Routine and Preventive Maintenance
The Vacuum System _____________________________________________________________________
If a six-monthly service is due, it may be more convenient to drain and
replace the oil. In this case, refer to the procedure for changing the rotary
pump oil on page 5-25.
Note
: If the oil has turned dark in color, it should also be replaced. (Clean
rotary pump oil is a clear straw color [Anderol 555] or almost colorless
[UltraGrade 19].)
Adding Oil
WARNING:
Vent the instrument before adding oil. Attempting to add oil
while the pump is running could result in serious personal injury from hot
rotary pump oil.
NOTE:
Do not mix oil types
The oil used in the
Edwards Rotary Pump
is type Ultragrade 19 (P/N
062746 or 062747).
The oil used in the
Busch Rotary Pump
is type Anderol 555 (P/N 060124
or 060125).
Turn Operate Off and vent the instrument. Refer to the chapter
Shutting
Down and Restarting the System
for information on turning Operate
Off and venting.
3.
4. Remove the oil filler plug located above the oil sight glass, marked
, from the pump.
5. Pour the oil into the pump until the oil level in the oil sight glass is close
to, but not above, the upper mark.
5-24
__________________________ MSQ Hardware Manual ____________________________
