John Deere 644G Specifications and Key Features
The John Deere 644G loader is equipped with a powerful 170 horsepower engine that provides reliable performance across demanding tasks. This loader can lift up to 12,000 pounds, making it suitable for handling large, heavy loads with ease. The hydraulic system ensures fast and smooth lifting, increasing productivity on the job site.
With a hydrostatic drive system, the 644G ensures precise control, even in challenging conditions. The loader’s 24-foot turning radius allows it to maneuver in tight spaces, while the advanced axle system enhances stability, especially on uneven terrain.
Operators will appreciate the ergonomic design of the cab, which reduces fatigue during long working hours. The controls are intuitive, allowing for easy operation and adjustment. The fuel tank capacity ensures that the machine can run longer without needing frequent refuels, increasing uptime.
John Deere 644G Specifications
The John Deere 644G loader is designed for high productivity in demanding environments. Powered by a 6-cylinder, turbocharged engine, it delivers 120 horsepower, offering a reliable solution for tough tasks.
The operating weight of the 644G is approximately 18,600 kg, providing a solid base for lifting and moving heavy loads. With a bucket capacity ranging from 2.5 to 3.0 cubic meters, it is capable of handling a variety of materials, from dirt to gravel and construction debris.
The loader’s transmission features a powershift system with four forward and three reverse gears, allowing smooth shifting and efficient power delivery. The hydraulic system operates at a flow rate of 180 l/min, ensuring fast and consistent bucket movements.
Its maximum lift height is 3.1 meters, with a breakout force of 9,500 kg, enabling it to lift large loads with ease. The 644G also has an articulated steering mechanism, providing tight turning radii for enhanced maneuverability in confined spaces.
The 644G is equipped with a spacious, comfortable operator cabin designed to reduce fatigue. It includes adjustable seating, ergonomic controls, and excellent visibility, ensuring that operators can maintain focus and productivity throughout the workday.
Engine Specifications and Performance
The John Deere 644G is equipped with a robust engine that delivers substantial power for demanding tasks. The engine model is the John Deere 4045TF150, a 4.5-liter, 4-cylinder turbocharged diesel engine.
Key engine specifications:
- Engine displacement: 4.5 liters
- Cylinders: 4
- Rated power output: 115 horsepower (86 kW) at 2,200 rpm
- Maximum torque: 350 lb-ft (474 Nm) at 1,400 rpm
- Fuel system: Mechanical injection
- Cooling system: Liquid-cooled
For optimal performance, ensure regular maintenance of the cooling system and air filtration. This will keep the engine running smoothly and avoid unnecessary wear during intensive operations.
The engine offers excellent fuel efficiency, contributing to a balanced power-to-consumption ratio, which makes it suitable for long work hours in construction and material handling tasks. The turbocharging system enhances the engine’s performance, providing more power without sacrificing fuel economy.
For better performance, use high-quality diesel fuel and keep the engine clean to prevent any blockages in the intake system. Proper engine oil maintenance is also crucial for smooth operation and to extend engine life.
The John Deere 644G engine delivers consistent power, ensuring that the machine operates efficiently even under heavy loads. Whether for digging, lifting, or pushing, the engine’s torque and horsepower are designed to meet demanding conditions effectively.
Dimensions and Weight of the 644G Loader
The John Deere 644G loader has a length of 24 feet 9 inches (7.54 meters) with the bucket attached, and a width of 8 feet 5 inches (2.57 meters). Its height reaches 12 feet 1 inch (3.68 meters), ensuring an optimal working height for various tasks. The loader’s ground clearance is 15 inches (38 cm), which supports stability on uneven surfaces.
Weighing 21,000 pounds (9,525 kg), the 644G is designed to handle heavy lifting and digging without compromising maneuverability. The operating weight allows for impressive lifting capacity while maintaining balance, making it suitable for construction, mining, and other heavy-duty tasks.
The loader’s wheelbase is 8 feet 9 inches (2.67 meters), which contributes to its solid handling and smooth ride across different terrains. These dimensions and weight specifications are tailored to deliver high performance in various working conditions.
Hydraulic and Transmission Systems in the 644G
The 644G John Deere loader is equipped with a fully integrated hydraulic and transmission system, ensuring optimal performance in heavy-duty applications. The hydraulic system delivers up to 23,000 psi for lifting and steering tasks, offering reliable control over attachments and load management. Its high-efficiency piston pumps ensure smooth operation, even under demanding conditions.
The transmission features a power-shift design with four forward and three reverse gears, offering seamless shifting for enhanced maneuverability. The transmission is coupled with a Torque Converter, providing better control over speed and power, particularly in tough terrain. The system includes a standard electronic clutch to reduce wear and extend the lifespan of critical components.
A key recommendation for maintaining system efficiency is regular fluid checks and replacements, particularly for the hydraulic fluid, which can degrade over time and lead to suboptimal performance. Ensure that the transmission filter is replaced as part of scheduled maintenance to maintain smooth shifting and prevent clogging that could cause gear slippage.