John Deere 644K Hybrid Wheel Loader

Description

Models

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.

Engine

Our FT4/Stage IV diesels delivers generous displacement, power, and lugging ability.

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.

Controls

Choose single-lever joystick or two-lever fingertip pilot-operated hydraulic controls.

Optional joystick steering is ideal for V-pattern truck loading.

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.

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.

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.

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

Specifications

• CAPACITIES - Alternator Output, Amp: 100
• 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)): 106 (28)
• 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)): 37.9 (10)
• 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): 6.8 (414)
• DRIVELINE - Emission Rating: Interim Tier 4
• DRIVELINE - Engine Manufacturer : John Deere
• DRIVELINE - Engine Model: PowerTech PSX 6068
• DRIVELINE - Engine Output - Net, kW (hp): 171 (229)
• 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, %: 19
• DRIVELINE - Torque, Nm (lbf / ft): 991 (730)
• DRIVELINE - Transmission Type: Powershift w/Hybrid-Electric Drive
• WEIGHTS - Operating Weight, kg (lbs): 18341 (40435)

Features

• Bucket Capacity: 3.12–3.2 m³ (4.0-4.25 cu. yd.)
• Operating Weight: 18,341 kg (40,436 lb.)
• Engine Net Power: 171 kW (229 hp)

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