Among the key figures for the John Deere Construction 644 B Wheel Loader (1978-2021) are below-average engine power at 160 hp (119 kW) and low weight at 29,425 lb (13.3 t). Its published maximum bucket capacity is 3.01 yd³ (2.3 m³).
Specification profile
Wheel Loader • 1978-2021
Weight: 29,425 lb (13.3 t)Engine power: 160 hp (119 kW)Maximum bucket capacity: 3.01 yd³ (2.3 m³)Minimum bucket capacity: 2.49 yd³ (1.9 m³)
29,425 lb (13.3 t)Weight
160 hp (119 kW)Engine power
3.01 yd³ (2.3 m³)Maximum bucket capacity
2.49 yd³ (1.9 m³)Minimum bucket capacity
25.8 mph (41.5 km/h)Travel speed
432 lb-ft (586 Nm)Maximum torque
8.73 ft (2.66 m)Bucket width
9.81 ft (2.99 m)Transport height
How it compares
Low, average or high?
Engine power
Below average
160 hp (119 kW)
Low 44.3 hp (33 kW)Typical 212 hp (158 kW)High 814 hp (607 kW)
Engine power is below the typical figure.
Weight
Low
29,425 lb (13.3 t)
Low 7,419 lb (3.37 t)Typical 43,268 lb (19.6 t)High 210,541 lb (95.5 t)
Weight is well below the typical figure.
Maximum bucket capacity
Low
3.01 yd³ (2.3 m³)
Low 1.05 yd³ (0.8 m³)Typical 5.37 yd³ (4.11 m³)High 17 yd³ (13 m³)
Maximum bucket capacity is well below the typical figure.
Minimum bucket capacity
Low
2.49 yd³ (1.9 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 well below the typical figure.
Travel speed
Above average
25.8 mph (41.5 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
Low
432 lb-ft (586 Nm)
Low 107 lb-ft (145 Nm)Typical 732 lb-ft (992 Nm)High 2,104 lb-ft (2,852 Nm)
Maximum torque is well below the typical figure.
Visual overview
Key measurements
Capacity
Published capacity figures shown together for quick comparison.
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 B |
| Category | Wheel Loader |
| Model year / production | 1978-2021 |
Full specifications
Technical details
Performance
Engine power160 hp (119 kW)
Maximum torque432 lb-ft (586 Nm)
Travel speed25.8 mph (41.5 km/h)
Dimensions
Bucket width8.73 ft (2.66 m)
Transport height9.81 ft (2.99 m)
Transport length21.1 ft (6.42 m)
Capacity & weight
Maximum bucket capacity3.01 yd³ (2.3 m³)
Minimum bucket capacity2.49 yd³ (1.9 m³)
Weight29,425 lb (13.3 t)
Swing loaderNo
Engine & drivetrain
Cylinder bore × stroke120×127 mm
Displacement2.3 US gal (8.7 L)
Engine manufacturerJohn Deere
Number of cylinders6.0
Setup & fitment
Hydraulic quick hitchNo
Mechanical quick hitchNo
Standard tyres17.5R25EM
Features
Air conditioningNo
Diesel particulate filterNo
TelescopicNo
Other specifications
Model seriesB
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