A detailed ELECTRIC HOISTSEMI ANNUAL preventive maintenance checklists
Visual Inspection
Electrical System
- Use a torque wrench to check tightness of connections.
- Look for any rust or greenish corrosion on terminals.
- Clean any corroded areas with a suitable electrical cleaner.
- Ensure all connections are properly insulated after inspection.
- Use a multimeter to measure voltage at the power supply.
- Confirm voltage matches the specifications in the manual.
- Check for fluctuations or drops in voltage during operation.
- Document readings for future reference.
- Inspect the entire length of the power cord visually.
- Look for exposed wires, cuts, or areas of wear.
- Use a continuity tester to check for internal damage.
- Replace any damaged cords immediately to ensure safety.
- Test all buttons on the control panel for responsiveness.
- Ensure the emergency stop button functions correctly.
- Check for any warning lights or indicators that may be malfunctioning.
- Clean the control panel surface to ensure visibility of indicators.
- Manually test the circuit breaker by switching it off and on.
- Ensure it resets easily without excessive force.
- Listen for any unusual sounds when operating.
- Check for signs of overheating or burn marks.
- Inspect each fuse visually for signs of damage.
- Use a multimeter to test for continuity in each fuse.
- Replace blown fuses with the correct amperage ratings.
- Document any replacements made during inspection.
- Manually engage each limit switch to verify response.
- Check for proper stop activation at both ends of travel.
- Inspect for any physical obstructions around the switches.
- Adjust the switches as necessary to ensure accurate operation.
- Check the motor housing for excessive heat during operation.
- Listen for unusual sounds like grinding or rattling.
- Inspect motor bearings for signs of wear or lubrication issues.
- Clean any dust or debris from the motor vents.
- Inspect contactor contacts for signs of wear or pitting.
- Check for any discoloration or burning on terminals.
- Test relay functionality by applying power and observing operation.
- Replace any defective components promptly.
- Visually inspect all wiring for visible damage.
- Ensure wires are properly secured and routed away from moving parts.
- Look for signs of overheating like discoloration.
- Replace any damaged wiring immediately.
- Check all grounding connections for tightness and integrity.
- Inspect grounding wires for corrosion or damage.
- Clean any corroded connections with a wire brush.
- Verify continuity of ground connections with a multimeter.
- Test each button on the remote control for responsiveness.
- Check the distance and reliability of the remote signal.
- Inspect the battery compartment for corrosion or leakage.
- Replace batteries if performance is diminished.
- Check maintenance logs for documented electrical problems.
- Identify patterns or recurring issues that need addressing.
- Discuss findings with maintenance team for thorough analysis.
- Plan for any necessary preventative measures.
- Carefully attach a test load to the hoist.
- Operate the hoist through its full range of motion.
- Monitor electrical components for any signs of failure.
- Document the performance under load for future reference.
Mechanical Components
Load Testing
- Select a load equal to the hoist's rated capacity.
- Attach the load securely to the hoist's hook.
- Lift the load slowly to a predetermined height.
- Observe the hoist's performance throughout the lift.
- Listen for any abnormal sounds while the hoist is operating.
- Observe the hoist for excessive vibrations.
- Record any unusual findings for further investigation.
- Ensure the area is clear of personnel during this observation.
- Release the control button to stop the hoist.
- Check if the load remains stable and does not slip.
- Verify that the hoist remains in a fixed position.
- Record any issues related to load security.
Use in Manifestly