A detailed ELECTRIC HOIST WEEKLY preventive maintenance checklists
1. Safety Precautions
2. Visual Inspection
- Inspect the exterior for scratches, dents, or any unusual marks.
- Look for signs of rust or corrosion on metal surfaces.
- Check for any abnormal noises during operation.
- Look for any bent or misshapen hooks.
- Check for surface cracks or signs of fatigue.
- Ensure hooks are free from excessive wear and meet manufacturer specifications.
- Look for any broken wires or strands in the rope.
- Check for kinks or twists that may affect performance.
- Ensure that the chain links are not worn or elongated.
- Verify that safety guards are securely attached.
- Test safety devices to ensure proper operation.
- Check for any missing components.
- Inspect hydraulic lines for any signs of fluid leakage.
- Look for oil spots or puddles around the hoist.
- Check fittings and connections for tightness.
- Examine brackets for any rust or deterioration.
- Check for cracks or bending in supporting structures.
- Ensure all mounting hardware is secure.
- Check the alignment of limit switches with operational parts.
- Ensure there are no obstructions preventing switch activation.
- Test switches to confirm they engage correctly.
- Inspect the frame for cracks or deformation.
- Look for any signs of wear at stress points.
- Ensure the frame is securely mounted and stable.
- Check all visible bolts and fasteners for tightness.
- Identify any missing components that require replacement.
- Ensure that locking mechanisms are functioning.
- Examine wiring for frayed insulation or exposed conductors.
- Check connections for tightness and secure fit.
- Look for signs of corrosion on terminals.
- Inspect the control surfaces for physical damage.
- Test all buttons and functions for responsiveness.
- Ensure cords and connections are not damaged.
- Inspect brake pads for thickness and wear.
- Check for proper engagement and release of brakes.
- Look for fluid leaks in hydraulic brake systems.
- Check grease fittings and ensure they are filled.
- Look for any signs of dried or cracked lubrication.
- Ensure that all moving parts are properly lubricated.
- Check that all safety labels are intact and readable.
- Ensure warning signs are appropriately located.
- Replace any damaged or faded labels.
3. Mechanical Components
4. Electrical Components
5. Load Testing
- Use a calibrated weight equal to the hoist's rated capacity.
- Securely attach the weight to the hoist's hook.
- Gradually lift the weight to the maximum height.
- Hold the load for a specified duration.
- Lower the weight carefully and safely.
- Listen for any grinding or clunking noises.
- Check for vibration or excessive movement.
- Observe the hoist's movement for hesitations.
- Ensure all gears and pulleys function quietly.
- Record any unusual sounds for further inspection.
- Monitor the lifting speed for consistency.
- Check the stability of the load during the lift.
- Look for any signs of wear or damage.
- Assess the overall operation visually and audibly.
- Note any performance issues for review.
- Use a calibrated weight equal to the hoist's rated capacity.
- Securely attach the weight to the hoist's hook.
- Gradually lift the weight to the maximum height.
- Hold the load for a specified duration.
- Lower the weight carefully and safely.
- Listen for any grinding or clunking noises.
- Check for vibration or excessive movement.
- Observe the hoist's movement for hesitations.
- Ensure all gears and pulleys function quietly.
- Record any unusual sounds for further inspection.
- Monitor the lifting speed for consistency.
- Check the stability of the load during the lift.
- Look for any signs of wear or damage.
- Assess the overall operation visually and audibly.
- Note any performance issues for review.
- Attach a weight close to the hoist's rated capacity.
- Activate the hoist and observe the limit switch operation.
- Ensure the hoist stops lifting when the limit is reached.
- Test multiple times for consistency.
- Document any failures in limit switch functionality.
- Use a stopwatch to measure lift and descent times.
- Compare the times to manufacturer specifications.
- Adjust settings if speed is outside acceptable range.
- Repeat tests under different load conditions.
- Record all speed measurements for analysis.
- Lift a load to maximum height and hold it.
- Check for any movement of the load.
- Ensure brakes engage smoothly and without delay.
- Inspect brake components for wear or damage.
- Document any issues found with the brake system.
- Use a laser thermometer to check component temperatures.
- Record temperatures before, during, and after testing.
- Ensure temperatures do not exceed rated limits.
- Look for signs of overheating, such as discoloration.
- Note any components that run hotter than normal.
- Test the emergency stop feature during operation.
- Simulate overload conditions to check protections.
- Verify that alarms or indicators function correctly.
- Inspect safety mechanisms for proper installation.
- Document the functionality of all safety features.
- Record weights used and test conditions.
- Note any irregularities or safety concerns.
- Include times for lift and descent phases.
- Summarize overall hoist performance.
- Store documentation in maintenance records.
- Conduct tests at various weights, from minimum to maximum.
- Ensure each test follows the same procedures.
- Compare performance metrics across different loads.
- Document results for all load levels tested.
- Identify any discrepancies in performance consistency.
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