HP 5973 - To Drain the Foreline Pump

104
4 Maintaining the MSD
To drain the foreline pump
To drain the foreline pump
Materials needed: Book or other solid object approximately 5 cm thick
Container for catching old pump oil, 500 ml
Gloves, oil- and solvent-resistant
Screwdriver, flat-blade, large (8730-0002)
1 Vent the MSD (page 52).
2 If necessary, slide the foreline pump out from under the vacuum manifold.
The foreline pump may be located on the floor, on the lab bench next to or behind
the MSD, or under the vacuum manifold at the back of the MSD.
3 Place a book or other object under the pump motor to tilt it up slightly.
4 Remove the fill cap.
5 Place a container under the drain plug.
6 Remove the drain plug.
Allow the pump oil to drain out. The oil drains faster if it is still warm.
7 Refill the foreline pump (page 106).
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