To Replace The Diffusion Pump Fluid - Agilent Technologies 5975C TAD VL MSD Troubleshooting And Maintenance Manual

4
General Maintenance

To Replace the Diffusion Pump Fluid

Materials needed
• Aluminum foil, clean
• Cloths, clean, lint-free (05980-60051)
• Container for old diffusion pump fluid
• Diffusion pump fluid, 18.5 mL (6040-0809) – 2 required
• Gloves
Procedure
1
2
The pump and pump fluid will be hot. Wear protective gloves when you remove the
WARNING
pump from the oven.
3
Treat the old pump fluid as hazardous. It may contain traces of toxic chemicals.
WARNING
4
Methylene chloride is a hazardous solvent. Work in a fume hood and take all
WARNING
appropriate precautions.
5
124
•
Oil- and solvent-resistant
•
Thermally insulated
Remove the diffusion pump from the MSD. See
remove the O-ring assembly from the top of the diffusion pump.
Cover the top of the diffusion pump with aluminum foil (shiny side up).
Heat the diffusion pump at 60 °C for 15 minutes. (For 6890, 7820A, or
7890A GC's you can use the GC oven.)
Pour the old diffusion pump fluid out the top of the pump. Even after
heating, the pump fluid pours very slowly.
Check the color of the pump fluid.
5975 Series MSD Troubleshooting and Maintenance Manual
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