John Deere 644D Wheel Loader

Bucket

Dump Clearance At Max Raise 9.75 ft in (2970 mm)
Bucket Capacity – Heaped 3 yd3 (2.3 m3)
Bucket Capacity – Struck 2.52 yd3 (1.93 m3)
Bucket Width 8.73 ft in (2660 mm)
Breakout Force 24430 lb (109 kN)

Dimensions

Ground Clearance 1.69 ft in (514 mm)
Length With Bucket On Ground 23.08 ft in (7034.79 mm)
Width Over Tires 8.55 ft in (2605 mm)
Height To Top Of Cab 10.5 ft in (3200.4 mm)
Wheelbase 9.59 ft in (2920 mm)
Hinge Pin – Max Height 12.67 ft in (3861.82 mm)
Reach At Max Lift And Dump 3.07 ft in (933 mm)

Engine Details

Number Of Cylinders 6
Engine Make John Deere
Engine Model 6-466T
Net Power 155 hp (115.6 kw)
Gross Power 165 hp (123.1 kw)
Power Measured @ 2200 rpm
Max Torque 480 lb ft (650.8 Nm)
Displacement 466 cu in (7.7 L)
Torque Measured @ 1400 rpm
Aspiration Turbocharged

Operational Specs

Operating Weight 29320 lb (13300 kg)
Fuel Tank Capacity 67 gal (254 L)
Hydraulic System Fluid Capacity 25.1 gal (95 L)
Engine Oil Fluid Capacity 5.1 gal (19 L)
Cooling System Fluid Capacity 7.4 gal (28 L)
Transmission Fluid Capacity 9.8 gal (37 L)
Front Axle/Diff Fluid Capacity 6.1 gal (23 L)
Rear Axle/Diff Fluid Capacity 6.1 gal (23 L)
Static Tipping Weight 25210 lb (11435.1 kg)
Turning Radius 16.5 ft in (5029.2 mm)
Operating Voltage 12 V
Alternator Supplied Amperage 42 amps
Rear Axle Oscillation 22 degrees
Tire Size 20.5-25

Transmission

Transmission Type Power shift planetary
Number Of Forward Gears 4
Number Of Reverse Gears 2
Max Speed – Forward 27.3 mph (43.9 km/h)
Max Speed – Reverse 8.2 mph (13.2 km/h)

Hydraulic System

Relief Valve Setting 2625 psi (18099 kPa)
Pump Flow Capacity 63 gal/min (238.5 L/min)
Raise Time 6.1 sec
Dump Time 2 sec
Lower Time 4.3 sec
Pump Type Gear type pump
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