John Deere 644H MH Wheel Loader

Bucket

Dump Clearance At Max Raise 9.72 ft in (2962 mm)
Bucket Capacity – Heaped 4.5 yd3 (3.4 m3)
Bucket Capacity – Struck 3.8 yd3 (2.9 m3)
Bucket Width 9.98 ft in (3040 mm)
Breakout Force 34340 lb (152.76 kN)

Dimensions

Ground Clearance 1.56 ft in (473 mm)
Length With Bucket On Ground 25.64 ft in (7815 mm)
Width Over Tires 9.43 ft in (2874 mm)
Height To Top Of Cab 11.2 ft in (3412 mm)
Wheelbase 10.5 ft in (3200 mm)
Hinge Pin – Max Height 13.64 ft in (4156 mm)
Reach At Max Lift And Dump 3.47 ft in (1055 mm)

Engine Details

Number Of Cylinders 6
Engine Make John Deere
Engine Model 6081H
Net Power 180 hp (134 kw)
Gross Power 212 hp (158 kw)
Power Measured @ 2200 rpm
Max Torque 745 lb ft (1010.1 Nm)
Displacement 496 cu in (8.1 L)
Torque Measured @ 1300 rpm
Aspiration Turbocharger with Aftercooler
Torque Rise 40 %

Operational Specs

Operating Weight 38927 lb (17657 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 30906 lb (14019 kg)
Turning Radius 18.1 ft in (5500 mm)
Operating Voltage 24 V
Alternator Supplied Amperage 55 amps
Rear Axle Oscillation 26 degrees
Tire Size 23.5-25

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 (24850 kPa)
Pump Flow Capacity 74 gal/min (280 L/min)
Raise Time 6 sec
Dump Time 1.2 sec
Lower Time 3 sec
Pump Type Piston Pump
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