JLG 660SJ Telescopic Straight Boom Lift
Sixty-six feet of straight reach. Maximum horizontal extension. No obstacles needed.
66-ft telescopic boom lift. 56 ft horizontal outreach, 500 lb capacity, diesel/LPG dual-fuel, 4WD. Optional SkyPower platform power generator. Built for construction and telecom.
- 66 ft platform height (72 ft working height)
- 56 ft maximum horizontal outreach
- 500 lb platform capacity (2 workers + tools)
- Three-section telescoping boom for maximum reach
- Diesel/LPG dual-fuel — site flexibility
- 4WD with oscillating axle, 45% gradeability
- Optional SkyPower integrated platform generator (110V/230V)
- Proportional control response — smooth, precise boom positioning
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| Drive | 4WD, 45% gradeability |
| Model | 660SJ |
| Power | Dual-fuel: diesel / LPG |
| Boom Type | Telescopic straight, 3-section |
| Manufacturer | JLG Industries |
| Platform Size | 30" × 96" (0.76 m × 2.44 m) |
| Certifications | ANSI/SAIA A92.5, CE EN 280, CSA B354.4 |
| Machine Weight | 26,500 lbs (12,020 kg) |
| Working Height | 72 ft (21.9 m) |
| Platform Height | 66 ft (20.1 m) |
| Turret Rotation | 360° continuous |
| Platform Capacity | 500 lbs (227 kg) |
| Horizontal Outreach | 56 ft (17.1 m) |
Multi-angle views of the JLG 660SJ Telescopic Straight Boom Lift. Click any image to zoom.
Watch the JLG 660SJ Telescopic Straight Boom Lift in action — full installation and operation demo.
⚙️ Load Moment Indicator (LMI)
Boom lifts monitor the combined load from occupants, tools, and dynamic forces as a moment (torque at the turret), not just weight. The LMI accounts for boom angle, extension, and basket position — halting all motion if the tip-over risk exceeds the rated stability threshold before the tipping point is reached.
🔒 Boom Envelope Control
The machine's control system automatically restricts which boom configurations are allowed while driving. Driving with a fully extended telescopic boom at height creates extreme tip-over risk — the system prevents this combination. Articulating booms have configuration-specific drive speed limits enforced by the controller.
🛡️ ANSI A92.5-Compliant Basket
Full-perimeter basket with mid-rail, full-height end rails, self-closing locking gate, and toe board meets ANSI/SAIA A92.5 requirements. A certified D-ring fall arrest anchor rated for 5,000 lbs is standard. Operators must wear a full-body harness with lanyard attached to the D-ring at all times while in the basket — OSHA 1926.453 requirement.
🚨 Dual Emergency Lowering Systems
A hydraulic emergency descent at the platform controls lowers the boom without engine power — a gravity-feed bypass valve independent of all electronics. A second emergency lower is located at the ground control station and can be operated by ground personnel to retrieve a stranded operator. Both systems are tested at pre-shift inspection.
How does this compare?
Telescopic vs. articulating at 60-70 feet: if you're working on a single fixed point — a communications antenna, a bridge truss, a building façade element — a telescopic boom's superior horizontal reach (56 feet vs. 25 feet for articulating) means you need fewer machine moves to complete the job. Telecom contractors installing equipment on 60-foot towers often position the telescopic boom once and swing through the full installation from a single position. For construction scaffolding replacement, exterior window installation, and broadcast antenna work, the 660SJ is the professional's choice.
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