In the landscape of heavy lifting equipment, few machines command as much respect as the Link-Belt LS-518. Although production of this 150-ton truss boom crawler crane officially ended in 1988, its presence remains strong on job sites across the globe. For current owners, operators, and those considering a purchase, a solid grasp of the crane's specifications and operational limits is essential-not just for productivity, but as the foundation of job site safety.
Technical Specifications at a Glance
Specification Details
Lifting Capacity 150 Tons (136,077 kg)
Power Plant Cummins NT855 (245 HP) or Detroit Diesel 8V-71N (246 HP)
Boom Configuration 50 ft to 180 ft standard boom (approx. 15m to 55m)
Maximum Reach Up to 290 ft when combining boom and jib
Counterweight Approximately 90,000 lbs
Ground Pressure: Low ground pressure of 8.2 psi, thanks to 44-inch wide track shoes
Travel Speed Maximum 1 mph (2 kph)
Era of Production: Primarily manufactured from the mid-1970s until 1988
What should be considered when purchasing a Link-Belt LS-518 crane?
Because the Link-Belt LS-518 has been out of production for over three decades, purchasing one on the used market requires a meticulous approach. Unlike buying new equipment, a vintage machine demands a deeper level of scrutiny to ensure it remains safe and reliable.
1. Verify All Documentation
Before inspecting the physical machine, review its paperwork.
Load Charts are Mandatory: Confirm that the official load chart is present inside the cab. Operating without this critical document is not only unsafe but also non-compliant with most safety regulations.
Inspection & Emissions Labels: Look for recent safety certification tags. If the machine will be transported across state lines or internationally, ensure the EPA emissions label on the engine is legible, as faded text can complicate logistics and legal compliance.
2. Assess the Engine and Powertrain
Start the engine and listen carefully. While the Cummins and Detroit Diesel powerplants are known for their longevity, age-related issues are common. Check for coolant leaks around gaskets and listen for irregular knocking sounds that could indicate internal wear.
3. Inspect the Undercarriage Thoroughly
The undercarriage is the workhorse of any crawler crane. For a machine of this vintage, wear on these components is inevitable.
Track Gear: Examine the track shoes, rollers, and idlers for signs of heavy wear or cracking.
Replacement Costs: Be aware that rebuilding or replacing a severely worn undercarriage can represent a significant investment, so factor this into your negotiation.
4. Consider a Load Test
While routine inspections rarely include lifting tests, it is a step worth considering if the crane will be used for critical lifts. Verifying that the Link-Belt LS-518 can handle its rated capacity under load provides the ultimate peace of mind before finalizing a purchase.
5. Understand the Hour Meter
Check the hour meter reading, but treat it as a guideline rather than a definitive measure. On a machine that may be 40 to 50 years old, gauges are often replaced or may stop working. The physical condition of the components should carry more weight than the number on the dial.