- Breakout - Bucket: 15378 (33903) kgf (lbf)
- Bucket Capacity - Smallest: 4.06 yd3 / 3.1 m3
- Largest Bucket Capacity: 4.19 yd3 / 3.2 m3
- Ground Clearance: 18.15 in / 461 mm
Published dimensions and weight
John Deere 644K
Weighing roughly 18.7 t, the John Deere 644K is a wheel loader in that size class.
01Published dimensions and weight
Dimensions reference
Measurement reference — not to scale
01Dimensions referenceLength × width × height
02Operating Weight41186.8 lb18682 kg
03Selected published values39
Wheel loaders are commonly used to load, carry and stockpile loose material on prepared surfaces. Published rows for John Deere 644K include published operating weight of 41186.8 lb / 18682 kg, the published “Breakout - Bucket” field of 15378 (33903) kgf (lbf), the published “Bucket Capacity - Smallest” field of 4.06 yd3 / 3.1 m3. These values describe the published configuration; verify the specific machine's configuration, attachments and records.
- Compare the published “Breakout - Bucket” field (15378 (33903) kgf (lbf)) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Bucket Capacity - Smallest” field (4.06 yd3 / 3.1 m3) with the specific machine's configuration and records; options and condition can differ.
- Compare the published “Largest Bucket Capacity” field (4.19 yd3 / 3.2 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
Breakout - Bucket15378 (33903) kgf (lbf)15378 (33903) kgf (lbf)
Bucket Capacity - Smallest4.06 yd33.1 m3
Largest Bucket Capacity4.19 yd33.2 m3
Dimensions
Ground Clearance18.15 in461 mm
Length With Bucket On Ground27.24 ft8300 mm
Width Over Tires9.44 ft2875 mm
Wheelbase10.7 ft3260 mm
Hinge Pin - Max Height13.52 ft4120 mm
Reach At Max Lift And Dump5.29 ft1610 mm
Turning Circle43.57 ft13280 mm
Height Over Cab11.26 ft3430 mm
Engine
PumpPistonPiston
Engine Output-Net232 hp173 kw
Transmission TypePowershiftPowershift
Engine MakeJohn DeereJohn Deere
Engine ModelPowerTech PSS 6090PowerTech PSS 6090
Torque783.3 lb ft1062 Nm
Rated Speed1700 rpm1700 rpm
Displacement549.3 cu in9 L
Torque Rise56 %56 %
System Voltage24 V24 V
Emission LevelTier 4Tier 4
Alternator130 amps130 amps
Driveline
Ride Control SystemOptionalOptional
Service Brake TypeWet DiscWet Disc
Parking Brake TypeWet Multi Disc - TransmissionWet Multi Disc - Transmission
Differential LockFront- Locking, Rear- OpenFront- Locking, Rear- Open
Service Brake ActuationHydraulicHydraulic
Tire Size - Standard23.5 R2523.5 R25
Service Brake - LocationAxle InboardAxle Inboard
Capacities
Hydraulic Tank27.8 gal105.2 L
Heaped Capacity4.2 yd33.2 m3
Transmission6.1 gal23 L
Operational
Operating Weight41186.8 lb18682 kg
Fuel Capacity104.9 gal397 L
Front Axle/Diff Fluid Capacity5.9 gal22 L
Rear Axle/Diff Fluid Capacity5.9 gal22 L
Transmission
Pump Flow78.5 gal/min297 L/min
System Pressure251.7 psi1735.2 kPa
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Manufacturer-published specifications.