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John Deere

644K HYBRID

Wheel Loader

Operating Weight
40,435 lb
Net Power
229.0 hp
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John Deere 644K HYBRID Wheel Loader
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Specifications

48 data points

Operating Specifications

Operating Specifications specifications
Operating Weight40,435 lb
Fuel Capacity104.9 gal
Front Axle/Diff Fluid Capacity5.9 gal
Rear Axle/Diff Fluid Capacity5.9 gal
Rated Bucket Capacity4.25 yd³

Engine

Engine specifications
Engine ModelPowerTech PSX 6068
Displacement415 in³
Net Power229.0 hp
Engine MakeJohn Deere
MakeDeere
Torque Rise19.0 %
Torque731 lb-ft
Alternator100 A
System Voltage24 V
Rated Speed1,700 rpm
Transmission TypePowershift w/Hybrid-Electric Drive
Emission levelTier 4
PumpPiston
Engine Output-Net229.4 hp

Weights

Weights specifications
Operating Weight40,436 – 42,206 lb

Dimensions

Dimensions specifications
Height - Top of Cab135 in
Wheelbase128 in
Width Over Tires114 in
Reach at Max Lift and Dump64 in
Length with Bucket on Ground328 in
Hinge Pin - Max Height163 in
Turning Circle523 in

Transmission

Transmission specifications
Pump Flow78.5 gal/min
System Pressure252 psi

Fluid Capacities

Fluid Capacities specifications
Hydraulic Tank28.1 gal
Transmission10.1 gal
Heaped Capacity4.20 yd³

Bucket

Bucket specifications
Bucket Capacity - Smallest4.09 yd³
Dump Clearance at Max Raise117 in
Breakout Force33,903 lb
Largest bucket capacity4.20 yd³

General Specifications

General Specifications specifications
Operating Weight40,436 (18,341) — Starting 2019 Model Year
Bucket Capacity4.0 - 4.25 (3.1 - 3.2) — Starting 2019 Model Year
Engine typeDeere PSX 6090 — Starting 2019 Model Year
Engine Power229 (171) — Starting 2019 Model Year
Max Dump Height9.7 (2.9) — Starting 2019 Model Year

Driveline

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

Comparable machines

Other wheel loaders in a similar weight class.