Water in the Turntable of an EX 230 LC-5 Excavator – Troubleshooting and Solutions

[MikePhua]

Water infiltration in the turntable of an excavator like the EX 230 LC-5 can lead to significant issues, including damage to critical components and loss of performance. If you're experiencing water inside the turntable of your machine, this article will guide you through the potential causes, troubleshooting steps, and solutions to prevent further damage.

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Understanding the Turntable Issue
The turntable, also known as the swing bearing or slewing ring, is a crucial component of an excavator. It allows the upper structure of the machine to rotate. When water enters the turntable area, it can cause rust, corrosion, and damage to the bearings and gears, which will affect the machine’s overall performance and reliability.
Water can enter the turntable from various sources, including poor seals, damaged gaskets, or leaks from the hydraulic system. Identifying the cause of water infiltration is essential to prevent further damage and extend the life of the excavator.

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Common Causes of Water in the Turntable
Several factors can contribute to water entering the turntable of an EX 230 LC-5 excavator. Here are some common causes:

• Damaged Seals: The turntable's seals are designed to keep water and debris out. If these seals are worn or damaged, water can easily seep into the turntable.
  
• Improper Maintenance: Regular maintenance is crucial to keeping the turntable in good condition. Neglecting lubrication and inspection can cause parts to wear down, increasing the chances of water infiltration.
  
• Leaks from the Hydraulic System: Hydraulic fluid leaks can sometimes carry water into the turntable if there is a breach in the system. This often occurs in wet or muddy conditions where the hydraulic lines or hoses are exposed to water.
  
• Improper Storage or Use: Storing the excavator in areas with excessive water exposure, such as near flooded zones or in areas with poor drainage, can increase the chances of water getting into the turntable.
  

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How to Troubleshoot and Diagnose the Issue
If you suspect that water has entered the turntable, follow these troubleshooting steps to identify and resolve the problem:

1. Inspect the Seals:
   Check the seals around the turntable for any signs of damage, wear, or cracking. Damaged seals are often the primary cause of water entry. Replace any seals that are no longer effective.
   
2. Check the Hydraulic Lines and Hoses:
   Inspect the hydraulic lines running near the turntable for leaks or signs of wear. If you notice any fluid leaking, this could be a potential source of water entry. Pay special attention to areas where the hoses are exposed to the elements.
   
3. Examine the Turntable for Rust or Corrosion:
   If water has been present in the turntable for some time, you may notice signs of rust or corrosion on the swing bearings or gears. This is a clear indicator that water has entered and caused damage. It is essential to address this issue quickly to prevent further degradation.
   
4. Check the Machine’s Storage Environment:
   Consider where the excavator has been stored. If the machine has been exposed to heavy rain or has been stored in an area with poor drainage, water may have accumulated in the turntable. If possible, relocate the machine to a drier area to prevent further water exposure.
   

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Solutions to Fix Water in the Turntable
Once the source of the water has been identified, the following solutions can help fix the issue:

• Replace Damaged Seals:
  If the seals are the problem, replacing them should solve the issue. Be sure to use the correct parts as specified by the manufacturer to ensure a proper fit.
  
• Lubricate and Clean the Turntable:
  After removing the water, clean the turntable thoroughly to remove any rust or corrosion. Apply the recommended grease to lubricate the swing bearing and prevent further water entry. Regular lubrication can help extend the life of the turntable and reduce the risk of water infiltration.
  
• Repair Hydraulic Leaks:
  If water was introduced through a hydraulic leak, repair the leak by replacing damaged hoses or seals. Be sure to properly drain any contaminated hydraulic fluid and replace it with fresh fluid.
  
• Use Proper Storage Techniques:
  Ensure the excavator is stored in a dry area with adequate drainage. Consider using covers or tarps to protect the turntable from direct exposure to rain or moisture.
  

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Preventive Maintenance Tips
To avoid similar issues in the future, follow these preventive maintenance tips for the turntable and hydraulic system:

• Regular Seal Inspections:
  Inspect the turntable seals regularly to ensure they are intact and functioning correctly. Replace worn or damaged seals as soon as possible to prevent water infiltration.
  
• Hydraulic System Checks:
  Periodically check the hydraulic system for leaks and ensure that all hoses are in good condition. Promptly address any leaks to prevent contaminants from entering the system.
  
• Frequent Lubrication:
  Lubricate the turntable regularly according to the manufacturer’s guidelines. This will help keep the swing bearing in good condition and protect against moisture and rust.
  
• Proper Storage:
  Avoid storing the machine in areas with standing water or poor drainage. If necessary, elevate the machine to prevent water from collecting around the turntable area.
  

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Conclusion
Water in the turntable of an EX 230 LC-5 excavator can lead to serious damage if not addressed promptly. By identifying the source of water entry, troubleshooting the issue, and performing necessary repairs, operators can prevent further damage and maintain the performance of their excavators. Regular maintenance, including seal inspections, hydraulic checks, and lubrication, is essential to keep the turntable in optimal condition and extend the life of the machine.