- Dump Clearance At Max Raise: 9.33 ft / 2843.79 mm
- Breakout Force: 24120 lb / 108.11 kN
- Bucket Capacity - Heaped: 2.5 yd3 / 1.91 m3
- Bucket Capacity - Struck: 2.05 yd3 / 1.57 m3
Published dimensions and weight
John Deere 644B
Weighing roughly 12.7 t and rated at 145 hp, the John Deere 644B is a wheel loader in its size class.
01Published dimensions and weight
Dimensions reference
Measurement reference — not to scale
01Dimensions referenceLength × width × height
02Operating Weight28100 lb12746 kg
03Selected published values42
Wheel loaders are commonly used to load, carry and stockpile loose material on prepared surfaces. Published rows for John Deere 644B include published bucket capacity of 2.5 yd3 / 1.91 m3, published breakout force of 24120 lb / 108.11 kN, published operating weight of 28100 lb / 12746 kg. These values describe the published configuration; verify the specific machine's configuration, attachments and records.
- Compare the published “Dump Clearance At Max Raise” field (9.33 ft / 2843.79 mm) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Breakout Force” field (24120 lb / 108.11 kN) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Bucket Capacity - Heaped” field (2.5 yd3 / 1.91 m3) with the specific machine's configuration and records; options and condition can differ.
02Specifications
Published values, clearly grouped.
Published specifications and measurements are organized by section for quick reference.
Bucket
Dump Clearance At Max Raise9.33 ft2843.79 mm
Breakout Force24120 lb108.11 kN
Bucket Capacity - Heaped2.5 yd31.91 m3
Bucket Capacity - Struck2.05 yd31.57 m3
Bucket Width8.73 ft2660 mm
Dimensions
Ground Clearance1.66 ft505 mm
Length With Bucket On Ground21.1 ft6042 mm
Height To Top Of Cab10.63 ft3240.03 mm
Wheelbase8.67 ft2640 mm
Hinge Pin - Max Height12 ft3657.6 mm
Reach At Max Lift And Dump2.89 ft879 mm
Engine
Number Of Cylinders66
Engine Make22402240
Net Power145 hp108.1 kw
Gross Power160 hp119.3 kw
Power Measured @2200 rpm2200 rpm
Max Torque432 lb ft586 Nm
Displacement531 cu in8.8 L
Torque Measured @1500 rpm1500 rpm
AspirationTurbochargedTurbocharged
Operational
Operating Weight28100 lb12746 kg
Fuel Capacity56 gal211.9 L
Hydraulic System Fluid Capacity17.5 gal66.3 L
Engine Oil Fluid Capacity5.5 gal20.9 L
Cooling System Fluid Capacity12.3 gal46.4 L
Transmission Fluid Capacity9.8 gal37 L
Front Axle/Diff Fluid Capacity6 gal22.7 L
Rear Axle/Diff Fluid Capacity6.3 gal23.7 L
Static Tipping Weight22905 lb10390 kg
Turning Radius15.5 ft4700.1 mm
Operating Voltage12 V12 V
Alternator Supplied Amperage42 amps42 amps
Rear Axle Oscillation22 degrees22 degrees
Tire Size14.5-25 / 20.5-2514.5-25 / 20.5-25
Transmission
Transmission TypePower shift PlanetaryPower shift Planetary
Number Of Forward Gears44
Number Of Reverse Gears22
Max Speed - Forward25.8 mph41.5 km/h
Max Speed - Reverse10.2 mph16.4 km/h
Hydraulic System
Relief Valve Setting2250 psi158.2 kPa
Pump Flow Capacity58.2 gal/min220 L/min
Pump TypeGearGear
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Manufacturer-published specifications.