Troubleshooting Excavator Oil Leaks: 5 Key Reasons and 4 Judgment Methods

Oil leaks in excavators can lead to severe consequences, such as engine component deformation and potential engine failure. Identifying the presence of water in the engine oil is crucial to preventing further damage. In this blog, we'll explore the five major causes of oil ingress and four effective methods to detect water in engine oil.

 

5 Major Causes of Oil Ingress:

 

1. Engine Water Plugging and Leaking:

Corrosion of scale can cause the water plug to rust through, allowing cooling water to enter the oil channel. Regularly inspecting for water blockages is essential to avoid this common cause of oil ingress.

 

2. Damaged Oil Radiator:

When the radiator pipe is damaged, water from outside the radiator can seep into the oil radiator, leading to water contamination in the engine oil.

 

3. Cracks in the Cylinder Liner:

Contact between the cooling water and the working cylinder liner can result in cracks. If these cracks occur, the cooling water will directly enter the cylinder and find its way into the oil pan, causing the oil to turn white and affecting engine combustion.

 

4. Damaged Cylinder Liner Seal Ring:

The cylinder liner seal ring damage is another common reason for oil ingress. During fault troubleshooting, it is essential to check the integrity of the cylinder liner seal ring.

 

5. Damaged Cylinder Gasket:

A damaged cylinder gasket with fast water circulation can lead to water from the water channel flowing into the oil channel, causing oil-water contamination.

 

4 Judgment Methods for Engine Oil Ingress:

 

1. Observe Oil Appearance:

Easily judge the presence of water in the oil by its color. Motor oil without water will appear translucent and oily bright, while water-contaminated oil will appear opaque brown or khaki.

 

2. Check Coolant for Oil:

Inspect the engine coolant for traces of oil. If engine parts are damaged, coolant can enter the lubrication system, and oil will be found in the water tank coolant.

 

3. Observe for Emulsion Formation:

Engine oil mixed with water will chemically react with the coolant, creating an emulsion. Check the dipstick; if it appears white with foam, water ingress may have occurred.

 

4. Monitor Oil Level:

Excess water in the engine oil can cause the oil level to rise. Regularly check the oil level using the dipstick to detect possible water ingress.

 

 

Detecting and addressing oil ingress in excavators is critical to maintaining optimal performance and preventing costly damages. By understanding the major causes of oil-water contamination and implementing effective judgment methods, operators and maintenance workers can ensure the longevity and efficiency of their heavy equipment. Remember, if water enters the engine, professional maintenance workers should be consulted to clean up the water and identify the root cause of the oil ingress.

 

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