The effectiveness of cleaning vacuum pump oil depends on the level of contamination and how recently the oil was changed. Here's how you can attempt to clean it:
Running the Pump to Clean the Oil
If your vacuum pump oil has only recently become murky, you might be able to clean it by simply running the pump.
- Operate the Pump at Full Vacuum: Let the vacuum pump run at its full vacuum capacity for an extended period, ideally overnight.
- Observe the Oil's Color: Check the oil's color the next morning. If the oil has returned to a clear gold color, it is likely clean and usable.
- If Still Murky, Change the Oil: If the oil remains murky or discolored, it indicates significant contamination and necessitates an oil change.
Important Note: This method is best suited for oil that has been recently changed and has only minor contamination. Heavily contaminated oil will likely require a complete replacement.
Why Running the Pump Can Help (In Certain Cases)
Running the pump at full vacuum can help remove volatile contaminants like water or solvents that may have found their way into the oil. The vacuum helps these contaminants evaporate, effectively "cleaning" the oil.
Caution: This method will not remove particulate matter or other non-volatile contaminants. If the oil contains debris, sediment, or is heavily discolored due to chemical reactions, it must be changed.
