In specification terms, the John Deere Construction 644 G Wheel Loader (2022-2026) shows typical engine power at 227 hp (169 kW) alongside typical weight at 40,135 lb (18.2 t). Its published maximum bucket capacity is 4.19 yd³ (3.2 m³).
Specification profile
Wheel Loader • 2022-2026
Weight: 40,135 lb (18.2 t)Engine power: 227 hp (169 kW)Maximum bucket capacity: 4.19 yd³ (3.2 m³)Minimum bucket capacity: 4.05 yd³ (3.1 m³)
40,135 lb (18.2 t)Weight
227 hp (169 kW)Engine power
4.19 yd³ (3.2 m³)Maximum bucket capacity
4.05 yd³ (3.1 m³)Minimum bucket capacity
24 mph (38.7 km/h)Travel speed
1,800 rpmEngine speed at max torque
724 lb-ft (981 Nm)Maximum torque
9.97 ft (3.04 m)Transport width
How it compares
Low, average or high?
Engine power
Average
227 hp (169 kW)
Low 44.3 hp (33 kW)Typical 212 hp (158 kW)High 814 hp (607 kW)
Engine power is close to the typical figure.
Weight
Average
40,135 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 mph (38.7 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
724 lb-ft (981 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 conditioningYES
Diesel particulate filterYES
Hydraulic quick hitchNO
Mechanical quick hitchNO
Swing loaderNO
TelescopicNO
Overview
Model information
| Manufacturer | John Deere Construction |
|---|---|
| Model | 644 G |
| Category | Wheel Loader |
| Model year / production | 2022-2026 |
Full specifications
Technical details
Performance
Engine power227 hp (169 kW)
Maximum torque724 lb-ft (981 Nm)
Engine speed at max torque1,800 rpm
Travel speed24 mph (38.7 km/h)
Dimensions
Bucket width9.97 ft (3.04 m)
Maximum discharge height13.5 ft (4.13 m)
Transport height11.4 ft (3.46 m)
Transport length26.8 ft (8.17 m)
Transport width9.97 ft (3.04 m)
Outside turning radius18.2 ft (5.55 m)
Capacity & weight
Maximum bucket capacity4.19 yd³ (3.2 m³)
Minimum bucket capacity4.05 yd³ (3.1 m³)
Weight40,135 lb (18.2 t)
Swing loaderNo
Engine & drivetrain
Displacement1.8 US gal (6.8 L)
Emission levelEPA Tier 4 / EU Stage V
Engine manufacturerJohn Deere
Engine typePowerTech PVS 6068H
Number of cylinders6.0
Setup & fitment
Hydraulic quick hitchNo
Mechanical quick hitchNo
Standard tyres23.5 R25
Features
Air conditioningYes
Diesel particulate filterYes
TelescopicNo
Other specifications
Model seriesG
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