John Deere Construction & Forestry · Wheel Loader

John Deere 644J Z-Bar Specs

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Overview

The John Deere Construction & Forestry John Deere 644J Z-Bar 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 185 hp, operating weight of 40,150 lb, fuel capacity of 93.0 gal and hydraulic capacity of 31.0 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 644J Z-Bar against similar wheel loader models by power, weight, capacity, dimensions, speed, and other technical values.

Key Specifications

Operating Weight
40,150
lb

Net Power
185
hp

Bucket Capacity - Heaped
4.25
yd3

Full Specifications

43 specs

Dimensions

Breakout Force 34,407 lb / 15,607 kg

Bucket Capacity - Heaped 4.25 yd³ / 3.25 m³

Bucket Capacity - Struck 3.70 yd³ / 2.83 m³

Bucket Width 9.50 ft / 2.90 m

Dump Clearance At Max Raise 9.67 ft / 2.95 m

Ground Clearance 1.42 ft / 0.43 m

Height to Top of Cab 11.17 ft / 3.40 m

Hinge Pin - Max Height 13.58 ft / 4.14 m

Length With Bucket On Ground 26.42 ft / 8.05 m

Reach At Max Lift And Dump 3.67 ft / 1.12 m

Wheelbase 10.50 ft / 3.20 m

Width Over Tires 9.43 ft / 2.87 m

Engine

Alternator Supplied Amperage 80 A

Cooling System Fluid Capacity 7.80 gal / 29.5 L

Displacement 414 cu in / 6.8 L

Engine Make 2240

Engine Model 6068H

Engine Oil Fluid Capacity 6.50 gal / 24.6 L

Front Axle/Diff Fluid Capacity 5.90 gal / 22.3 L

Fuel Capacity 93 gal / 352.0 L

Hydraulic System Fluid Capacity 31 gal / 117.3 L

Max Speed - Forward 22 mph / 35.4 km/h

Max Speed - Reverse 15.50 mph / 24.9 km/h

Max Torque 749 lb-ft / 1,016 Nm

Net Power 185 hp / 138.0 kW

Number of Cylinders 6

Number of Forward Gears 4

Number of Reverse Gears 3

Operating Voltage 24 V

Operating Weight 40,150 lb / 18,212 kg

Power Measured @ 2,200 rpm

Rear Axle Oscillation 26 lb / 12 kg

Rear Axle/Diff Fluid Capacity 5.90 gal / 22.3 L

Static Tipping Weight 34,379 lb / 15,594 kg

Torque Measured @ 1,400 rpm

Torque Rise 55 lb-ft / 75 Nm

Transmission Fluid Capacity 7.10 gal / 26.9 L

Turning Radius 18 ft / 5.49 m

Hydraulics

Dump Time 1.40 sec

Lower Time 3 sec

Pump Flow Capacity 68 gal/min / 257.4 L/min

Raise Time 6.20 sec

Relief Valve Setting 3,600 psi / 248.2 bar

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Frequently Asked Questions

What is the operating weight of the John Deere Construction & Forestry John Deere 644J Z-Bar? +

The John Deere Construction & Forestry John Deere 644J Z-Bar has an operating weight of 40,150 lb (18,212 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 644J Z-Bar engine? +

The John Deere Construction & Forestry John Deere 644J Z-Bar produces 185 hp (138.0 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 644J Z-Bar compare to similar Wheel Loader models? +

You can compare the John Deere Construction & Forestry John Deere 644J Z-Bar 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.