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Current number of specifications

 
John Deere 644K High-Lift Wheel Loader

Selected Dimensions

Bucket
G. Dump Clearance at Max Raise10.8 ft in3280 mm
Dimensions
A. Length with Bucket on Ground28.2 ft in8610 mm
B. Width Over Tires9.4 ft in2875 mm
C. Height to Top of Cab11.1 ft in3380 mm
D. Wheelbase10.7 ft in3260 mm
E. Ground Clearance1.3 ft in408 mm
F. Hinge Pin - Max Height14.7 ft in4490 mm
H. Reach at Max Lift and Dump3.7 ft in1120 mm

Specification

Engine
MakeJohn Deere
Model6068H, Tier III certified
Net Power232 hp173 kw
Power Measured @1700 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 Weight40798.7 lb18506 kg
Fuel Capacity93 gal352 L
Hydrauilc System Fluid Capacity29.1 gal110 L
Engine Oil Fluid Capacity6.5 gal24.5 L
Cooling System Fluid Capacity7.8 gal29.5 L
Transmission Fluid Capacity6.1 gal23 L
Front Axle/Diff Fluid Capacity5.8 gal22 L
Rear Axle/Diff Fluid Capacity5.8 gal22 L
Static Tipping Weight26958.1 lb12228 kg
Turning Radius18.3 ft in5570 mm
Operating Voltage24 V
Alternator Supplied Amperage80 amps
Rear Axle Oscillation26 degrees
Tire Size23.5 R25
Transmission
TypeCountershaft, powershift
Number of Forward Gears4
Number of Reverse Gears3
Max Speed - Forward22.7 mph36.6 km/h
Max Speed - Reverse15.5 mph24.9 km/h
Hydraulic System
Pump TypeVariable axial piston
Relief Valve Pressure3650 psi25165.8 kPa
Pump Flow Capacity81.9 gal/min310 L/min
Raise Time5.5 sec
Dump Time1.4 sec
Lower Time3 sec
Bucket
Breakout Force30384 lb135.2 kN
Dump Clearance at Max Raise10.8 ft in3280 mm
Bucket Width10 ft in3040 mm
Bucket Capacity - heaped4.3 yd33.2 m3
Bucket Capacity - struck3.7 yd32.8 m3
Dimensions
Length with Bucket on Ground28.2 ft in8610 mm
Width Over Tires9.4 ft in2875 mm
Height to Top of Cab11.1 ft in3380 mm
Ground Clearance1.3 ft in408 mm
Wheelbase10.7 ft in3260 mm
Hinge Pin - Max Height14.7 ft in4490 mm
Reach at Max Lift and Dump3.7 ft in1120 mm