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John Deere 644K HYBRID Wheel Loader

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General Specifications

?Model644K Hybrid
Starting 2019 Model Year
Bucket Capacity cu. yd. (cu m)4.0 (3.1)
Starting 2017 Model Year
Engine Power hp (kw)232 (173)
Starting 2017 Model Year
Engine typeDeere PowerTech PSX 6090
Starting 2016 Model Year
Max Dump Height ft. (m)9.7 (2.9)
Starting 2019 Model Year
Operating?Weight41,188 (18682)
Starting 2017 Model Year

Bucket

Breakout Force33,903 lbs (15,378 kg)
Bucket Capacity - Smallest4 cu yd (3 cu m)
Dump Clearance at Max Raise 10 ft (3 m)
Largest bucket capacity4 cu yd (3 cu m)

Capacities

Heaped Capacity4 cu yd (3 cu m)
Hydraulic Tank28 gal (106 l)
Transmission10 gal (38 l)

Dimensions

Height - Top of Cab11 ft (3 m)
Hinge Pin - Max Height14 ft (4 m)
Length with Bucket on Ground27 ft (8 m)
Reach at Max Lift and Dump5 ft (2 m)
Turning Circle44 ft (13 m)
Wheelbase11 ft (3 m)
Width Over Tires10 ft (3 m)

Driveline

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

Engine

Alternator100 amps
Displacement415 cu in (6,801 cu cm)
Emission levelTier 4
Engine MakeJohn Deere
Engine ModelPowerTech PSX 6068
Engine Output-Net229 hp (171 kw)
MakeDeere
Net Power229 hp (171 kw)
PumpPiston
Rated Speed1700 rpm
System Voltage24 V
Torque731 lbs ft (991 nm)
Torque Rise19%
Transmission TypePowershift w/Hybrid-Electric Drive

Operating Specifications

Front Axle/Diff Fluid Capacity6 gal (22 l)
Fuel Capacity105 gal (397 l)
Operating Weight40,435 lbs (18,341 kg)
Rated Bucket Capacity4 cu yd (3 cu m)
Rear Axle/Diff Fluid Capacity6 gal (22 l)

Transmission

Pump Flow79 gpm (297 lpm)
System Pressure251.7 psi

Weights

Operational Weight40436-42,206 lbs (18,341-19,144 kg)