEN DESIGN AND RELIABILITY
The John Deere 644 G-Tier leverages components and technology featured in both our current and former series loaders for decades. Powertrain, hydraulic, and electrical systems are the culmination of thousands of hours of proven experience in the field.

MINIMAL MAINTENANCE AND OPERATING COSTS
Extended service intervals plus parts and fluid costs over 12,000 hours of usage are as much as 14-percent lower than the nearest competitor.*

PEACE OF MIND
Renowned John Deere and dealer support, parts availability, and warranty help keep customers up and running.

*Based on manufacturers required scheduled maintenance events through 12,000 hours of service as of August 2020. Calculated using August 2020 manufacturers suggested list pricing for OEM parts and fluids in U.S. dollars. Labor costs not included.

STREAMLINED SERVICING
All daily service points including fuel are conveniently grouped on the left side of the machine at ground level, for easy access. Hinged doors provide wide-open access to the engine, the cooling system, and other components. Cooling package is isolated from the engine compartment, so the fan pulls fresh air that is not preheated through the coolers.

MAXIMIZE JOBSITE VERSATILITY
In addition to current P- and X-Tier options, the coupler accepts buckets and attachments dating to K-Series Loaders to help maximize machine utilization and fleet versatility.

CAB COMFORT
Roomy cab features ergonomically placed joystick controls, foot pedals, and sealed-switch module. Seatmounted right-hand joystick includes integrated F-N-R switch. Optional air-ride seat increases the level of operator comfort.

USER-FRIENDLY CONTROL
The 644 G-Tier features common controls that will be familiar to both novice and experienced operators. Optional front-differential lock provides additional traction in muddy or loose-material conditions. Pilot controls are intuitive to operate. In-cab adjustable boom-height kickout and return to carry as well as return to dig can be easily activated from the convenient touchpad, speeding production in repetitive applications

CONNECTED MACHINES
John Deere construction equipment comes with in-base connectivity free from subscriptions or annual renewals. Analyze critical machine data, track utilization, review diagnostic alerts, and more from the John Deere Operations Center. The Operations Center also enables John Deere Connected Support, which uses data from thousands of connected machines to proactively address issues before they arise. With your approval, your dealer can also remotely monitor machine health, diagnose problems, and even update machine software without a trip to the jobsite.*

*Availability varies by region and product. Options not available in every country.

KEEP FREE OF DEBRIS
Optional programmable fan automatically reverses at predetermined intervals to keep coolers clean throughout the day. Or run individual cleaning cycles through the monitor.

ADDITIONAL EQUIPMENT
ENGINE
Wet-sleeve cylinder liners
Programmable auto-idle and auto shutdown
Starter excessive-cranking protection
Automatic engine cool-down timer
Automatic derating for exceeded system temperatures
Serpentine drive belt for automatic tensioner
Electrical fuel-priming pump
Dual-stage fuel filter and water separator
500-hour vertical spin-on oil filter
Automatic glow plugs for cold start
Engine-block heater (recommended for cold starts below 23 deg. C [10 deg. F]) (Optional)
Centrifugal engine air pre-cleaner (Optional)

POWERTRAIN
Clutch cutoff with 3 operator settings: Level ground, small slope, or steep slope
Clutch calibration engaged from monitor
2,000-hour vertical spin-on transmission filter
Transmission fill tube and sight gauge
Transmission diagnostic ports
4-speed transmission with non-lockup torque converter
Front locking differential
Brake retractors and adjusters

COOLING SYSTEM
Isolated from engine compartment
Engine radiator
Engine oil cooler
Hydraulic oil cooler (oil to air)
Transmission oil cooler (oil to air)
Charge air cooler (air to air)
Fuel cooler
Coolant recovery tank
Antifreeze, 47 deg. C (52 deg. F)
Cool-on-demand, hydraulically driven, swing-out fan
Enclosed fan safety guard
Automatic reversing fan drive (Optional)

