Veeco MS40 Operation And Maintenance Manual page 75

Changing the Oil in the Pumps
When changing the oil in either the internal or external pump, the oil must be
hot to obtain complete drainage. If the oil is not hot, run the pumps for at least
fifteen minutes to warm up the oil. However, if the unit, and therefore the
pumps, have been running for several hours, it is advisable to shut down the
unit and wait several minutes before changing the oil.
The pumps must be shut down to change the oil. Running a pump without a
sufficient amount of oil will quickly damage the pump.
To change the oil in the internal rough pump:
CAUTION:
Vacuum Instrument Corp.
2099 Ninth Avenue
Ronkonkoma, NY 11779
631.737.0900
1109-186-00 Rev. C
1. Turn off the MS-40. The A.C. power toggle switch is located to
the right of the User Panel (when facing the unit).
2. Remove the right side panel (when facing the unit). Place the
unit so that the right side of the unit rests on the edge of its
utility cart or on the edge of a table or other flat surface.
3. Place a funnel directly underneath the drain on the pump to
collect the drained oil into a suitable container. Open the drain
plug and wait for the oil to drain out of the pump. Once the oil
has been completely drained from the pump, replace the drain
plug. In order to quickly drain the oil from the pump, open the
fill plug located on top of the pump. Make sure to use a large
enough object to collect the oil, removing the oil in this manner
may cause the used oil to splash within its container.
4. On the top of the pump is a fill plug. If it has not yet been
removed, remove the plug and with a narrow funnel refill the
pump. Pour enough oil into the pump so that the oil level as
seen through the sight glass (located on the side of the unit) is
midway between the unit's high/low range. Replace the plug.
Use only a manufacturer's recommended oil or its equivalent.
Use of other oils will produce poor pressure performance
and rapid contamination. Also, do not use solvents or light
flushing oils since complete removal is difficult and its
higher vapor pressure prevents attainment of required vacuum.
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