Understanding Deck Crane Boom Failures

A deck crane is essential for efficient operations in ports and bulk material handling. When the boom fails to rise, it can lead to significant delays and increased operational costs. Let us explore the common causes of these failures and their respective solutions.

I. Hydraulic System Problems are the Most Common

Hydraulic system malfunctions account for over 70% of all failures. These issues primarily manifest as:

1. Damaged Control Valve: A broken or stuck internal spring in the luffing valve prevents the hydraulic oil from pushing the boom upward. This issue requires valve body replacement.

   
   

2. Broken Hydraulic Motor: Internal parts, such as the return plate, may break, causing hydraulic oil leakage and insufficient pressure. Disassembly and replacement of the motor are necessary to resolve this issue.

   
   

3. Contaminated Hydraulic Oil: Impurities or deterioration in the oil can block oil passages or wear parts. Regular filter cleaning and oil changes are essential to maintain system integrity.

   
   

II. Poor Heat Dissipation Triggers a Chain Reaction

High temperatures can cause the system to automatically shut down for protection. The following factors contribute to poor heat dissipation:

1. Oil Cooler Failure: If the fan direction is reversed (for example, a suction type mistakenly installed as a blower type), heat dissipation efficiency drops by more than 50%. Adjusting the motor phase sequence can rectify this issue.

   
   

2. Hydraulic Oil Overheating: When the temperature exceeds 80℃, it triggers control system lockout. The normal operating temperature should be ≤45℃. It is crucial to check the cooling fan and oil circuit regularly.

   
   

III. Mechanical Component Seizure Due to Lack of Lubrication

Insufficient lubrication directly hinders movement and can lead to severe mechanical failures. Key issues include:

1. Bearing Dry Friction: A blockage in the grease channel of the boom bearing can lead to abnormal noise and jamming. Clearing the oil channel with a high-pressure pump is necessary to restore functionality.

   
   

2. Pulley Corrosion: Lack of lubrication can cause wire ropes to break strands or jump out of grooves. Regular grease application is required to prevent these issues.

   
   

Conclusion

In summary, understanding the causes of deck crane boom failures is vital for effective maintenance. By addressing hydraulic system problems, ensuring proper heat dissipation, and maintaining adequate lubrication, operators can significantly reduce downtime and enhance operational efficiency.

By implementing these solutions, we can ensure that our equipment remains operational and efficient. Regular maintenance and monitoring are key to preventing these issues from arising.

For further information on heavy-duty port and bulk material handling equipment, please visit TianLi Heavy Industries.