HYDRAULICS
Pilot hydraulic controls
Automatic return-to-dig bucket positioner
In-cab adjustable automatic boom-height kickout/return to carry
Reservoir with sight gauge and fill strainer
Hydraulic diagnostic ports
4,000-hour in-tank filter
2 function joystick with F-N-R
2 function 2-lever fingertip controls and steering column F-N-R (Optional)
3 function joystick with F-N-R and 3rd-function auxiliary lever (Optional)
Ride control, automatic with monitor-adjustable speed settings (Optional)
Hydraulic control system for quick-coupler locking pins (Optional)
Hydrau XR cold-temperature hydraulic fluid recommended below -25 deg. C (-13 deg. F)

STEERING SYSTEMS
Conventional steering wheel with spinner knob
Secondary steering (Optional)

ELECTRICAL
Solid-state electrical power-distribution system
Lockable master electrical-disconnect switch
Battery-terminal safety covers
By-pass start safety cover at starter
Pre-wired for beacon/strobe light
Lights: Halogen driving lights with guards (2) / Front (2), rear cab (2) / Halogen front turn signals and flashers / LED stop- and taillights
Halogen rear grille work lights (2) (Optional)
Horn, electric
Reverse warning alarm
Multifunction/multi-language 127-mm (5 in.) LCD color monitor includes: Digital instruments Analog display (hydraulic oil temperature, engine coolant temperature, transmission oil temperature, and engine oil pressure) / Digital display (engine rpm, transmission gear/direction indicator, hour meter, fuel level, DEF level, speedometer, odometer, and average fuel consumption)
Indicator lights: Standard and selected options / Amber caution and red stop
Operator-warning messages
Built-in diagnostics: Diagnostic-code details / Sensor values / Calibrations / Individual circuit tester
Radio ready
AM/FM radio
24- to 12-volt, 15-amp converter and cab power ports

OPERATORS STATION
Cab with air conditioning/heater (ROPS/FOPS Level 2, isolation mounted)
Keyless start with multiple security modes
Sealed-switch module with function indicators
Seat with headrest extension, fabric cover, and adjustable mechanical suspension
Seat with backrest extension, deep foam, fabric cover, and adjustable air suspension (Optional)
High-visibility, bright-orange seat belt, 76 mm (3 in.), with retractor
Cup holder
Coat hook
Dome and reading light
Rubber floor mat
Tilt steering column
Operators manual storage compartment
Outside (2) and inside (1) rearview mirrors
Heated outside mirrors with convex lens (Optional)
Left-side operator-station access
Slip-resistant steps and ergonomic handholds
Pull-down front sun visor
Front and rear intermittent windshield wipers and washers
Rearview camera
Fire extinguisher (Optional)

LOADER LINKAGE
Z-Bar loader linkage

BUCKETS AND ATTACHMENTS
Full line of Deere pin-on buckets, coupler buckets, and forks (Optional)
Hi-Vis hydraulic coupler that accepts Euro-pattern attachments (ISO) (Optional)

OVERALL VEHICLE
JDLink wireless communication system (available in specific countries; see your dealer for details)
Front and rear tie-downs
Rear counterweight with hitch and locking pin
Articulation locking bar
Loader boom service locking bar
40-deg. steering articulation to each side with rubber-cushion stops on frame
Vandal protection with lockable engine enclosures, counterweight compartments, and filler access for radiator/fuel/DEF/ hydraulic transmission
Left-side service steps and handholds
Right-side service steps and handrails (Optional)
Fuel-tank fill strainer
Ground-level fuel and DEF fill
Same-side ground-level daily servicing
23.5R25 radial tires on 3-piece rims
23.5-25 bias tires on 3-piece rims (Optional)
Fenders, front narrow
Fenders, front and rear full width (Optional)
Transmission side-frame and bottom guards (Optional)
Lift eyes (Optional)
License-plate bracket and light (Optional)

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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