644K Wheel Loader
  • Net Power: 173 kW (232 hp) @ 1,700 rpm
  • Bucket Capacity: 3.1–3.2 m³ (4.0–4.25 cu. yd.)
  • Operating Weight: 18 682 kg (41 188 lb)

Features

  • Bucket Capacity: 3.1–3.2 m³ (4.0–4.25 cu. yd.)

  • Operating Weight: 18,682 kg (41,188 lb.)

  • 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.

  • Features

    Features

    • Bucket Capacity: 3.1–3.2 m³ (4.0–4.25 cu. yd.)

    • Operating Weight: 18,682 kg (41,188 lb.)

    • Engine Net Power: 173 kW (232 hp)

  • Specifications

    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)
  • Details

    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.

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