- Dump Clearance At Max Raise: 11.08 ft / 3380 mm
- Bucket Capacity - Heaped: 4 yd3 / 3 m3
- Bucket Width: 9.75 ft / 2971.8 mm
- Breakout Force: 30574 lb / 136 kN
Published dimensions and weight
John Deere 644J High-lift
Weighing roughly 18.4 t and rated at 185 hp, the John Deere 644J High-lift is a wheel loader in its size class.
01Published dimensions and weight
Dimensions reference
Measurement reference — not to scale
01Dimensions referenceLength × width × height
02Operating Weight40620 lb18425 kg
03Selected published values45
Wheel loaders are commonly used to load, carry and stockpile loose material on prepared surfaces. Published rows for John Deere 644J High-lift include published bucket capacity of 4 yd3 / 3 m3, published breakout force of 30574 lb / 136 kN, published operating weight of 40620 lb / 18425 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 (11.08 ft / 3380 mm) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Bucket Capacity - Heaped” field (4 yd3 / 3 m3) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Bucket Width” field (9.75 ft / 2971.8 mm) 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 Raise11.08 ft3380 mm
Bucket Capacity - Heaped4 yd33 m3
Bucket Width9.75 ft2971.8 mm
Breakout Force30574 lb136 kN
Dimensions
Ground Clearance1.5 ft460 mm
Length With Bucket On Ground28 ft8530 mm
Height To Top Of Cab11.17 ft3400 mm
Wheelbase10.5 ft3200 mm
Hinge Pin - Max Height15 ft4570 mm
Reach At Max Lift And Dump3.83 ft1170 mm
Engine
Number Of Cylinders66
Engine Make22402240
Engine Model6068H6068H
Net Power185 hp138 kw
Power Measured @2200 rpm2200 rpm
Max Torque749 lb ft1016 Nm
Displacement414 cu in6.8 L
Torque Measured @1400 rpm1400 rpm
AspirationTurbocharged charge air cooledTurbocharged charge air cooled
Torque Rise55 %55 %
Operational
Operating Weight40620 lb18425 kg
Fuel Capacity93 gal352 L
Hydraulic System Fluid Capacity31 gal117 L
Engine Oil Fluid Capacity6.5 gal24.5 L
Cooling System Fluid Capacity7.8 gal29.5 L
Transmission Fluid Capacity7.1 gal26.5 L
Front Axle/Diff Fluid Capacity5.9 gal22 L
Rear Axle/Diff Fluid Capacity5.9 gal22 L
Static Tipping Weight27689 lb12560 kg
Turning Radius18 ft5.5 m
Operating Voltage24 V24 V
Alternator Supplied Amperage80 amps80 amps
Rear Axle Oscillation24 degrees24 degrees
Tire Size23.5 R2523.5 R25
Transmission
Transmission TypeAutomatic PowershiftAutomatic Powershift
Number Of Forward Gears44
Number Of Reverse Gears33
Max Speed - Forward22 mph35.4 km/h
Max Speed - Reverse15.5 mph25 km/h
Hydraulic System
Relief Valve Setting3600 psi24800 kPa
Pump Flow Capacity68 gal/min257 L/min
Raise Time5.9 sec5.9 sec
Dump Time1.9 sec1.9 sec
Lower Time2.8 sec2.8 sec
Pump TypeVariable axial pistonVariable axial piston
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Manufacturer-published specifications.