John Deere 644A Wheel Loader

Bucket

Dump Clearance At Max Raise 9.25 ft in (2819.4 mm)
Breakout Force 41515 lb (184.67 kN)
Bucket Capacity – Heaped 2.5 yd3 (1.92 m3)
Bucket Capacity – Struck 2.05 yd3 (1.57 m3)
Bucket Width 8.7 ft in (2650 mm)

Dimensions

Ground Clearance 1.44 ft in (437 mm)
Length With Bucket On Ground 20.67 ft in (6300.22 mm)
Height To Top Of Cab 10.17 ft in (3099.82 mm)
Wheelbase 8.67 ft in (2640 mm)
Hinge Pin – Max Height 11.85 ft in (3610 mm)
Reach At Max Lift And Dump 2.92 ft in (889 mm)

Engine Details

Engine Make John Deere
Net Power 131 hp (133 kw)
Gross Power 141 hp (143 kw)
Power Measured @ 2400 rpm
Max Torque 345 lb ft (467.8 Nm)
Displacement 404 cu in (6.7 L)
Torque Measured @ 1600 rpm
Aspiration Turbocharged

Operational Specs

Operating Weight 2520 lb (11440 kg)
Fuel Tank Capacity 50 gal (189.3 L)
Hydraulic System Fluid Capacity 17.5 gal (66.2 L)
Engine Oil Fluid Capacity 4.3 gal (16.1 L)
Cooling System Fluid Capacity 9 gal (34.1 L)
Transmission Fluid Capacity 9.8 gal (36.9 L)
Front Axle/Diff Fluid Capacity 6 gal (22.7 L)
Rear Axle/Diff Fluid Capacity 6.5 gal (24.6 L)
Static Tipping Weight 18604 lb (8439 kg)
Turning Radius 15.5 ft in (4700.1 mm)
Operating Voltage 12 V
Alternator Supplied Amperage 55 amps
Rear Axle Oscillation 22 degrees
Tire Size 16-24 / 20.5- 25

Transmission

Transmission Type Powershift Transmission
Number Of Forward Gears 4
Number Of Reverse Gears 2
Max Speed – Forward 23 mph (37 km/h)
Max Speed – Reverse 9.5 mph (15.3 km/h)

Hydraulic System

Relief Valve Setting 2250 psi (15513.2 kPa)
Pump Flow Capacity 60 gal/min (227 L/min)
Pump Type Variable displacement type pump
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