Professional maintenance and repair of cranes are essential for the safety and service life of equipment. The following are knowledge and suggestions on crane maintenance and repair:
1. Daily inspection
Hydraulic system: Check whether the hydraulic oil level is sufficient, ensure that the oil is clean, and observe whether there is leakage.
Wire rope and hook: Check whether the wire rope is worn or broken, whether the hook is cracked or deformed, and whether the connection of the sling is firm.
Lubricated parts: All moving and rotating parts, such as pulleys, bearings, chains, etc., should be lubricated regularly to prevent wear and jamming.
Electrical system: Ensure that the electrical circuit and controller are free of aging, short circuit, poor contact and other problems, and check whether the electrical cabinet has signs of overheating.
2. Periodic maintenance
Lubrication maintenance: According to the equipment manual, regularly replace and add lubricating grease to ensure the smooth operation of gears, bearings and other components.
Hydraulic oil replacement: The oil in the hydraulic system is generally replaced every 6-12 months to prevent impurities from precipitating and affecting the system operation.
Brake system inspection: Regularly check and replace brake pads to ensure that the brake system can work normally in an emergency.
Steel structure inspection: Check whether the main structure of the crane (such as the boom and main beam) has cracks, deformation or corrosion, and repair or replace it if necessary.
3. Professional maintenance
Wire rope and hook: If the wire rope is found to be worn, corroded, or broken, it must be replaced immediately. Once the hook is deformed, cracked, or worn beyond the limit, it should be replaced in time.
Electrical component maintenance: If the electrical components such as motors, relays, and controllers fail, professional electricians are required to replace and repair them to ensure that all electrical components work properly.
Hydraulic system maintenance: If the hoses, valves, pumps and other components of the hydraulic system are damaged or leaking, they must be replaced and sealed by professionals to avoid system pressure loss.
Rotating and transmission parts: If the rotating bearings or transmission gears are found to be severely worn, they must be replaced immediately to prevent affecting the operating accuracy and stability of the equipment.
4. Regular inspection and calibration
Load test: Perform load tests regularly to verify whether the actual load-bearing capacity of the crane meets the standards and ensure safe use.
Safety device inspection: including limit switches, overload protection devices, emergency stop buttons, etc., all need to be regularly inspected and calibrated to ensure that these devices can function in dangerous situations.
5. Seasonal maintenance
Winter maintenance: In cold seasons, hydraulic oil and lubricating oil may become thicker due to lower temperature. Low-temperature lubricating oil needs to be used, and the heating device of the equipment should be checked to see if it is normal.
Summer maintenance: In high-temperature seasons, special attention should be paid to the heat dissipation of hydraulic and electrical systems to avoid damage to the equipment due to overheating.
6. Recording and tracking
Maintenance records: Detailed information should be recorded for each maintenance and repair, including replaced parts, types of lubricating oil used, inspection results, etc., for future tracking.
Fault records: The cause of the fault, the handling process and the spare parts used should be recorded for each repair, and a maintenance history file of the equipment should be established to better understand the equipment status.
7. Follow the manufacturer's manual
Each crane model has different maintenance requirements. Be sure to follow the instruction manual and maintenance manual provided by the manufacturer and operate according to the recommended maintenance cycle and methods.
Through regular and professional maintenance and repair, the service life of the crane can be effectively extended, work efficiency can be improved, and the safety of the operation can be ensured.
