Buying an 80-Ton All-Terrain Crane: Key Considerations for Used Equipment

[MikePhua]

Purchasing a used 80-ton all-terrain crane can offer significant cost savings while providing a powerful and versatile machine for heavy lifting jobs. However, these complex machines require careful evaluation to avoid costly repairs and downtime. This guide outlines essential factors to watch out for, including technical terminology, maintenance tips, and practical advice to ensure a smart investment.
Understanding the 80-Ton All-Terrain Crane

• Definition: An all-terrain crane combines the mobility of truck-mounted cranes with the lifting power of crawler cranes, capable of navigating rough terrain and public roads.
  
• Capacity: 80 tons (approximately 72,500 kg) refers to the maximum lifting capacity under ideal conditions.
  
• Key Systems: Engine and transmission, boom and hoist systems, outriggers for stability, hydraulic systems, and electronic controls.
  

Critical Terminology

• Boom: The extendable arm used to lift loads; often telescopic on all-terrain cranes.
  
• Outriggers: Extendable supports deployed to stabilize the crane during lifts.
  
• Load Moment Indicator (LMI): A safety device that monitors lifting loads and boom angles to prevent overload.
  
• Counterweights: Weights added to the rear of the crane to balance lifting loads.
  
• Swing Mechanism: Allows rotation of the crane’s upper structure (house) independently from the carrier (truck).
  

Key Inspection Points When Buying Used

• Structural Integrity
  • Check boom sections for cracks, corrosion, or bending.
    
  • Inspect the carrier frame and outriggers for damage or welding repairs.
    
  • Look for signs of excessive wear or modifications.
    
• Hydraulic System
  • Examine hoses, cylinders, and fittings for leaks or damage.
    
  • Assess fluid cleanliness and check for contamination.
    
  • Verify proper operation of boom extension, hoist, and slew functions.
    
• Engine and Transmission
  • Review maintenance records for engine servicing, oil changes, and rebuilds.
    
  • Test for unusual noises, smoke, or overheating during operation.
    
  • Check transmission shifting smoothness and clutch condition.
    
• Safety Devices and Controls
  • Test Load Moment Indicator and limit switches for accurate performance.
    
  • Ensure brakes, steering, and emergency stop functions work reliably.
    
  • Verify electronic displays and control panels are fully functional.
    
• Operational Testing
  • Conduct load tests if possible to confirm lifting capacity and stability.
    
  • Observe machine maneuverability on various terrains.
    
  • Check for smooth operation of swing and boom controls.
    

Additional Recommendations and Solutions

• Documentation Review
  • Obtain full service and repair history to identify recurring issues.
    
  • Verify ownership and title clearances to avoid legal complications.
    
• Common Warning Signs
  • Unexplained welds or patched areas may indicate past damage.
    
  • Hydraulic leaks or slow cylinder response signal costly repairs ahead.
    
  • Excessive engine smoke or poor fuel efficiency can hint at internal problems.
    
• Budget for Post-Purchase Maintenance
  • Plan for replacement of wear items such as wire ropes, hydraulic seals, and filters.
    
  • Consider costs for inspections and certifications required for safety compliance.
    

Case Story
A construction company acquired a used 80-ton all-terrain crane that appeared well-maintained but failed to identify worn hydraulic hoses during the inspection. Shortly after purchase, the crane suffered a hydraulic leak causing significant downtime and expensive repairs. This experience underscored the importance of thorough hydraulic system checks and test lifts before finalizing the purchase.
Practical Tips for Buyers

• Bring an experienced crane technician or inspector during evaluations.
  
• Request a full operational demonstration under load conditions.
  
• Research typical maintenance costs and availability of parts for the model.
  
• Negotiate price based on inspection findings and potential repair expenses.
  

Summary
Buying a used 80-ton all-terrain crane demands meticulous attention to structural condition, hydraulic health, engine and transmission status, and safety system functionality. Proper inspection, documentation review, and operational testing help prevent unexpected costs and maximize machine reliability. With informed evaluation and professional guidance, purchasing a used crane can be a cost-effective way to enhance lifting capabilities on demanding job sites.