In article xn3Aj.53497$pM4.2800@pd7urf1no, says...

I have a chance to get an old, but serviceable medical vacuum pump, at a
very reasonable price. When I switched it, gave off a very offensive odour.
What is the best way to decontaminate the thing? I am thinking in terms of
lots of alcohol, but am open to suggestions.


Change the oil. If it has a gas ballast, crack it open it for a few hours while
the pump is running, this helps carry water and other contaminents through.

--
Dennis