John Deere 644GH Wheel Loader

Bucket

Dump Clearance At Max Raise 9.66 ft in (2942 mm)
Bucket Capacity – Heaped 4 yd3 (3.06 m3)
Bucket Capacity – Struck 3.63 yd3 (2.78 m3)
Bucket Width 10.01 ft in (3050 mm)
Breakout Force 38045 lb (169.24 kN)

Dimensions

Ground Clearance 1.59 ft in (483 mm)
Length With Bucket On Ground 25.79 ft in (7860 mm)
Width Over Tires 8.97 ft in (2732 mm)
Height To Top Of Cab 11.23 ft in (3420 mm)
Wheelbase 10.5 ft in (3200 mm)
Hinge Pin – Max Height 13.13 ft in (4000 mm)
Reach At Max Lift And Dump 3.45 ft in (1049 mm)

Engine Details

Number Of Cylinders 6
Engine Make John Deere
Engine Model 6076A
Net Power 185 hp (138 kw)
Gross Power 196 hp (146 kw)
Power Measured @ 2200 rpm
Max Torque 643 lb ft (872 Nm)
Displacement 466 cu in (7.7 L)
Torque Measured @ 1300 rpm
Aspiration Turbocharged and Aftercooled

Operational Specs

Operating Weight 36634 lb (16617 kg)
Fuel Tank Capacity 75.1 gal (284 L)
Hydraulic System Fluid Capacity 30.4 gal (115 L)
Engine Oil Fluid Capacity 6.4 gal (24 L)
Cooling System Fluid Capacity 7.6 gal (28.5 L)
Transmission Fluid Capacity 3.7 gal (14 L)
Front Axle/Diff Fluid Capacity 7.4 gal (28 L)
Rear Axle/Diff Fluid Capacity 7.4 gal (28 L)
Static Tipping Weight 29712 lb (13477.2 kg)
Turning Radius 18 ft in (5460 mm)
Operating Voltage 12 V
Alternator Supplied Amperage 95 amps
Rear Axle Oscillation 26 degrees
Tire Size 20.5-25

Transmission

Transmission Type Powershift
Number Of Forward Gears 4
Number Of Reverse Gears 3
Max Speed – Forward 21.5 mph (34.6 km/h)
Max Speed – Reverse 13.7 mph (22 km/h)

Hydraulic System

Relief Valve Setting 3000 psi (20684.3 kPa)
Pump Flow Capacity 69.5 gal/min (263.1 L/min)
Raise Time 6.2 sec
Dump Time 1.8 sec
Lower Time 3.5 sec
Pump Type Gear pump type
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