1980 Lull 644 Telehandler Overview

[MikePhua]

Introduction to the Lull 644
The Lull 644 telehandler, manufactured around 1980, is a versatile telescopic forklift designed for heavy lifting and material handling tasks across construction, industrial, and agricultural sectors. Renowned for its rugged build and reliability, the 644 model offers strong lifting capacity combined with the reach and maneuverability needed in various jobsite environments.
Key Specifications

• Rated Capacity: Approximately 6,000 lbs (2,722 kg)
  
• Maximum Lift Height: Around 42 feet (12.8 meters)
  
• Operating Weight: Roughly 23,500 lbs (10,646 kg) (without carriage and forks)
  
• Engine: Typically equipped with a Cummins B4.5T turbocharged diesel engine, 4-cylinder, 4.5 liters displacement
  
• Engine Output: Approximately 99 HP (74 kW) with a torque rating near 305 lb-ft at 1,500 rpm
  
• Fuel Tank: Around 46 gallons (174 liters) capacity
  
• Travel Speed: Maximum forward speed of about 20 mph (32 km/h)
  
• Drawbar Pull (loaded): Approximately 18,600 lbs (8,437 kg)
  
• Hydraulic System: Load-sensing dual gear pump, with around 50 gallons (190 liters) system capacity
  
• Controls: Multi-function pilot-operated joystick controls providing precise operation for boom, carriage tilt, auxiliary hydraulics, frame leveling, and horizontal load placement
  

Features and Accessories

• Frame Leveling: Up to 12 degrees, allowing leveling on uneven terrain
  
• Boom Speeds: Around 12.5 seconds to extend or retract without load
  
• Carriage Tilts: Multiple tilt capacities—standard, side tilt ±10°, swing carriage ±45° for load positioning versatility
  
• Attachments: Broad range including pallet forks, lumber forks, block forks, truss booms (with or without winches), buckets for concrete and light materials, and hydraulic-driven sweepers.
  
• Cab Options: Enclosed cab with windshield wipers, rear and side glass, heating and AC options for operator comfort
  
• Lighting: Standard roadway and work lights, with optional strobes and beacons for safety
  
• Tires: Available in foam-filled steel-belt rock tread for durability and puncture resistance
  
• Travel and Maneuverability: Equipped for stable operation with a wheelbase around 131 inches (3.32 m) and a turning radius near 148 inches (3.75 m)
  
• Additional Safety: Operator indicators for alternator charging, air filter and hydraulic filter restrictions, brake pressure, and parking brake status. The Stabil-TRAK™ System aids machine stability during rough terrain operations.
  

Applications and Usage
The 1980 Lull 644 telehandler serves well in environments requiring elevated material placement and heavy load handling with high reach capabilities. Typical usage includes construction sites, warehouse loading, logging, bridge work, and concrete placing.
Maintenance Notes
Maintenance involves regular hydraulic system checks, engine servicing, tire pressure monitoring, and inspection of attachment integrity. Due to the machine’s complexity and load capacity, preventive maintenance helps avoid costly downtime and repairs.
Terminology Explanation

• Telehandler: A vehicle equipped with a telescopic boom that can extend forwards and upwards, used for lifting and placing heavy loads.
  
• Load-Sensing Pump: A hydraulic pump that adjusts flow based on demand, improving efficiency.
  
• Frame Leveling: The ability of the machine’s frame to tilt to keep the operator and load level on uneven ground.
  
• Carriage Tilt: The mechanism that allows the load carriage or forks to tilt, aiding in load positioning and safety.
  
• Drawbar Pull: The pulling force available at the machine’s hitch point, important for traction performance.
  

A Practical Insight
Operators using the Lull 644 highlighted its endurance in rugged conditions, with the Cummins turbo diesel providing dependable power for most lifting tasks. Some operators favored its multiple carriage options for versatile load handling, while the frame leveling feature enhanced safety on slopes. Older units that have been well-maintained demonstrate longevity and reliability, often lasting decades with proper care.
Conclusion
The 1980 Lull 644 telehandler remains a robust and capable machine well-suited for demanding lifting and handling tasks. Its blend of power, range, and operator-friendly controls continues to make it a valuable asset in various heavy equipment fleets. Regular maintenance and using appropriate attachments ensure this machine can perform effectively across diverse industrial applications.