John Deere 644B Wheel Loader

Bucket

Breakout Force 24,120 lbs (10,941 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 (1 m)
Height – Top of Cab 11 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 531 cu in (8,702 cu cm)
Gross Power 160 hp (119 kw)
Net Power 145 hp (108 kw)
Number of Cylinders 6
Power Measured @ 2200 rpm
Torque Measured @ 1500 rpm

Hydraulic System

Pump Flow Capacity 58 gpm (220 lpm)
Pump Type Gear
Relief Valve Setting 2250 psi

Operating Specifications

Alternator Supplied Amperage 42 amps
Cooling System Fluid Capacity 12 gal (47 l)
Engine Oil Fluid Capacity 6 gal (21 l)
Front Axle/Diff Fluid Capacity 6 gal (23 l)
Fuel Capacity 56 gal (212 l)
Hydraulic System Fluid Capacity 18 gal (66 l)
Operating Voltage 12 volts
Operating Weight 28,100 lbs (12,746 kg)
Rear Axle Oscillation 22 degrees
Rear Axle/Diff Fluid Capacity 6 gal (24 l)
Static Tipping Weight 22,905 lbs (10,390 kg)
Tire Size 14.5-25 / 20.5-25
Transmission Fluid Capacity 10 gal (37 l)
Turning Radius 16 ft (5 m)

Transmission

Max Speed – Forward 26 mph (42 kph)
Max Speed – Reverse 10 mph (16 kph)
Number of Forward Gears 4
Number of Reverse Gears 2
Transmission Type Power shift Planetary
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