John Deere Construction & Forestry · Wheel Loader

John Deere 644B Specs

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Overview

The John Deere Construction & Forestry John Deere 644B is a wheel loader listed in the Heavy Equipment Hub equipment database with structured specifications for comparison, research, and machine selection. Key specification points include engine power of 145 hp, operating weight of 28,100 lb, fuel capacity of 56.0 gal and hydraulic capacity of 17.5 gal. This model can be reviewed for loading, stockpile work, material handling, yard operations, and fleet comparison workflows. Use the full specifications table to compare the John Deere Construction & Forestry John Deere 644B against similar wheel loader models by power, weight, capacity, dimensions, speed, and other technical values.

Key Specifications

Operating Weight
28,100
lb

Net Power
145
hp

Gross Power
154
hp

Bucket Capacity - Heaped
2.60
yd3

Full Specifications

41 specs

Dimensions

Breakout Force 24,120 lb / 10,941 kg

Bucket Capacity - Heaped 2.50 yd³ / 1.91 m³

Bucket Capacity - Struck 2.05 yd³ / 1.57 m³

Bucket Width 8.73 ft / 2.66 m

Dump Clearance At Max Raise 9.33 ft / 2.84 m

Ground Clearance 1.66 ft / 0.51 m

Height to Top of Cab 10.63 ft / 3.24 m

Hinge Pin - Max Height 12 ft / 3.66 m

Length With Bucket On Ground 21.10 ft / 6.43 m

Reach At Max Lift And Dump 2.89 ft / 0.88 m

Wheelbase 8.67 ft / 2.64 m

Engine

Alternator Supplied Amperage 42 A

Cooling System Fluid Capacity 12.30 gal / 46.6 L

Displacement 531 cu in / 8.7 L

Engine Make 2240

Engine Oil Fluid Capacity 5.50 gal / 20.8 L

Front Axle/Diff Fluid Capacity 6 gal / 22.7 L

Fuel Capacity 56 gal / 212.0 L

Gross Power 160 hp / 119.3 kW

Hydraulic System Fluid Capacity 17.50 gal / 66.2 L

Max Speed - Forward 25.80 mph / 41.5 km/h

Max Speed - Reverse 10.20 mph / 16.4 km/h

Max Torque 432 lb-ft / 586 Nm

Net Power 145 hp / 108.1 kW

Number of Cylinders 6

Number of Forward Gears 4

Number of Reverse Gears 2

Operating Voltage 12 V

Operating Weight 28,100 lb / 12,746 kg

Power Measured @ 2,200 rpm

Rear Axle Oscillation 22 lb / 10 kg

Rear Axle/Diff Fluid Capacity 6.30 gal / 23.8 L

Static Tipping Weight 22,905 lb / 10,390 kg

Tire Size 14.50 in / 368 mm

Torque Measured @ 1,500 rpm

Transmission Fluid Capacity 9.80 gal / 37.1 L

Turning Radius 15.50 ft / 4.72 m

Hydraulics

Bucket Capacity - Heaped 2.60 yd³ / 1.99 m³

Gross Power 154 hp / 114.8 kW

Pump Flow Capacity 58.20 gal/min / 220.3 L/min

Relief Valve Setting 2,250 psi / 155.1 bar

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Frequently Asked Questions

What is the operating weight of the John Deere Construction & Forestry John Deere 644B? +

The John Deere Construction & Forestry John Deere 644B has an operating weight of 28,100 lb (12,746 kg). This places it in a class suited for wheel loader applications where ground pressure and transport weight are key considerations.

How powerful is the John Deere Construction & Forestry John Deere 644B engine? +

The John Deere Construction & Forestry John Deere 644B produces 160 hp (119.3 kW) of engine power. This output is typical for its weight class and designed to handle demanding Wheel Loader work cycles efficiently.

How does the John Deere Construction & Forestry John Deere 644B compare to similar Wheel Loader models? +

You can compare the John Deere Construction & Forestry John Deere 644B side by side with any other model using the Heavy Equipment Hub compare tool. Key comparison points include engine power, operating weight, digging depth, hydraulic flow, and overall dimensions.