A detailed Crawler Crane QUARTERLY preventive maintenance checklists
1. Safety Precautions
2. Visual Inspection
3. Mechanical Systems
4. Electrical Systems
5. Hydraulic Systems
6. Lubrication
- Refer to the manufacturer's manual for lubrication points and specifications.
- Use the recommended type and amount of lubricant for each moving part.
- Ensure all lubrication points are accessible and clean before application.
- Locate all grease points specified in the manufacturer's manual.
- Use a grease gun to refill each point until grease emerges from the seals.
- Wipe away any excess grease to prevent contamination.
- Examine each lubrication point for dirt, debris, or old grease buildup.
- Clear any blockages using appropriate tools without damaging components.
- Ensure all points are free-flowing before applying lubricant.
- Cross-reference lubricants with the manufacturer's specifications.
- Check lubricant containers for proper labels and expiration dates.
- Avoid mixing different types of lubricants unless specified.
- Use a clean cloth to wipe away excess grease from surfaces.
- Ensure that all areas around lubrication points are free from old lubricant.
- Dispose of waste materials in accordance with environmental guidelines.
- Apply lubricant evenly around the slew ring as specified.
- Manually rotate the slew ring to distribute lubricant evenly.
- Check for any obstructions that may hinder smooth operation.
- Inspect seals and gaskets for cracks, tears, or signs of wear.
- Replace any damaged seals or gaskets before lubricating.
- Ensure a proper seal to prevent contamination and leaks.
- Inspect lubrication points for signs of leaking lubricant.
- Identify the source of any leaks and repair as necessary.
- Document leak issues and resolutions in the maintenance log.
- Record the type and amount of lubricant applied to each component.
- Include the date and technician's name in the log.
- Review records regularly to track lubricant usage trends.
- Check all lubrication fittings for cracks or damage.
- Replace any damaged fittings with compatible parts as needed.
- Ensure fittings are securely attached after replacement.
- Inspect tools for cleanliness and proper functionality.
- Clean any tools that show signs of dirt or contamination.
- Check that lubricant containers are sealed and undamaged.
- Review the lubrication schedule against the manufacturer's guidelines.
- Adjust the schedule based on usage, environment, or manufacturer updates.
- Document any changes made to the lubrication schedule.
- Analyze lubrication logs for patterns or recurring issues.
- Identify components that require more frequent lubrication.
- Report any findings to maintenance management for further action.
7. Functionality Tests
- Attach calibrated weights according to the crane's specifications.
- Gradually lift the load to the required height.
- Monitor and record any deviations in lifting performance.
- Ensure all safety protocols are followed during the test.
- Operate the crane through its full range of motion.
- Observe for any unusual noises or resistance.
- Check for smooth transitions in all movements.
- Document any restrictions or anomalies encountered.
- Manually test each limit switch at its designated position.
- Ensure the crane stops as expected when limits are reached.
- Inspect safety devices for proper installation and function.
- Report any malfunctioning switches immediately.
- Select a weight appropriate for testing accuracy.
- Lift and lower the weight, noting any discrepancies.
- Check the load indicators for correct readings.
- Verify that the crane performs consistently with repeated lifts.
- Engage the emergency stop switch.
- Verify that all crane operations cease immediately.
- Reset the emergency stop to restore functionality.
- Repeat the test multiple times for consistency.
- Deploy the outriggers to their full extension.
- Check for stability and levelness.
- Retract the outriggers and confirm smooth operation.
- Inspect for any abnormal sounds or resistance.
- Test each joystick and button for responsiveness.
- Observe indicator lights for proper illumination.
- Check for any error messages on the display.
- Ensure all controls are correctly labeled and accessible.
- Operate the winches and observe for smooth operation.
- Check the load capacity of hooks under no load.
- Inspect all connections for wear or damage.
- Ensure safety latches are functional.
- Activate anti-collision systems during operation.
- Check for alerts or alarms as obstacles approach.
- Test in various operational scenarios.
- Ensure system resets after activation.
- Position the crane on a slight slope.
- Operate in all directions to test stability.
- Monitor for any signs of tipping or instability.
- Document performance under various angles.
- Test hand signals in various distances and lighting.
- Check radio communication clarity and range.
- Confirm all crew members understand signals.
- Practice emergency communication scenarios.
- Locate the load chart in the operator's cabin.
- Check for any damage or obstructions.
- Ensure text is clear and readable.
- Confirm the chart is up to date with specifications.
- Test all operational alarms during crane use.
- Simulate emergency conditions to test alarm response.
- Check volume levels of alarms.
- Ensure alarms are distinct and recognizable.
- Inspect hydraulic hoses and connections for signs of wear.
- Check fluid levels before and after operation.
- Look for any fluid pooling on the ground.
- Test hydraulic functions while observing for leaks.
Use in Manifestly