John Deere 644H Wheel Loader

Bucket

Breakout Force 28,976 lbs (13,143 kg)
Bucket Capacity – heaped 4 cu yd (3 cu m)
Bucket Capacity – struck 4 cu yd (3 cu m)

Dimensions

Dump Clearance at Max Lift 9 ft (3 m)
Fork Tine Length 5 ft (2 m)
Ground Clearance 2 ft (0 m)
Height – Top of Cab 11 ft (3 m)
Hinge Pin Max Height 14 ft (4 m)
Length w/ Bucket on Ground 27 ft (8 m)
Length with out Forks on Ground 28 ft (9 m)
Max Lift Height 13 ft (4 m)
Reach at Max Height and Dump 4 ft (1 m)
Wheelbase 11 ft (3 m)
Width Over Tires 10 ft (3 m)

Engine

Aspiration Turbocharged
Displacement 496 cu in (8,128 cu cm)
Engine Model 6081H
Gross Power 180 hp (134 kw)
Max Torque 755 lbs ft (1,024 nm)
Net Power 221 hp (165 kw)
Number of Cylinders 6
Power Measured @ 2200 rpm
Torque Measured @ 1300 rpm
Torque Rise 75%

Hydraulic System

Dump Time 1.4 seconds
Lower Time 3 seconds
Pump Flow Capacity 68 gpm (257 lpm)
Pump Type Piston Pump
Raise Time 6.2 seconds
Relief Valve Setting 3600 psi

Operating Specifications

Alternator Supplied Amperage 55 amps
Fuel Capacity 100 gal (379 l)
Operating Voltage 24 volts
Operating Weight 38,876 lbs (17,634 kg)
Rear Axle Oscillation 26 degrees
Static Tipping Load – Bucket 31,210 lbs (14,157 kg)
Static Tipping Load – Forks 22,782 lbs (10,334 kg)
Tire Size 23.5-25
Turning Radius 18 ft (6 m)

Transmission

Max Speed Forward 22 mph (35 kph)
Max Speed Reverse 16 mph (25 kph)
Number of Forward Gears 4
Number of Reverse Gears 3
Transmission Type Power Shift
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