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What size Allen wrench do I need to remove the oil fill plug in the Leybold SV40BI pump on the SQD? - WKB6849

Article number: 6849


  • SQD
  • TQD
  • Leybold SV40BI
  • Leybold SV65BI


The original pump used an 8 mm Allen wrench. The manufacturer changed the oil fill plug and the oil drain plug so they now require a 12 mm Allen wrench. This change was effective since 17 June 2010 and corresponds to pump serial number 31000221916 and higher.


Tools are not covered under a service plan. Waters offers the 12 mm wrench as 700006076 12 mm Hex wrench or you can purchase from a hardware or home improvement store.

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