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John Deere 644K High-Lift Wheel Loader

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General Specifications

Bucket

Breakout Force30,384 lbs (13,782 kg)
Bucket Capacity - heaped4 cu yd (3 cu m)
Bucket Capacity - struck4 cu yd (3 cu m)
Bucket Width10 ft (3 m)
Dump Clearance at Max Raise11 ft (3 m)

Dimensions

Ground Clearance1 ft (0 m)
Height - Top of Cab11 ft (3 m)
Hinge Pin - Max Height15 ft (5 m)
Length with Bucket on Ground28 ft (9 m)
Reach at Max Lift and Dump4 ft (1 m)
Wheelbase11 ft (3 m)
Width Over Tires10 ft (3 m)

Engine

AspirationTurbocharged charge air cooled
Displacement414 cu in (6,784 cu cm)
Engine Model6068H Tier III certified
Net Power232 hp (173 kw)
Number of Cylinders6
Power Measured @1700 rpm
Torque Measured @1400 rpm
Torque Rise55%

Hydraulic System

Dump Time1.4 seconds
Lower Time3 seconds
Pump Flow Capacity82 gpm (310 lpm)
Pump TypeVariable axial piston
Raise Time5.5 seconds
Relief Valve Setting3650 psi

Operating Specifications

Alternator Supplied Amperage80 amps
Cooling System Fluid Capacity8 gal (30 l)
Engine Oil Fluid Capacity7 gal (25 l)
Front Axle/Diff Fluid Capacity6 gal (22 l)
Fuel Capacity93 gal (352 l)
Hydraulic System Fluid Capacity29 gal (110 l)
Operating Voltage24 volts
Operating Weight40,799 lbs (18,506 kg)
Rear Axle Oscillation26 degrees
Rear Axle/Diff Fluid Capacity6 gal (22 l)
Static Tipping Weight26,958 lbs (12,228 kg)
Tire Size23.5 R25
Transmission Fluid Capacity6 gal (23 l)
Turning Radius18 ft (6 m)

Transmission

Max Speed - Forward23 mph (37 kph)
Max Speed - Reverse16 mph (25 kph)
Number of Forward Gears4
Number of Reverse Gears3
Transmission TypeCountershaft powershift