The John Deere Construction 644 K Wheel Loader (2010-2021) combines above-average engine power at 232 hp (173 kW) with typical weight at 40,036 lb (18.2 t). The listed maximum bucket capacity is 4.19 yd³ (3.2 m³).
Specification profile
Wheel Loader • 2010-2021
Weight: 40,036 lb (18.2 t)Engine power: 232 hp (173 kW)Maximum bucket capacity: 4.19 yd³ (3.2 m³)Minimum bucket capacity: 4.05 yd³ (3.1 m³)
40,036 lb (18.2 t)Weight
232 hp (173 kW)Engine power
4.19 yd³ (3.2 m³)Maximum bucket capacity
4.05 yd³ (3.1 m³)Minimum bucket capacity
24.9 mph (40 km/h)Travel speed
749 lb-ft (1,016 Nm)Maximum torque
9.42 ft (2.87 m)Transport width
9.84 ft (3 m)Bucket width
How it compares
Low, average or high?
Engine power
Above average
232 hp (173 kW)
Low 44.3 hp (33 kW)Typical 212 hp (158 kW)High 814 hp (607 kW)
Engine power is above the typical figure.
Weight
Average
40,036 lb (18.2 t)
Low 7,419 lb (3.37 t)Typical 43,268 lb (19.6 t)High 210,541 lb (95.5 t)
Weight is close to the typical figure.
Maximum bucket capacity
Below average
4.19 yd³ (3.2 m³)
Low 1.05 yd³ (0.8 m³)Typical 5.37 yd³ (4.11 m³)High 17 yd³ (13 m³)
Maximum bucket capacity is below the typical figure.
Minimum bucket capacity
Above average
4.05 yd³ (3.1 m³)
Low 0.78 yd³ (0.6 m³)Typical 3.71 yd³ (2.84 m³)High 12.4 yd³ (9.5 m³)
Minimum bucket capacity is above the typical figure.
Travel speed
Above average
24.9 mph (40 km/h)
Low 12 mph (19.3 km/h)Typical 21.4 mph (34.4 km/h)High 26.7 mph (43 km/h)
Travel speed is above the typical figure.
Maximum torque
Average
749 lb-ft (1,016 Nm)
Low 107 lb-ft (145 Nm)Typical 732 lb-ft (992 Nm)High 2,104 lb-ft (2,852 Nm)
Maximum torque is close to the typical figure.
Visual overview
Key measurements
Capacity
Published capacity figures shown together for quick comparison.
Working dimensions
Useful working and clearance measurements shown side by side.
Overall size
The main published dimensions shown together at a glance.
Equipment
Features & equipment
Published equipment and feature availability for this model.
Air conditioningNO
Diesel particulate filterNO
Hydraulic quick hitchNO
Mechanical quick hitchNO
Swing loaderNO
TelescopicNO
Overview
Model information
| Manufacturer | John Deere Construction |
|---|---|
| Model | 644 K |
| Category | Wheel Loader |
| Model year / production | 2010-2021 |
Full specifications
Technical details
Performance
Engine power232 hp (173 kW)
Maximum torque749 lb-ft (1,016 Nm)
Travel speed24.9 mph (40 km/h)
Dimensions
Bucket width9.84 ft (3 m)
Transport height11.3 ft (3.43 m)
Transport length26.6 ft (8.1 m)
Transport width9.42 ft (2.87 m)
Outside turning radius18.3 ft (5.57 m)
Capacity & weight
Maximum bucket capacity4.19 yd³ (3.2 m³)
Minimum bucket capacity4.05 yd³ (3.1 m³)
Weight40,036 lb (18.2 t)
Swing loaderNo
Engine & drivetrain
Displacement1.8 US gal (6.8 L)
Engine manufacturerJohn Deere
Engine type6068H
Number of cylinders6.0
Setup & fitment
Hydraulic quick hitchNo
Mechanical quick hitchNo
Standard tyres23.5 R25
Features
Air conditioningNo
Diesel particulate filterNo
TelescopicNo
Other specifications
Model seriesK
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