2019 John Deere 644K Hybrid Wheel Loader

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Year
2019
Manufacturer
John Deere
Model
644K Hybrid Wheel Loader

Overview

Description

Engine
  • Ash-service intervals for the diesel particulate filter (DPF) are condition based, so changing it may not be necessary until the first engine overhaul. Intervals can be extended further depending on application, regular maintenance practices, and the use of recommended fluids and lubricants.
  • Our FT4/Stage IV diesels delivers generous displacement, power, and lugging ability.
Quad-Cool™
  • Quad-Cool places the radiator, air-conditioner condenser, intercooler, and hydraulic, transmission, and optional axle coolers in a unique boxed configuration that's isolated from engine heat.
  • Optional programmable fan reverses, ejecting debris from radiator and cooler cores.
Transmission and Axles
  • With ride control, the lift cylinders act as shock absorbers, cushioning bumps to allow these loaders to navigate rough ground more quickly without losing their loads.
  • Automatic differential lock engages as soon as a tire begins to slip. It's ideal for inexperienced operators or applications requiring high traction, such as stockpiling silage, plowing snow, and handling pipe.
Maintenance
  • Lockable compartment swings open wide, offering convenient ground-level access to remote-start battery terminals and the electrical-disconnect switch.
  • Conveniently located, easy-to-read sight gauges and see-through reservoirs let you check transmission, hydraulic, coolant, and windshield washer fluid levels at a glance.
Controls
  • Optional joystick steering is ideal for V-pattern truck loading.
  • Choose single-lever joystick or two-lever fingertip pilot-operated hydraulic controls.
Versatility
  • Equip your loader with optional Z-Bar, High Lift, Tool Carrier, or Parallel Lift linkage
  • Worksite Pro couplers make attachment switchover easy to get even more out of your machine.
Safety & Security
  • Sealed-switch module keeps out dust and moisture while eliminating nearly 100 wires. Prevent unauthorized machine operation with keyless-start requiring a numeric pass code.
  • Optional rearview camera and radar object-detection system
Driveline
  • Engine Manufacturer: John Deere
  • Engine Model: PowerTech PSX 6068
  • Emission Rating: Interim Tier 4
  • Displacement, ltr (Inches³): 6.8 (414)
  • Rated Speed, rpm: 1700
  • Engine Output - Net, kW (hp): 171 (229)
  • Torque, Nm (lbf / ft): 991 (730)
  • Torque Rise, %: 19
  • Transmission Type: Powershift w/Hybrid-Electric Drive
  • Front Differential Type: Locking
  • Rear Differential Type: Open
  • Tire size - Standard: 23.5 R25
  • Service Brake - Type: Wet Disc
  • Service Brake - Location: Axle in.board
  • Service Brake - Actuation: Hydraulic
  • Parking Brake - Type: Wet Multi Disc - Transmission
Dimensions
  • Height - Over Cab, mm (ft/in): 3430 (11 ft. 3 in.)
  • Length - Including Bucket, mm (ft/in): 8300 (27 ft. 3 in.)
  • Wheelbase, mm (ft/in): 3260 (10 ft. 8 in.)
  • Ground clearance, mm (inches): 461 (18.1)
  • Width Over tires - Std, mm (ft/in): 2875 (9 ft. 5 in.)
  • Height - Pivot Pin, mm (ft/in): 4120 (13 ft. 6 in.)
  • Reach - At 2130mm 45° Dump, mm (ft/in): 1610 (5 ft. 3 in.)
  • Turning Circle - Maximum, mm (ft/in): 13280 (43 ft. 7 in.)
Capacities
  • Fuel Tank, ltr (gallons (US)): 397 (105)
  • Hydraulic Tank, ltr (gallons (US)): 106 (28)
  • Axle - Front, ltr (gallons (US)): 22 (5.75)
  • Axle - Rear, ltr (gallons (US)): 22 (5.75)
  • Transmission, ltr (gallons (US)): 37.9 (10)
  • Heaped Capacity, m³ (yd³): 3.2 (4.25)
  • Bucket Capacity - Smallest, m³ (yd³): 3.1 (4)
  • Largest bucket capacity, m³ (yd³): 3.2 (4.25)
  • Breakout - Bucket , kgf (lbf): 15378 (33903)
  • Ride Control System: Optional
  • System Voltage, V: 24
  • Alternator Output, Amp: 100
  • Pump Type: Piston
  • Pump Flow, lt/min (gallons (US) / min): 297 (78)
  • System Pressure, bar (PSI): 251.66 (3650)
Weights
  • Operating Weight, kg (lbs): 18341 (40435)

Specs

Engine

Engine Type
PowerTech PSX 6068
Engine Manufacturer
John Deere
Horsepower
171 kW (229 hp)
Rated RPM
1700 rpm
Fuel Capacity
397 L (105 gal.)

General

Bucket Capacity
3.2 m³ (4.25 yd³)
Tire Size
23.5 R25
Length
8300 mm (27 ft. 3 in.)
Width
2875 mm (9 ft. 5 in.)
Weight
18341 kg (40435 lb.)
Wheelbase
3260 mm (10 ft. 8 in.)

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