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GC/MS Systems
Foreline Pump
General Instructions on How to Replace the Pump Oil
• Vent and shut down the MSD.
• Place a container under the drain plug on the foreline pump.
• Remove the fill cap from the top of the pump to expose the fill hole.
• Remove the drain plug from the pump.
• Reconnect the MSD to its power source. Switch on for 2 or 3 seconds, and then switch
it off again. This displaces old oil from the internal pump cavities. Disconnect the power
cord again.
• Reinstall the drain plug and pour pump oil into the fill hole.
• Reinstall the fill cap.
• Reconnect the MSD power cord.
•
Start up and pump down the MSD according to the Instrument Manual procedure.
The oil in the foreline or rough pump should be replaced on average once every six
months, but can vary depending upon applications. After oil replacement, if a foreline trap
is present, the molecular sieves should be replaced.
Avoid contact with the pump oil. The residue from some samples may be toxic. Dispense
of used oil properly.
F
oreline Pump
Pump Oils
Description 5975 Series 5973 Series 5972/5971 Series
Diffusion pump fluid, 18.5 mL 6040-0809
2 required
6040-0809
2 required
6040-0809
Foreline pump oil, P3, 0.5 L 6040-0621
Foreline pump oil, Inland 45, 1 L 6040-0834 6040-0834
High vacuum grease, 25 g 6040-0289 6040-0289 6040-0834
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