How to Identify and Replace Deteriorated Vickers Vane Pump Oil

Common Signs of Vickers Vane Pump Oil Deterioration

Vickers vane pumps are widely used in industrial hydraulic systems, and their stable operation relies heavily on the quality of hydraulic oil. 

Over time, the oil may deteriorate due to oxidation, contamination, or water ingress, affecting the pump's performance and potentially damaging the equipment.

1. Visual Appearance

• Milky or Emulsified Oil: Indicates water contamination, reducing pumping efficiency.
• Dark Yellow or Brown Color: Often caused by high-temperature oxidation or poor oil quality.
• Particles or Sediment: Suggests dirt or residues entering the system, degrading the oil.

2. Physical Property Changes

• Viscosity Variations: High viscosity increases Flow resistance and heat generation, while low viscosity can lead to leakage and wear.

3. Odor and Sensory Inspection

• Unusual Smell: Deteriorated oil often has a strong acidic or burnt odor.
• Clarity Check: Compare with new oil. If the old oil is cloudy or contains black specks, contamination is likely.

How to Properly Replace Vickers Vane Pump Hydraulic Oil

Step 1: Determine If Replacement Is Necessary

• Change the oil if you observe abnormal color, strong odor, or significant deviation in viscosity.

Step 2: Oil Replacement Process

1. Shut down the equipment and release system pressure.
2. Drain the old hydraulic oil and clean the tank and return filters.
3. Flush the system using a suitable flushing fluid if contamination is severe.
4. Refill with fresh, high-quality hydraulic oil that meets Vickers specifications.
5. Perform a test run for 5–10 minutes and check for any leakage or abnormal temperature rise.

Special Tip

Always replace the hydraulic filter elements along with the oil to prevent re-contamination.

Why High-Quality Hydraulic Oil Matters

• Excellent thermal and oxidation stability
• Superior anti-wear properties to protect pump components
• Good rust and corrosion resistance
• High shear stability for consistent performance

Conclusion: Routine Inspection is Essential

It is recommended to inspect hydraulic oil every 1000–2000 operating hours, or sooner if equipment shows signs of abnormal performance. Timely replacement and system cleanliness can extend pump life and reduce long-term maintenance costs.

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