Agilent Technologies 5975C TAD VL MSD, Troubleshooting And Maintenance Manual

Page: 124 / 276

124 5975 Series 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
•
Oil- and solvent-resistant
•
Thermally insulated
Procedure
1 Remove the diffusion pump from the MSD. See page 122 . Make sure you
remove the O-ring assembly from the top of the diffusion pump.
2 Cover the top of the diffusion pump with aluminum foil (shiny side up).
3 Heat the diffusion pump at 60 °C for 15 minutes. (For 6890, 7820A, or
7890A GC’s you can use the GC oven.)
4 Pour the old diffusion pump fluid out the top of the pump. Even after
heating, the pump fluid pours very slowly.
5 Check the color of the pump fluid.
WA R N I N G
The pump and pump fluid will be hot. Wear protective gloves when you remove the
pump from the oven.
WA R N I N G
Treat the old pump fluid as hazardous. It may contain traces of toxic chemicals.
WA R N I N G
Methylene chloride is a hazardous solvent. Work in a fume hood and take all
appropriate precautions.