John Deere 644G Wheel Loader Specifications and Features
Operating Weight: The John Deere 644G wheel loader has an operating weight of 18,485 kg, making it highly capable for heavy-duty tasks in construction and material handling. This weight ensures stability and power during operation on various job sites.
Engine Power: Equipped with a 6.8L, 6-cylinder turbocharged engine, the 644G delivers 155 horsepower at 2,000 RPM. This engine power is optimized for lifting, loading, and pushing operations with ease, making it a reliable choice for demanding projects.
Bucket Capacity: The standard bucket capacity of the 644G is 2.6 cubic yards. This size is ideal for handling large volumes of materials efficiently, contributing to faster job completion while maintaining high productivity levels.
Hydraulic System: The 644G’s hydraulic system operates at a flow rate of 200 L/min, providing the strength needed for powerful lifting and loading tasks. Its high-flow hydraulics support quick cycle times and reduce downtime, improving overall machine efficiency.
Transmission: With a PowerShift transmission, the John Deere 644G offers smooth and responsive shifts under varying load conditions. This transmission type helps maintain traction and control, especially on uneven or soft ground.
John Deere 644G Wheel Loader Specifications
The John Deere 644G wheel loader provides strong performance with a 4.5L 6-cylinder engine, delivering 134 horsepower. The machine’s reliable power is complemented by a torque converter transmission with three forward and three reverse gears, ensuring smooth operation across various terrains.
The operating weight of the 644G is 19,000 kg, and it offers a bucket capacity of 2.7 cubic meters. This loader is equipped with an advanced hydraulic system that provides a maximum lift capacity of 3,600 kg at full height, offering ample power for demanding tasks.
- Engine: 4.5L 6-cylinder diesel engine
- Horsepower: 134 hp (100 kW)
- Transmission: 3 forward and 3 reverse gears
- Operating Weight: 19,000 kg
- Bucket Capacity: 2.7 m³
- Maximum Lift Capacity: 3,600 kg
- Hydraulic System: Advanced, high-flow hydraulics for efficient operation
This loader’s 3.25-meter turning radius enhances maneuverability in tight spaces, making it suitable for various construction and material handling tasks. Its stability and durability are achieved through a rigid frame design, ideal for long hours of operation in challenging environments.
The machine is equipped with large, durable tires that provide excellent traction, further improving performance on rough and uneven surfaces. The 644G’s robust design is complemented by its ease of maintenance, with accessible service points and extended intervals between oil changes, reducing downtime.
Engine Performance and Power Output of the John Deere 644G
The John Deere 644G wheel loader is equipped with a robust 6.8L 6-cylinder engine that delivers consistent power for demanding tasks. The engine is capable of producing 140 horsepower at 2,000 rpm, ensuring reliable performance in various operational conditions.
With an operating weight of approximately 18,000 kg, the loader’s engine provides ample power to lift heavy loads and maintain optimal speeds even under full load. The engine’s torque output of 560 lb-ft contributes to its impressive performance in tough working environments, especially when dealing with heavy digging or lifting tasks.
The fuel system, paired with the high-efficiency turbocharger, optimizes fuel consumption without compromising power, allowing the 644G to run for longer periods with fewer refueling breaks. The engine’s design also minimizes emissions, meeting environmental standards while maximizing fuel efficiency.
For smooth operation, the engine is integrated with a hydraulic drive system that ensures seamless power transfer, enhancing productivity. The transmission system, paired with the engine’s performance, enables quick acceleration and reliable braking for safe operation on various terrains.
Regular maintenance of the engine, including monitoring of oil levels and air filters, is vital for sustaining its performance. Keeping the cooling system clean and functioning properly also ensures that the engine runs at an optimal temperature, preventing overheating during extended use.
Hydraulic System and Load Handling Capabilities of the 644G
The John Deere 644G wheel loader is equipped with a powerful hydraulic system designed to ensure fast and precise load handling. The system features a high-flow hydraulic pump capable of delivering impressive pressure and flow rates, making lifting and loading operations more efficient and smooth.
With a hydraulic pump rated at 202 l/min (53.3 gpm) and a pressure setting of up to 20,000 psi (137.9 MPa), the 644G can handle heavy loads with ease. This high-pressure output allows for quick cycle times, reducing downtime between operations. The hydraulics work seamlessly with the loader’s lift arms and bucket for optimal digging, lifting, and carrying capabilities.
The 644G is capable of lifting loads up to 6,000 kg (13,227 lbs) at full height. The lift and tilt mechanisms are designed to provide precise control, allowing operators to handle materials efficiently, whether loading or unloading. The quick coupling system enables easy attachment changes, further enhancing the loader’s versatility on different job sites.
The loader’s hydraulic system is supported by a cooling package that maintains optimal performance even during extended periods of heavy use. Regular maintenance of the hydraulic system ensures long-term reliability, preventing costly repairs and ensuring peak productivity on demanding tasks.
Fuel Capacity and Consumption Rates for the John Deere 644G
The John Deere 644G wheel loader is equipped with a fuel tank that holds up to 185 gallons (700 liters) of fuel. This capacity ensures extended operational hours for heavy-duty tasks without frequent refueling stops.
Fuel consumption for the 644G varies depending on load, terrain, and operational conditions. On average, the machine consumes around 6 to 8 gallons per hour (22 to 30 liters per hour) during typical work cycles. This rate can be higher when working at full load or in challenging environments.
To optimize fuel efficiency, regular maintenance is key. Ensuring that the air and fuel filters are clean, monitoring tire pressure, and using the appropriate lubricants will help minimize fuel usage over time. Additionally, operators should focus on smooth and steady operation to avoid unnecessary fuel wastage.
The fuel consumption also fluctuates based on the work performed. For instance, tasks that require frequent lifting and carrying of heavy materials may increase fuel consumption. Conversely, using the loader for lighter tasks at a steady pace will reduce overall fuel use.