Terex RT555-1 Rough Terrain Crane Boom Overview

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Boom Specifications

• The RT555-1 crane features a four-section, full-power telescoping boom with mechanical synchronization, extending from 33 feet to 110 feet (approximately 10.1 to 33.5 meters).
  
• Boom elevation angle ranges from -4° to +76°, allowing significant vertical reach flexibility.
  
• Boom extension and retraction are controlled via a single lever with mechanically synchronized extension sections for smooth operation.
  
• Optional boom configurations include swing-away jib sections with angular offsets of 0°, 15°, and 30°, increasing the crane's operational versatility with maximum jib lengths reaching up to 146 feet for single jib and 170 feet for two-section jib setups.
  

Lifting Capacities

• The crane's maximum lifting capacity is rated at 55 U.S. tons (50 metric tons), making it suitable for heavy-duty lifting tasks.
  
• Load capacities vary depending on boom length and boom angles; rated capacities are available for various boom lengths such as 35 ft, 50 ft, 65 ft, up to 110 ft.
  
• Load charts consider factors such as outrigger spread (22 ft), counterweight configurations (with or without auxiliary winch), and operating conditions (on outriggers or tires).
  
• Stability percentages are noted as approximately 85% on outriggers and 75% on tires, reflecting the crane’s capability in different setups.
  

Hydraulic and Mechanical Systems

• The boom is hydraulically powered with a multi-section synchronized extension mechanism.
  
• Equipped with an optional auxiliary winch capable of carrying loads around 13,100 lbs when installed.
  
• Power is supplied by a high-powered Cummins QSB6.7 six-cylinder diesel engine rated at 185 hp at 2400 rpm.
  
• The crane features a 360-degree continuous rotation capacity powered by a planetary gear reducer and hydraulic motor.
  
• Operator controls include dual-axis electro-proportional joysticks for precise boom and slew control and a graphic load indicator interface for safety and efficiency.
  

Operator Comfort and Safety

• The operator cabin is ergonomically designed with a fully adjustable six-way seat, tinted skylight, and an environment optimized for visibility and operational ease.
  
• Safety features include non-stop 360-degree swing with hydraulic house lock enabled by a foot pedal.
  
• The crane includes rated capacity indicator systems to prevent overload.
  

Terminology

• Telescoping Boom: A boom composed of nested sections that can extend or retract to adjust length.
  
• Mechanical Synchronization: A system that ensures boom sections extend and retract simultaneously and evenly.
  
• Outrigger Spread: The lateral extension of stabilizers to increase operational stability.
  
• Load Chart: A chart displaying safe working loads at varying boom lengths and angles.
  
• Graphic Interface: Visual display providing real-time operational and safety information to the operator.
  

Real-World Application
The Terex RT555-1 is widely used in industrial and construction applications requiring heavy lifting with precise boom control at extended reaches. Its modular boom system and robust hydraulic controls allow operators to safely maneuver heavy loads in challenging environments.
Conclusion
The RT555-1’s boom design offers a blend of reach, lifting capacity, and operational flexibility, aided by precise hydraulic controls and advanced operator interfaces. Its specifications make it a dependable rough terrain crane capable of meeting demanding lifting assignments with enhanced safety and efficiency. Regular maintenance of the hydraulic and mechanical boom components is essential to ensure sustained performance on the job site.