Detailed Inspection Procedures
Follow these step-by-step procedures for properly inspecting critical components of your tower crane.
Slew Ring Inspection Protocol
- Clean area around slew ring to remove dirt and debris
- Check for proper lubrication and add grease if needed
- Inspect all slew ring bolts for proper torque (use calibrated torque wrench)
- Mark bolts to identify any movement between inspections
- Examine slew ring teeth for wear, damage, or abnormal patterns
- Check for cracks using appropriate non-destructive testing
- Measure and record bearing backlash/clearance per manufacturer specs
- Verify smooth rotation under no-load conditions
Wire Rope Assessment Method
- Clean rope sections to be inspected of dirt and excess lubricant
- Inspect entire length of wire rope visually and by hand
- Look for broken wires, corrosion, kinks, bird-caging, or crushing
- Pay special attention to sections running over sheaves or drums
- Measure rope diameter at multiple points to check for reduction
- Examine end connections and terminations for security
- Check for proper lubrication along entire length
- Document findings with photographs of any defects
Tower Bolted Connection Check
- Visually inspect all tower section connections
- Check for missing, loose, or damaged bolts and nuts
- Verify torque on sampling of bolts with calibrated wrench
- Look for elongated bolt holes indicating movement
- Inspect for cracking or deformation around connection points
- Check for proper alignment of tower sections
- Verify that locking devices or safety pins are in place
- Document any deficiencies with detailed notes and photos
Load Moment Indicator Testing
- Verify calibration records are current and accurate
- Use known test weights (certified and documented)
- Position test load at various radii per test procedure
- Compare indicator readings with actual load and radius
- Test overload warning and cutout systems
- Verify alarm systems activate at appropriate thresholds
- Test function cuts out at maximum capacity plus allowance
- Document all test results with specific values