25 Days of RollOuts: John Deere 644K hybrid wheel loader

Therese Dunphy

December 16, 2013


John Deere’s 644K hybrid wheel loader uses diesel and electric power and captures regenerated energy as it is created to use in powering the machine.

AggMan_25TopRollOutsA 229-horsepower John Deere PowerTech 6.8-liter Tier 4 Interim engine powers the loader, running at an operator-selected constant speed from 900 to 1,800 rpm.

The company says the engine’s constant operating speed maintains continuous hydraulic flow at all times to deliver crisp hydraulic responsiveness and reduce cycle times; the electric motor delivers torque resulting in fluid operation and a smooth ride.

The machine has four operating speed ranges, but no reverse gear or clutches as direction changes are performed by the electric motor.

The 644K will be on display at booth #2328 at ConExpo-Con/Agg in Las Vegas in March.

Screen Shot 2013-12-16 at 12.27.39 PM

Deere & Co. | johndeere.com

Editor’s note: We’re sharing all 2013 Top RollOuts throughout the month of December, with a different product posted each day. Click here to see them all.

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