I think I goofed the URL for the info on oils. It is

http://www.beckerpumps.com/td1.htm

The last bit is Tee Dee One for tech doc one. At the very end is a
list of various companies and the oil Becker recommends.

Dan


jim rozen wrote in message

Many of the older piston pumps used straight-weight motor
oil. Actually a check of a leybold, alcatel or pfeiffer
vaccum site might pin down the answer to this question.

Jim

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