John Deere 644D Wheel Loader

Bucket

Breakout Force 24,430 lbs (11,081 kg)
Bucket Capacity – heaped 3 cu yd (2 cu m)
Bucket Capacity – struck 3 cu yd (2 cu m)
Bucket Width 9 ft (3 m)
Dump Clearance at Max Raise 10 ft (3 m)

Dimensions

Ground Clearance 2 ft (1 m)
Height – Top of Cab 11 ft (3 m)
Hinge Pin – Max Height 13 ft (4 m)
Length with Bucket on Ground 23 ft (7 m)
Reach at Max Lift and Dump 3 ft (1 m)
Wheelbase 10 ft (3 m)
Width Over Tires 9 ft (3 m)

Engine

Aspiration Turbocharged
Displacement 466 cu in (7,636 cu cm)
Engine Model 6-466T
Gross Power 165 hp (123 kw)
Net Power 155 hp (116 kw)
Number of Cylinders 6
Power Measured @ 2200 rpm
Torque Measured @ 1400 rpm

Hydraulic System

Dump Time 2 seconds
Lower Time 4.3 seconds
Pump Flow Capacity 63 gpm (238 lpm)
Pump Type Gear type pump
Raise Time 6.1 seconds
Relief Valve Setting 2625 psi

Operating Specifications

Alternator Supplied Amperage 42 amps
Cooling System Fluid Capacity 7 gal (28 l)
Engine Oil Fluid Capacity 5 gal (19 l)
Front Axle/Diff Fluid Capacity 6 gal (23 l)
Fuel Capacity 67 gal (254 l)
Hydraulic System Fluid Capacity 25 gal (95 l)
Operating Voltage 12 volts
Operating Weight 29,320 lbs (13,299 kg)
Rear Axle Oscillation 22 degrees
Rear Axle/Diff Fluid Capacity 6 gal (23 l)
Static Tipping Weight 25,210 lbs (11,435 kg)
Tire Size 20.5-25
Transmission Fluid Capacity 10 gal (37 l)
Turning Radius 17 ft (5 m)

Transmission

Max Speed – Forward 27 mph (44 kph)
Max Speed – Reverse 8 mph (13 kph)
Number of Forward Gears 4
Number of Reverse Gears 2
Transmission Type Power shift planetary
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