John Deere 644K Wheel Loader
Mid-Size Wheel Loaders
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(208) 324-2900
Features
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Bucket Capacity: 3.1–3.2 m³ (4.0–4.25 cu. yd.)
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Operating Weight: 18,682 kg (41,188 lb.)
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Engine Net Power: 173 kW (232 hp)
Specifications
CAPACITIES - Alternator Output, Amp: |
130 |
CAPACITIES - Axle - Front, ltr (gallons (US)): |
22 (5.75) |
CAPACITIES - Axle - Rear, ltr (gallons (US)): |
22 (5.75) |
CAPACITIES - Breakout - Bucket , kgf (lbf): |
15378 (33903) |
CAPACITIES - Bucket Capacity - Smallest, m³ (yd³): |
3.1 (4) |
CAPACITIES - Fuel Tank, ltr (gallons (US)): |
397 (105) |
CAPACITIES - Heaped Capacity, m³ (yd³): |
3.2 (4.25) |
CAPACITIES - Hydraulic Tank, ltr (gallons (US)): |
105.2 (6.95) |
CAPACITIES - Largest bucket capacity, m³ (yd³): |
3.2 (4.25) |
CAPACITIES - Pump Flow, lt/min (gallons (US) / min): |
297 (78) |
CAPACITIES - Pump Type: |
Piston |
CAPACITIES - Ride Control System: |
Optional |
CAPACITIES - System Pressure, bar (PSI): |
251.66 (3650) |
CAPACITIES - System Voltage, V: |
24 |
CAPACITIES - Transmission, ltr (gallons (US)): |
23 (6) |
DIMENSIONS - Ground clearance, mm (inches): |
461 (18.1) |
DIMENSIONS - Height - Over Cab, mm (ft/in): |
3430 (11 ft 3 in) |
DIMENSIONS - Height - Pivot Pin, mm (ft/in): |
4120 (13 ft 6 in) |
DIMENSIONS - Length - Including Bucket, mm (ft/in): |
8300 (27 ft 3 in) |
DIMENSIONS - Reach - At 2130mm 45° Dump, mm (ft/in): |
1610 (5 ft 3 in) |
DIMENSIONS - Turning Circle - Maximum, mm (ft/in): |
13280 (43 ft 7 in) |
DIMENSIONS - Wheelbase, mm (ft/in): |
3260 (10 ft 8 in) |
DIMENSIONS - Width Over tires - Std, mm (ft/in): |
2875 (9 ft 5 in) |
DRIVELINE - Displacement, ltr (Inches³): |
9 (548) |
DRIVELINE - Emission Rating: |
Tier 4 |
DRIVELINE - Engine Manufacturer : |
John Deere |
DRIVELINE - Engine Model: |
PowerTech PSS 6090 |
DRIVELINE - Engine Output - Net, kW (hp): |
173 (232) |
DRIVELINE - Front Differential Type: |
Locking |
DRIVELINE - Parking Brake - Type: |
Wet Multi Disc - Transmission |
DRIVELINE - Rated Speed, rpm: |
1700 |
DRIVELINE - Rear Differential Type: |
Open |
DRIVELINE - Service Brake - Actuation: |
Hydraulic |
DRIVELINE - Service Brake - Location: |
Axle Inboard |
DRIVELINE - Service Brake - Type: |
Wet Disc |
DRIVELINE - Tire size - Standard: |
23.5 R25 |
DRIVELINE - Torque Rise, %: |
56 |
DRIVELINE - Torque, Nm (lbf / ft): |
1062 (783) |
DRIVELINE - Transmission Type: |
Powershift |
WEIGHTS - Operating Weight, kg (lbs): |
18682 (41188) |
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.
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.
Transmission
PowerShift™ transmission provides smooth moves through four forward speed ranges.
Engine
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.
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.
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
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.