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John Deere

644J Z-Bar

Wheel Loader

Operating Weight
40,150 lb
Bucket Capacity - heaped
4.30 yd³
Net Power
185.0 hp
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John Deere 644J Z-Bar Wheel Loader
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Specifications

45 data points

Operating Specifications

Operating Specifications specifications
Operating Weight40,150 lb
Fuel Capacity93.0 gal
Tire Size23.5 R25
Hydraulic System Fluid Capacity31.0 gal
Static Tipping Weight34,379 lb
Operating Voltage24 V
Turning Radius216 in
Engine Oil Fluid Capacity6.5 gal
Rear Axle Oscillation26 °
Alternator Supplied Amperage80 A
Front Axle/Diff Fluid Capacity5.9 gal
Rear Axle/Diff Fluid Capacity5.9 gal
Cooling System Fluid Capacity7.8 gal
Transmission Fluid Capacity7.1 gal

Engine

Engine specifications
Engine Model6068H
Displacement414 in³
Power Measured @2,200 rpm
Net Power185.0 hp
Number of Cylinders6
AspirationTurbocharged charge air cooled
Torque Measured @1,400 rpm
Torque Rise55.0 %

Hydraulic System

Hydraulic System specifications
Pump Flow Capacity68.0 gal/min
Raise Time6.2 s
Lower Time3.0 s
Dump Time1.4 s
Relief Valve Setting3,600 psi
Pump TypeVariable axial piston

Dimensions

Dimensions specifications
Ground Clearance18 in
Height - Top of Cab134 in
Wheelbase126 in
Width Over Tires114 in
Reach at Max Lift and Dump44 in
Length with Bucket on Ground318 in
Hinge Pin - Max Height163 in

Transmission

Transmission specifications
Max Speed - Forward22.0 mph
Max Speed - Reverse15.5 mph
Transmission TypeAutomatic powershift
Number of Forward Gears4
Number of Reverse Gears3

Bucket

Bucket specifications
Bucket Capacity - heaped4.30 yd³
Bucket Capacity - struck3.70 yd³
Dump Clearance at Max Raise117 in
Breakout Force34,407 lb
Bucket Width114 in

Comparable machines

Other wheel loaders in a similar weight class.