Overheating Excavator Hydraulic Oil: Causes and Prevention Measures

Hydraulic systems are vital for the smooth functioning of large-scale machinery like excavators. The hydraulic system relies on hydraulic oil to function properly. However, high temperature of the hydraulic oil can lead to several problems that affect the efficiency and lifespan of the excavator. In this blog, we will discuss the reasons behind the high temperature of excavator hydraulic oil and the preventive measures that can be taken to avoid it.

Reasons for High Temperature of Excavator Hydraulic Oil:

1. Insufficient Heat Dissipation Area: The hydraulic oil tank may be too small or have insufficient heat dissipation area. This can lead to the overheating of the hydraulic oil.

2. Faulty Oil Cooling System: The oil cooling device may not be installed, or the cooling device may be too small in capacity. This can lead to the insufficient cooling of the hydraulic oil.

3. Excessive Flow: In the quantitative pump oil supply system, the excess flow may overflow from the relief valve under high pressure and generate heat during operation.

4. Faulty Unloading Circuit: The unloading circuit in the system may be faulty or not installed, leading to overflow loss and heat when the entire flow of the pump overflows under high pressure.

5. Thin and Long Pipeline: The system pipeline may be too thin and too long, with too many bends, resulting in large local pressure loss and pressure loss along the way.

6. Poor Quality Components: The precision of the components may be poor, and the assembly quality may be inadequate, leading to mechanical friction loss between relative movements.

7. Improper Fit Gap: The fit gap of the fittings may be too small, or the gap may be too large after use and wear, resulting in large internal and external leakage, resulting in large volume loss.

8. High Working Pressure: The working pressure of the hydraulic system may be adjusted much higher than the actual need.

9. Inappropriate Oil Viscosity: The viscosity of the oil may not be selected properly, leading to either high viscosity resistance or increased leakage.

Preventive Measures:

1. Adjust the Overflow Valve Pressure: Check and adjust the pressure of the overflow valve frequently to ensure that it is just right.

2. Select Hydraulic Oil Reasonably: Choose hydraulic oil with the appropriate viscosity. If possible, try to use a lower viscosity to reduce viscosity friction loss.

3. Improve Lubrication Conditions: Improve the lubrication conditions of moving parts to reduce friction loss, which is beneficial to reduce working load and heat generation.

4. Improve Component Quality: Improve the assembly quality and precision of hydraulic components and hydraulic systems, strictly control the fit clearance of fittings and improve lubrication conditions. Use sealing material with a small friction coefficient and improved sealing structure to reduce the starting force of the hydraulic cylinder and minimize heat generated by mechanical friction loss.

5. Increase Cooling Capacity: Add or strengthen cooling capacity when necessary to improve the heat dissipation area and ensure adequate cooling of the hydraulic oil.

In conclusion, high temperature of excavator hydraulic oil can lead to several problems that can affect the efficiency and lifespan of the excavator. It is essential to identify the reasons for high temperature and take preventive measures to avoid it. Regular maintenance and inspection of the hydraulic system can help to prevent overheating of hydraulic oil and ensure the smooth functioning of the excavator.

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