John Deere 644H High Lift Wheel Loader

Bucket

Dump Clearance At Max Raise 11.08 ft in (3375 mm)
Bucket Capacity – Heaped 4.25 yd3 (3.3 m3)
Bucket Capacity – Struck 3.7 yd3 (2.8 m3)
Bucket Width 9.52 ft in (2900 mm)
Breakout Force 30574 lb (136 kN)

Dimensions

Ground Clearance 1.52 ft in (461 mm)
Length With Bucket On Ground 28 ft in (8525 mm)
Width Over Tires 8.85 ft in (2697 mm)
Height To Top Of Cab 11.16 ft in (3400 mm)
Wheelbase 10.5 ft in (3200 mm)
Hinge Pin – Max Height 15 ft in (4569 mm)
Reach At Max Lift And Dump 3.86 ft in (1175 mm)

Engine Details

Number Of Cylinders 6
Engine Make John Deere
Engine Model 6081H
Net Power 180 hp (134.3 kw)
Gross Power 205 hp (153 kw)
Power Measured @ 2200 rpm
Max Torque 745 lb ft (1010 Nm)
Displacement 496 cu in (8.1 L)
Torque Measured @ 1300 rpm
Aspiration Turbocharged with Aftercooler

Operational Specs

Operating Weight 39000 lb (17690 kg)
Fuel Tank Capacity 90 gal (341 L)
Hydraulic System Fluid Capacity 31 gal (117 L)
Engine Oil Fluid Capacity 6.7 gal (25 L)
Cooling System Fluid Capacity 7.7 gal (29 L)
Transmission Fluid Capacity 6.9 gal (26 L)
Front Axle/Diff Fluid Capacity 7.2 gal (27 L)
Rear Axle/Diff Fluid Capacity 7.2 gal (27 L)
Static Tipping Weight 24798 lb (11248 kg)
Turning Radius 18 ft in (5500 mm)
Operating Voltage 24 V
Alternator Supplied Amperage 55 amps
Rear Axle Oscillation 26 degrees
Tire Size 20.5-25

Transmission

Transmission Type Power Shift
Number Of Forward Gears 4
Number Of Reverse Gears 3
Max Speed – Forward 24 mph (39 km/h)
Max Speed – Reverse 16.4 mph (26.7 km/h)

Hydraulic System

Relief Valve Setting 3600 psi (24821.2 kPa)
Pump Flow Capacity 68 gal/min (257.5 L/min)
Raise Time 6.2 sec
Dump Time 1.4 sec
Lower Time 3 sec
Pump Type Piston Pump
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