What To Do If Hydraulic Oil Is Contaminated Prevention And Solutions

Maintaining clean and high-quality hydraulic oil is essential for the efficient operation of hydraulic systems, including excavators. However, contamination can occur over time due to various factors, leading to decreased performance and potential damage to the equipment. In this article, we will discuss methods to determine the presence of pollutants in hydraulic oil and provide measures to prevent contamination. By understanding the detection techniques and implementing preventive measures, you can ensure the longevity and optimal functioning of your hydraulic system.

1.Determination Methods for Hydraulic Oil Contamination:

(a) Direct Measurement Method: Observe the oil level in the hydraulic oil tank and check for any abnormalities such as low oil levels causing air intake or air bubbles in the oil return pipe, indicating air contamination in the hydraulic system.

(b) Combustion Measurement Method: Collect a sample of hydraulic oil and heat it on a steel plate. If steam appears followed by fire, it indicates the presence of moisture in the oil. Immediate action should be taken, such as adding a demulsifier and inspecting the system.

(c) Oil Coating Method: Clean seals and potential air intake points, apply a layer of grease, and observe for wrinkles or cracks. If the grease is absorbed, it confirms the presence of air intake at that specific point.

(d) Analogy Measurement Method: Compare the color, foam, and viscosity of the hydraulic oil sample with new oil. Lighter color, milky appearance, or dark brown with deposits can indicate contamination, requiring appropriate actions such as filtration or oil replacement.

2.Measures to Prevent Hydraulic Oil Pollution:

(a) Reduce Residues in the Hydraulic System: Ensure quality surface processing during hydraulic component manufacturing to minimize abrasive generation. Take precautions during transportation to prevent dust, water, and other contaminants from entering the components. Avoid using fiber fabrics for wiping and use wooden or rubber hammers instead of iron hammers for assembly.

(b) Control the Working Temperature of Hydraulic Oil: Maintain the working temperature of the hydraulic system within the recommended range of 85-120°F. Install oil temperature coolers if necessary to prevent overheating, which can lead to decreased lubrication, increased wear, and accelerated seal aging.

(c) Prevent Pollutants from Entering the System: Properly seal the hydraulic oil tank and install high-efficiency filters to prevent dust and moisture from contaminating the system. Regularly filter the hydraulic oil and ensure tightly sealed connections and dust-proof seals on moving parts.

(d) Regularly Check and Maintain the Hydraulic Oil: Regularly inspect and clean filters and oil tanks, ideally replacing filters every two months and oil inlet filters every six months. Replace heavily contaminated hydraulic oil promptly, ensuring thorough cleaning of the oil tank and using filtered oil during refilling.

(e) Regularly Inspect Pipeline Seals: Check and replace damaged seals and tighten pipeline joints regularly to prevent air and moisture from entering the hydraulic system.

Keeping hydraulic oil clean and free from contaminants is crucial for maintaining the performance and durability of hydraulic systems. By employing proper detection methods to identify contamination and implementing preventive measures, such as reducing residues, controlling temperature, preventing pollutants from entering the system, and conducting regular inspections, you can minimize the risk of hydraulic oil contamination in your excavator. Remember, proactive maintenance practices lead to improved reliability, increased productivity, and reduced downtime of your hydraulic equipment.

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