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644K Wheel Loader John Deere

644K Wheel Loader

644K Wheel Loader John Deere

  • Net Power: 173 kW (232 hp) @ 1,700 rpm
  • Bucket Capacity: 3.1–3.2 m³ (4.0–4.25 cu. yd.)
  • Operating Weight: 18 682 kg (41 188 lb)

Features

Engine

644K Hybrid delivers up to 25-percent better average fuel efficiency than its conventional IT4 counterpart with a lockup torque converter. In applications such as V-pattern truck loading, fuel savings will be even larger.

EPA IT4/EU Stage IIIB 6.8-L diesel runs at a constant 900, 1,200, 1,500, or 1,800 rpm. Constant speed reduces engine wear, noise levels, and fuel consumption. Top speed provides maximum power and productivity, while the slower settings increase efficiency.

Hybrid-Electric Drive

Hybrid-electric drive smoothly and efficiently recaptures energy to slow the loader when the operator lets off the accelerator. This lessens the load on the engine and reduces fuel consumption.

Nevergrease™ Pin Joints

The NeverGrease™ option includes a pin-joint system for the linkage and boom joints that eliminates greasing, extends pin-joint life, and provides consistent life across the system.

Quad-Cool™

Quad-Cool places the radiator, air-conditioner condenser, intercooler, and hydraulic, transmission, and optional axle coolers in a unique boxed configuration that's isolated from engine heat.

Transmission

PowerShift™ transmission provides smooth moves through four forward speed ranges.

Maintenance

All daily service points, including fuel, are grouped on the left side for quick and convenient ground-level access. Sight gauges enable quick fluid-level checks.

Versatility

Equip your loader with optional Z-Bar, High Lift, Tool Carrier, or Parallel Lift linkages.

Worksite Pro couplers make attachment switchover easy to get even more out of your machine.

Safety & Security

Sealed-switch module keeps out dust and moisture while eliminating nearly 100 wires. Prevent unauthorized machine operation with keyless-start requiring a numeric pass code.

Optional rearview camera and radar object-detection system

Specifications

DRIVELINE

Engine Manufacturer John Deere      
Engine Model PowerTech PSS 6090      
Emission Rating Tier 4      
Displacement, ltr (Inches³) 9 (548)      
Rated Speed, rpm 1700      
Engine Output - Net, kW (hp) 173 (232)      
Torque, Nm (lbf / ft) 1062 (783)      
Torque Rise, % 56      
Transmission Type Powershift      
Front Differential Type Locking      
Rear Differential Type Open      
Tire size - Standard 23.5 R25      
Service Brake - Type Wet Disc      
Service Brake - Location Axle Inboard      
Service Brake - Actuation Hydraulic      
Parking Brake - Type Wet Multi Disc - Transmission      

DIMENSIONS

Height - Over Cab, mm (ft/in) 3430 (11 ft 3 in)      
Wheelbase, mm (ft/in) 3260 (10 ft 8 in)      
Length - Including Bucket, mm (ft/in) 8300 (27 ft 3 in)      
Ground clearance, mm (inches) 461 (18.1)      
Width Over tires - Std, mm (ft/in) 2875 (9 ft 5 in)      
Height - Pivot Pin, mm (ft/in) 4120 (13 ft 6 in)      
Reach - At 2130mm 45° Dump, mm (ft/in) 1610 (5 ft 3 in)      
Turning Circle - Maximum, mm (ft/in) 13280 (43 ft 7 in)      

CAPACITIES

Fuel Tank, ltr (gallons (US)) 397 (105)      
Hydraulic Tank, ltr (gallons (US)) 105.2 (6.95)      
Axle - Front, ltr (gallons (US)) 22 (5.75)      
Axle - Rear, ltr (gallons (US)) 22 (5.75)      
Transmission, ltr (gallons (US)) 23 (6)      
Heaped Capacity, m³ (yd³) 3.2 (4.25)      
Bucket Capacity - Smallest, m³ (yd³) 3.1 (4)      
Largest bucket capacity, m³ (yd³) 3.2 (4.25)      
Breakout - Bucket , kgf (lbf) 15378 (33903)      
Ride Control System Optional      
System Voltage, V 24      
Alternator Output, Amp 130      
Pump Type Piston      
Pump Flow, lt/min (gallons (US) / min) 297 (78)      
System Pressure, bar (PSI) 251.66 (3650)      

WEIGHTS

Operating Weight, kg (lbs) 18682 (41188)      

COMPARABLE BUILD

Dump Height, mm (ft/in) 2910 (9 ft 7 in)      
Reach at Full Height, mm (ft/in) 1060 (3 ft 6 in)      
Tipping Load - Straight, kg (lbs) 14771 (32565)
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Fenton, MO

200 Erb Industrial Dr.
Fenton, MO 63026
636-349-0200

Foristell, MO

21000 Veterans Memorial Pkwy
Foristell, MO 63348
636-463-2500

Mt. Vernon, IL

11322 State Rt 148
Mt. Vernon, IL 62864
618-244-6800

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1421 South West End Blvd.
Cape Girardeau, MO 63703
573-334-0563

Paducah, KY

6115 US Highway 45 South
Paducah, KY 42002
270-554-1131

Cuba, MO

6885 Old Route 66
Cuba, MO 65453
573-885-0500

Owensboro, KY

315 Worthington Rd.
Owensboro, KY 42301
270-684-2339

Evansville, IN

9800 Indiana 57
Evansville, IN 47725
812-473-0484