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Current number of specifications

 
John Deere 644J High-lift Wheel Loader

Selected Dimensions

Bucket
G. Dump Clearance at Max Raise11.1 ft in3380 mm
Dimensions
A. Length with Bucket on Ground28 ft in8530 mm
C. Height to Top of Cab11.2 ft in3400 mm
D. Wheelbase10.5 ft in3200 mm
E. Ground Clearance1.5 ft in460 mm
F. Hinge Pin - Max Height15 ft in4570 mm
H. Reach at Max Lift and Dump3.8 ft in1170 mm

Specification

Engine
MakeJohn Deere
Model6068H
Net Power185 hp138 kw
Power Measured @2200 rpm
Displacement414 cu in6.8 L
Torque Measured @1400 rpm
Number of Cylinders6
Max Torque749 lb ft1016 Nm
Torque Rise55 %
AspirationTurbocharged charge air cooled
Operational
Operating Weight40620 lb18425 kg
Fuel Capacity93 gal352 L
Hydrauilc System Fluid Capacity31 gal117 L
Engine Oil Fluid Capacity6.5 gal24.5 L
Cooling System Fluid Capacity7.8 gal29.5 L
Transmission Fluid Capacity7 gal26.5 L
Front Axle/Diff Fluid Capacity5.8 gal22 L
Rear Axle/Diff Fluid Capacity5.8 gal22 L
Static Tipping Weight27689 lb12560 kg
Turning Radius18 ft in5.5 mm
Operating Voltage24 V
Alternator Supplied Amperage80 amps
Rear Axle Oscillation24 degrees
Tire Size23.5 R25
Transmission
TypeAutomatic Powershift
Number of Forward Gears4
Number of Reverse Gears3
Max Speed - Forward22 mph35.4 km/h
Max Speed - Reverse15.5 mph25 km/h
Hydraulic System
Pump TypeVariable axial piston
Relief Valve Pressure3600 psi24800 kPa
Pump Flow Capacity68 gal/min257 L/min
Raise Time5.9 sec
Dump Time1.9 sec
Lower Time2.8 sec
Bucket
Breakout Force30574 lb136 kN
Dump Clearance at Max Raise11.1 ft in3380 mm
Bucket Width9.8 ft in2971.8 mm
Bucket Capacity - heaped4 yd33 m3
Dimensions
Length with Bucket on Ground28 ft in8530 mm
Height to Top of Cab11.2 ft in3400 mm
Ground Clearance1.5 ft in460 mm
Wheelbase10.5 ft in3200 mm
Hinge Pin - Max Height15 ft in4570 mm
Reach at Max Lift and Dump3.8 ft in1170 mm