JLG 660SJC Telescopic Boom Lift Overview

[MikePhua]

Machine Description
The JLG 660SJC is a telescopic crawler boom lift designed for demanding jobsites requiring extended reach and maneuverability over rough terrain. Part of JLG's 600 crawler series, it offers a balance of height, outreach, and platform capacity with advanced control systems for operator safety and comfort.
Performance and Dimensions

• Maximum platform height: Approximately 65 feet 7 inches (19.99 meters).
  
• Working height can reach about 71 feet 7 inches with horizontal outreach near 57 feet.
  
• Platform capacity: Restricted capacity of 750 lbs (340 kg) and unrestricted at 550 lbs (249 kg).
  
• Platform size: Spacious 0.91 m x 1.83 m (3 ft x 6 ft) low-mount platform with hydraulic 180-degree rotation.
  
• Jib length: Around 1.83 meters with articulation range of 130 degrees (+70°/-60°).
  
• Machine weight: Approximately 12,300 kg (27,100 lbs).
  
• Ground clearance of about 15 inches (38 cm) and zero turning radius enhance mobility.
  
• Gradeability of 55%, well suited for steep terrains.
  
• Steel tracks measuring 20 inches wide offer solid traction and durability.
  

Key Features

• Single drive/steer joystick allows for one-handed operation facilitating ease of movement and control.
  
• Oscillating axle provides superior traction on uneven or mud-covered surfaces.
  
• Multiple speed controls for telescope and platform rotation.
  
• Load sensing hydraulic system optimizes power for smooth and responsive boom operation.
  
• Comprehensive safety features including engine distress warning/shutdown system, tilt alarm, and JLG Skyguard active system for enhanced operator protection.
  
• Swing-out engine tray and gull-wing hoods for easy machine service and maintenance access.
  

Operator Comfort and Control

• Ergonomic controls with full proportional drive joystick control and integrated thumb steer switch.
  
• Side entry platform with drop bar mid rail enhances safety in boarding.
  
• Platform console equipped with machine status light panel and 12V DC auxiliary power.
  
• hydraulic oil cooler ensures stable hydraulic temperature for consistent machine performance.
  
• Durable cast aluminum control box adds to machine longevity.
  

Applications

• Designed for construction, industrial maintenance, and any operation demanding high-reach access on rough or muddy ground.
  
• Suitable for narrow jobsite access due to zero tail swing and compact width.
  
• Equipped for versatility with a variety of attachments for lifting, maintenance, and positioning tasks.
  

Glossary of Terms

• Telescopic Boom: Boom that extends linearly to increase reach distance.
  
• Oscillating Axle: Axle design allowing wheel movement relative to chassis for better terrain adaptability.
  
• Load Sensing: Hydraulic system adjusting flow based on demand to improve efficiency.
  
• Gradeability: Ability to ascend slopes expressed as a percentage.
  
• Swing-Out Engine Tray: Service feature allowing easier access to engine components.
  

Conclusion
The JLG 660SJC crawler boom lift artfully combines reach, power, and off-road mobility with thoughtful operator-focused design and safety features. Ideal for tough terrains and elevated workspaces, it helps crews accomplish projects efficiently even in confined or challenging environments. Its combination of hydraulic advances and robust chassis components positions it as a compelling choice for businesses prioritizing high performance and reliability in their boom lift fleets.