John Deere 644H MH Wheel Loader

Bucket

Breakout Force 34,340 lbs (15,576 kg)
Bucket Capacity – heaped 5 cu yd (3 cu m)
Bucket Capacity – struck 4 cu yd (3 cu m)
Bucket Width 10 ft (3 m)
Dump Clearance at Max Raise 10 ft (3 m)

Dimensions

Ground Clearance 2 ft (0 m)
Height – Top of Cab 11 ft (3 m)
Hinge Pin – Max Height 14 ft (4 m)
Length with Bucket on Ground 26 ft (8 m)
Reach at Max Lift and Dump 4 ft (1 m)
Wheelbase 11 ft (3 m)
Width Over Tires 10 ft (3 m)

Engine

Aspiration Turbocharger with Aftercooler
Displacement 496 cu in (8,128 cu cm)
Engine Model 6081H
Gross Power 212 hp (158 kw)
Net Power 180 hp (134 kw)
Number of Cylinders 6
Power Measured @ 2200 rpm
Torque Measured @ 1300 rpm
Torque Rise 40%

Hydraulic System

Dump Time 1.2 seconds
Lower Time 3 seconds
Pump Flow Capacity 74 gpm (280 lpm)
Pump Type Piston Pump
Raise Time 6 seconds
Relief Valve Setting 3600 psi

Operating Specifications

Alternator Supplied Amperage 55 amps
Cooling System Fluid Capacity 8 gal (29 l)
Engine Oil Fluid Capacity 7 gal (25 l)
Front Axle/Diff Fluid Capacity 7 gal (27 l)
Fuel Capacity 90 gal (341 l)
Hydraulic System Fluid Capacity 31 gal (117 l)
Operating Voltage 24 volts
Operating Weight 38,927 lbs (17,657 kg)
Rear Axle Oscillation 26 degrees
Rear Axle/Diff Fluid Capacity 7 gal (27 l)
Static Tipping Weight 30,906 lbs (14,019 kg)
Tire Size 23.5-25
Transmission Fluid Capacity 7 gal (26 l)
Turning Radius 18 ft (6 m)

Transmission

Max Speed – Forward 24 mph (39 kph)
Max Speed – Reverse 16 mph (26 kph)
Number of Forward Gears 4
Number of Reverse Gears 3
Transmission Type Power Shift
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