John Deere 644GH Wheel Loader

Bucket

Breakout Force 38,045 lbs (17,257 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 10 ft (3 m)

Dimensions

Ground Clearance 2 ft (0 m)
Height – Top of Cab 11 ft (3 m)
Hinge Pin – Max Height 13 ft (4 m)
Length with Bucket on Ground 26 ft (8 m)
Reach at Max Lift and Dump 4 ft (1 m)
Wheelbase 11 ft (3 m)
Width Over Tires 9 ft (3 m)

Engine

Aspiration Turbocharged and Aftercooled
Displacement 466 cu in (7,636 cu cm)
Engine Model 6076A
Gross Power 196 hp (146 kw)
Net Power 185 hp (138 kw)
Number of Cylinders 6
Power Measured @ 2200 rpm
Torque Measured @ 1300 rpm

Hydraulic System

Dump Time 1.8 seconds
Lower Time 3.5 seconds
Pump Flow Capacity 70 gpm (263 lpm)
Pump Type Gear pump type
Raise Time 6.2 seconds
Relief Valve Setting 3000 psi

Operating Specifications

Alternator Supplied Amperage 95 amps
Cooling System Fluid Capacity 8 gal (29 l)
Engine Oil Fluid Capacity 6 gal (24 l)
Front Axle/Diff Fluid Capacity 7 gal (28 l)
Fuel Capacity 75 gal (284 l)
Hydraulic System Fluid Capacity 30 gal (115 l)
Operating Voltage 12 volts
Operating Weight 36,634 lbs (16,617 kg)
Rear Axle Oscillation 26 degrees
Rear Axle/Diff Fluid Capacity 7 gal (28 l)
Static Tipping Weight 29,712 lbs (13,477 kg)
Tire Size 20.5-25
Transmission Fluid Capacity 4 gal (14 l)
Turning Radius 18 ft (5 m)

Transmission

Max Speed – Forward 22 mph (35 kph)
Max Speed – Reverse 14 mph (22 kph)
Number of Forward Gears 4
Number of Reverse Gears 3
Transmission Type Powershift
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