Replacing the roughing pump’s oil demister element 5-99
4. Ensure that the inscription “TOP” is at the top of the oil demister
element, and, using both hands, carefully fit the oil demister element
and exhaust flange to the roughing pump.
5. Use the 6-mm Allen wrench to fit the 4 bolts securing the exhaust flange
to the roughing pump.
6. Start the instrument (see “Starting the instrument” on page 2-2).
Caution: The bolts securing the source exhaust flange to the
roughing pump must each be sequentially and incrementally
tightened until they are all fully tight.
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