2019 John Deere 644K Wheel Loader

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Availability
Brochure
Year
2019
Manufacturer
John Deere
Model
644K Wheel Loader

Overview

Description

Engine
  • EPA IT4/EU Stage IIIB 6.8-L diesel runs at a constant 900, 1,200, 1,500, or 1,800 rpm. Constant speed reduces engine wear, noise levels, and fuel consumption. Top speed provides maximum power and productivity, while the slower settings increase efficiency.
  • 644K Hybrid delivers up to 25-percent better average fuel efficiency than its conventional IT4 counterpart with a lockup torque converter. In applications such as V-pattern truck loading, fuel savings will be even larger.
Hybrid-Electric Drive
  • Hybrid-electric drive smoothly and efficiently recaptures energy to slow the loader when the operator lets off the accelerator. This lessens the load on the engine and reduces fuel consumption.
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.
Transmission
  • PowerShift™ transmission provides smooth moves through four forward speed ranges.
Maintenance
  • All daily service points, including fuel, are grouped on the left side for quick and convenient ground-level access. Sight gauges enable quick fluid-level checks.
Versatility
  • Equip your loader with optional Z-Bar, High Lift, Tool Carrier, or Parallel Lift linkages.
  • 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 PSS 6090
  • Emission Rating: Tier 4
  • Displacement, ltr (Inches³): 9 (548)
  • Rated Speed, rpm: 1700
  • Engine Output - Net, kW (hp): 173 (232)
  • Torque, Nm (lbf / ft): 1062 (783)
  • Torque Rise, %: 56
  • Transmission Type: Powershift
  • 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.)
  • Wheelbase, mm (ft/in): 3260 (10 ft. 8 in.)
  • Length - Including Bucket, mm (ft/in): 8300 (27 ft. 3 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)): 105.2 (6.95)
  • Axle - Front, ltr (gallons (US)): 22 (5.75)
  • Axle - Rear, ltr (gallons (US)): 22 (5.75)
  • Transmission, ltr (gallons (US)): 23 (6)
  • 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: 130
  • Pump Type: Piston
  • Pump Flow, lt/min (gallons (US) / min): 297 (78)
  • System Pressure, bar (PSI): 251.66 (3650)
Weights
  • Operating Weight, kg (lbs): 18682 (41188)

Specs

Engine

Engine Type
PowerTech PSS 6090
Engine Manufacturer
John Deere
Horsepower
173 kW (232 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
18682 kg (41188 lb.)
Wheelbase
3260 mm (10 ft. 8 in.)

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