John Deere 644A Wheel Loader

Bucket

Breakout Force 41,515 lbs (18,831 kg)
Bucket Capacity – heaped 3 cu yd (2 cu m)
Bucket Capacity – struck 2 cu yd (2 cu m)
Bucket Width 9 ft (3 m)
Dump Clearance at Max Raise 9 ft (3 m)

Dimensions

Ground Clearance 2 ft (0 m)
Height – Top of Cab 10 ft (3 m)
Hinge Pin – Max Height 12 ft (4 m)
Length with Bucket on Ground 21 ft (6 m)
Reach at Max Lift and Dump 3 ft (1 m)
Wheelbase 9 ft (3 m)

Engine

Aspiration Turbocharged
Displacement 404 cu in (6,620 cu cm)
Gross Power 141 hp (105 kw)
Net Power 131 hp (98 kw)
Power Measured @ 2400 rpm
Torque Measured @ 1600 rpm

Hydraulic System

Pump Flow Capacity 60 gpm (227 lpm)
Pump Type Variable displacement type pump
Relief Valve Setting 2250 psi

Operating Specifications

Alternator Supplied Amperage 55 amps
Cooling System Fluid Capacity 9 gal (34 l)
Engine Oil Fluid Capacity 4 gal (16 l)
Front Axle/Diff Fluid Capacity 6 gal (23 l)
Fuel Capacity 50 gal (189 l)
Hydraulic System Fluid Capacity 18 gal (66 l)
Operating Voltage 12 volts
Operating Weight 2,520 lbs (1,143 kg)
Rear Axle Oscillation 22 degrees
Rear Axle/Diff Fluid Capacity 7 gal (25 l)
Static Tipping Weight 18,604 lbs (8,439 kg)
Tire Size 16-24 / 20.5- 25
Transmission Fluid Capacity 10 gal (37 l)
Turning Radius 16 ft (5 m)

Transmission

Max Speed – Forward 23 mph (37 kph)
Max Speed – Reverse 10 mph (15 kph)
Number of Forward Gears 4
Number of Reverse Gears 2
Transmission Type Powershift Transmission
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