John Deere 644K High-Lift Wheel Loader

Bucket

Breakout Force 30,384 lbs (13,782 kg)
Bucket Capacity – heaped 4 cu yd (3 cu m)
Bucket Capacity – struck 4 cu yd (3 cu m)
Bucket Width 10 ft (3 m)
Dump Clearance at Max Raise 11 ft (3 m)

Dimensions

Ground Clearance 1 ft (0 m)
Height – Top of Cab 11 ft (3 m)
Hinge Pin – Max Height 15 ft (5 m)
Length with Bucket on Ground 28 ft (9 m)
Reach at Max Lift and Dump 4 ft (1 m)
Wheelbase 11 ft (3 m)
Width Over Tires 10 ft (3 m)

Engine

Aspiration Turbocharged charge air cooled
Displacement 414 cu in (6,784 cu cm)
Engine Model 6068H, Tier III certified
Net Power 232 hp (173 kw)
Number of Cylinders 6
Power Measured @ 1700 rpm
Torque Measured @ 1400 rpm
Torque Rise 55%

Hydraulic System

Dump Time 1.4 seconds
Lower Time 3 seconds
Pump Flow Capacity 82 gpm (310 lpm)
Pump Type Variable axial piston
Raise Time 5.5 seconds
Relief Valve Setting 3650 psi

Operating Specifications

Alternator Supplied Amperage 80 amps
Cooling System Fluid Capacity 8 gal (30 l)
Engine Oil Fluid Capacity 7 gal (25 l)
Front Axle/Diff Fluid Capacity 6 gal (22 l)
Fuel Capacity 93 gal (352 l)
Hydraulic System Fluid Capacity 29 gal (110 l)
Operating Voltage 24 volts
Operating Weight 40,799 lbs (18,506 kg)
Rear Axle Oscillation 26 degrees
Rear Axle/Diff Fluid Capacity 6 gal (22 l)
Static Tipping Weight 26,958 lbs (12,228 kg)
Tire Size 23.5 R25
Transmission Fluid Capacity 6 gal (23 l)
Turning Radius 18 ft (6 m)

Transmission

Max Speed – Forward 23 mph (37 kph)
Max Speed – Reverse 16 mph (25 kph)
Number of Forward Gears 4
Number of Reverse Gears 3
Transmission Type Countershaft, powershift
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