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John Deere 644K HYBRID Wheel Loader


Breakout Force33903 lbs (15,378 kg)
Bucket Capacity - Smallest4.1 cu yds (3 m)
Dump Clearance at Max Raise 9.7 ft (3 m)
Largest bucket capacity4.2 cu yds (3 m)


Heaped Capacity4.2 cu yds (3 m)
Hydraulic Tank28.1 gal (106 l)
Transmission10.1 gal (38 l)


Height - Top of Cab11.3 ft (3 m)
Hinge Pin - Max Height13.6 ft (4 m)
Length with Bucket on Ground27.3 ft (8 m)
Reach at Max Lift and Dump5.3 ft (2 m)
Turning Circle43.6 ft (13 m)
Wheelbase10.7 ft (3 m)
Width Over Tires9.5 ft (3 m)


Differential lockFront- Locking, Rear- Open
Parking Brake TypeWet Multi Disc - Transmission
Ride control systemOptional
Service Brake - LocationAxle Inboard
Service Brake ActuationHydraulic
Service Brake TypeWet Disc
Tire size - Standard23.5 R25


Alternator100 A
Displacement415 cu in (0 m)
Emission levelTier 4
Engine MakeJohn Deere
Engine ModelPowerTech PSX 6068
Engine Output-Net229.4 hp (171 kw)
ModelPowerTech PSX 6068
Net Power229 hp (171 kw)
Rated Speed1700 rpm
System Voltage24 V
Torque731 lbs/ft
Torque Rise19%
Transmission TypePowershift w/Hybrid-Electric Drive

Operating Specifications

Front Axle/Diff Fluid Capacity5.9 gal (22 l)
Fuel Capacity104.9 gal (397 l)
Operating Weight40435 lbs (18,341 kg)
Rated Bucket Capacity4.25 cu yds (3 m)
Rear Axle/Diff Fluid Capacity5.9 gal (22 l)


Pump Flow78.5 gal/min (297 l/min)
System Pressure251.7 psi


Operational Weight40436 - 42,206 lbs (18,342 - 19,145 kg)

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