- 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.