Construction Equipment Online > Wheel Loader > DEEREWheel Loader > DEERE 644K Hybrid Wheel Loader Wheel Loaders
DEERE 644K Hybrid Wheel Loader Wheel Loaders

DEERE 644K Hybrid Wheel Loader Wheel Loaders

Model 644K Hybrid Wheel Loader
Engine Net Power 171 kW (229 hp)
Operating Weight 18,341 kg (40,436 lb.)
Bucket Capacity 3.12–3.2 m³ (4.0-4.25 cu. yd.)
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Engine

Our FT4/Stage IV diesels delivers generous displacement, power, and lugging ability.

Ash-service intervals for the diesel particulate filter (DPF) are condition based, so changing it may not be necessary until the first engine overhaul. Intervals can be extended further depending on application, regular maintenance practices, and the use of recommended fluids and lubricants.

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.

Optional programmable fan reverses, ejecting debris from radiator and cooler cores.

Transmission and Axles

With ride control, the lift cylinders act as shock absorbers, cushioning bumps to allow these loaders to navigate rough ground more quickly without losing their loads.

Automatic differential lock engages as soon as a tire begins to slip. It's ideal for inexperienced operators or applications requiring high traction, such as stockpiling silage, plowing snow, and handling pipe.

Maintenance

Lockable compartment swings open wide, offering convenient ground-level access to remote-start battery terminals and the electrical-disconnect switch.

Conveniently located, easy-to-read sight gauges and see-through reservoirs let you check transmission, hydraulic, coolant, and windshield washer fluid levels at a glance.

Controls

Choose single-lever joystick or two-lever fingertip pilot-operated hydraulic controls.

Optional joystick steering is ideal for V-pattern truck loading.

Versatility

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

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

DRIVELINE

Engine Manufacturer John Deere
Engine Model PowerTech PSX 6068
Emission Rating Interim Tier 4
Displacement, ltr (Inches³) 6.8 (414)
Rated Speed, rpm 1700
Engine Output - Net, kW (hp) 171 (229)
Torque, Nm (lbf / ft) 991 (730)
Torque Rise, % 19
Transmission Type Powershift w/Hybrid-Electric Drive
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)) 106 (28)
Axle - Front, ltr (gallons (US)) 22 (5.75)
Axle - Rear, ltr (gallons (US)) 22 (5.75)
Transmission, ltr (gallons (US)) 37.9 (10)
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 100
Pump Type Piston
Pump Flow, lt/min (gallons (US) / min) 297 (78)
System Pressure, bar (PSI) 251.66 (3650)

WEIGHTS

Operating Weight, kg (lbs) 18341 (40435)

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