Veeco MS40 Operation And Maintenance Manual page 76

To change the oil in the external rough pump:
Vacuum Instrument Corp.
2099 Ninth Avenue
Ronkonkoma, NY 11779
631.737.0900
1109-186-00 Rev. C
5. Run the MS-40 for at least five minutes. This will circulate oil
through the pump and "flush" out any contaminants. Repeat
steps 3 & 4 if necessary. If any visible contaminants still appear
in the pump oil repeat steps 3 & 4 again until the pump oil
appears free of contaminants. Make sure that before the MS-40
is used that the pump is filled with a sufficient amount of oil (as
described in step 4).
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). Turn off the
power to the external rough pump.
2. Place the pump on a raised flat surface (e.g., a table or
workbench) so that the pump's oil drain is over a used oil
container.
3. Open the drain valve and wait for the oil to drain out of the
pump. 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. Once the
oil has been completely drained from the pump, replace the
drain plug.
4. On the top of the pump is a fill plug. If it has not already been
removed, unloosen the plug and with a 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.
CAUTION:
Use only 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.
5. Run the mechanical pumps for at least five minutes. This will
circulate oil through the pump and flush out any contaminants.
Repeat Steps 3 & 4 if necessary. If any visible contaminants
still appear in the pump oil repeat Steps 3 & 4 again until the
pump oil appears free of contaminants. Make sure that before
the pump is used that it is filled with a sufficient amount of oil
(as described in Step 4).
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