John Deere 644J Z-Bar Wheel Loader

Bucket

Dump Clearance At Max Raise 9.67 ft in (2950 mm)
Bucket Capacity – Heaped 4.25 yd3 (3.2 m3)
Bucket Capacity – Struck 3.7 yd3 (2.8 m3)
Bucket Width 9.5 ft in (2895.6 mm)
Breakout Force 34407 lb (153 kN)

Dimensions

Ground Clearance 1.42 ft in (434 mm)
Length With Bucket On Ground 26.42 ft in (8050 mm)
Width Over Tires 9.43 ft in (2875 mm)
Height To Top Of Cab 11.17 ft in (3400 mm)
Wheelbase 10.5 ft in (3200 mm)
Hinge Pin – Max Height 13.58 ft in (4140 mm)
Reach At Max Lift And Dump 3.67 ft in (1120 mm)

Engine Details

Number Of Cylinders 6
Engine Make John Deere
Engine Model 6068H
Net Power 185 hp (138 kw)
Power Measured @ 2200 rpm
Max Torque 749 lb ft (1016 Nm)
Displacement 414 cu in (6.8 L)
Torque Measured @ 1400 rpm
Aspiration Turbocharged charge air cooled
Torque Rise 55 %

Operational Specs

Operating Weight 40150 lb (18212 kg)
Fuel Tank Capacity 93 gal (352 L)
Hydraulic System Fluid Capacity 31 gal (117 L)
Engine Oil Fluid Capacity 6.5 gal (24.5 L)
Cooling System Fluid Capacity 7.8 gal (29.5 L)
Transmission Fluid Capacity 7.1 gal (26.5 L)
Front Axle/Diff Fluid Capacity 5.9 gal (22 L)
Rear Axle/Diff Fluid Capacity 5.9 gal (22 L)
Static Tipping Weight 34379 lb (15594 kg)
Turning Radius 18 ft in (5490 mm)
Operating Voltage 24 V
Alternator Supplied Amperage 80 amps
Rear Axle Oscillation 26 degrees
Tire Size 23.5 R25

Transmission

Transmission Type Automatic powershift
Number Of Forward Gears 4
Number Of Reverse Gears 3
Max Speed – Forward 22 mph (35.4 km/h)
Max Speed – Reverse 15.5 mph (25 km/h)

Hydraulic System

Relief Valve Setting 3600 psi (24800 kPa)
Pump Flow Capacity 68 gal/min (257 L/min)
Raise Time 6.2 sec
Dump Time 1.4 sec
Lower Time 3 sec
Pump Type Variable axial piston
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