John Deere 644J High-lift Wheel Loader

Bucket

Breakout Force 30,574 lbs (13,868 kg)
Bucket Capacity – heaped 4 cu yd (3 cu m)
Bucket Width 10 ft (3 m)
Dump Clearance at Max Raise 11 ft (3 m)

Dimensions

Ground Clearance 2 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)

Engine

Aspiration Turbocharged charge air cooled
Displacement 414 cu in (6,784 cu cm)
Engine Model 6068H
Net Power 185 hp (138 kw)
Number of Cylinders 6
Power Measured @ 2200 rpm
Torque Measured @ 1400 rpm
Torque Rise 55%

Hydraulic System

Dump Time 1.9 seconds
Lower Time 2.8 seconds
Pump Flow Capacity 68 gpm (257 lpm)
Pump Type Variable axial piston
Raise Time 5.9 seconds
Relief Valve Setting 3600 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 31 gal (117 l)
Operating Voltage 24 volts
Operating Weight 40,620 lbs (18,425 kg)
Rear Axle Oscillation 24 degrees
Rear Axle/Diff Fluid Capacity 6 gal (22 l)
Static Tipping Weight 27,689 lbs (12,560 kg)
Tire Size 23.5 R25
Transmission Fluid Capacity 7 gal (27 l)
Turning Radius 18 ft (5 m)

Transmission

Max Speed – Forward 22 mph (35 kph)
Max Speed – Reverse 16 mph (25 kph)
Number of Forward Gears 4
Number of Reverse Gears 3
Transmission Type Automatic Powershift
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