Edwards ED 35 Speedivac pump ?

Hi

Just joined so Hello from Sussex UK.

I have an Edwards ED 35 Speedivac Pump but no book/paperwork.

I think I should change the oil before starting it. So I looking for information,

how to change oil, what oil, general running info tips etc.

Any information will be most appreciated. Sorry if this a repeated question as I have not had time to look around the site yet.

In any event kind regards.

Google is a better bet for the answer than here as that isn't a pump we'd use as it's for more specialised applications